Re: [Xen-devel] Xen PV DomU running Kernel 4.14.5-1.el7.elrepo.x86_64: xl -v vcpu-set <domU> <val> triggers domU kernel WARNING, then domU becomes unresponsive

[Adi Pircalabu <adi@xxxxxxxxxxx>]

On 20-12-2017 21:44, Juergen Gross wrote:
> On 19/12/17 07:31, Adi Pircalabu wrote:
> > Posted initially to centos-virt mailing list. Please note I'm not
> > subscribed to xen-devel.
> >
> > Running "xl -v vcpu-set <domU> <val>" on both CentOS 6 running
> > 4.14.5-1.el6.elrepo.x86_64 and CentOS 7 running
> > 4.14.5-1.el7.elrepo.x86_64 I'm able to trigger this bug where certain
> > commands in the domU stall:
> As I can't reproduce this problem with a 4.15-rc4 upstream kernel
> I suspect this might be a CentOS specific problem.
>
> Or is there anything special which must be done to see the problem?
> You are quite vague in this respect (no config details, no clue whether
> adding or removing vcpus is a problem, nothing mentioned about the
> load of the domUs...).
>
> Juergen
Juergen, see attached the kernel configs for the latest test:
dom0: config-4.9.70-29.el7.x86_64.gz
domU: config-4.14.7-1.el7.elrepo.x86_64.gz

domU xl configuration:
---adi7.cfg---
bootloader = 'pygrub'
memory = 2048
name = 'adi7'
localtime = 1
vcpus = 2
maxvcpus = 4
vif = ['vifname=adi7.0, bridge=br0']
disk = ['phy:/dev/vm/adi7_img,xvda1,w', 'phy:/dev/vm/adi7_swap,xvda2,w']
serial = 'pty'
---adi7.cfg---

System load wise nothing special, just an off the mill test server 
running Apache, Postfix and MySQL whose load is ~0 when adding the 
vcpus.
After running "xl -v vcpu-set adi7 4" I see the reported behaviour, 
where "top" and "ls -l /var/tmp/" block and the following stacktrace 
gets displayed in the dom0 console (note the warning for each additional 
vcpu):
[  106.975761] ------------[ cut here ]------------
[  106.975792] WARNING: CPU: 2 PID: 24 at block/blk-mq.c:1144 
__blk_mq_run_hw_queue+0x89/0xa0
[  106.975802] Modules linked in: ip_set_hash_ip ip_set nfnetlink 
x86_pkg_temp_thermal coretemp crct10dif_pclmul crc32_pclmul 
ghash_clmulni_intel pcbc aesni_intel crypto_simd glue_helper pcspkr 
cryptd intel_rapl_perf nfsd auth_rpcgss nfs_acl lockd grace sunrpc 
ip_tables ext4 mbcache jbd2 xen_netfront xen_blkfront crc32c_intel
[  106.975862] CPU: 2 PID: 24 Comm: kworker/2:0H Not tainted 
4.14.7-1.el7.elrepo.x86_64 #1
[  106.975876] Workqueue: kblockd blk_mq_run_work_fn
[  106.975884] task: ffff88007c539840 task.stack: ffffc900403e4000
[  106.975896] RIP: e030:__blk_mq_run_hw_queue+0x89/0xa0
[  106.975906] RSP: e02b:ffffc900403e7e30 EFLAGS: 00010202
[  106.975915] RAX: 0000000000000001 RBX: ffff8800045d3800 RCX: 
ffff88007d11bca0
[  106.975925] RDX: ffff88007c513f40 RSI: 00000000000000a0 RDI: 
ffff8800045d3800
[  106.975935] RBP: ffffc900403e7e48 R08: 0000000000000000 R09: 
0000000000000000
[  106.975946] R10: 0000000000007ff0 R11: 000000000000b68a R12: 
ffff88007c436900
[  106.975955] R13: ffff88007d11bc80 R14: ffff88007d121b00 R15: 
ffff8800045d3848
[  106.975975] FS:  0000000000000000(0000) GS:ffff88007d100000(0000) 
knlGS:0000000000000000
[  106.975986] CS:  e033 DS: 0000 ES: 0000 CR0: 0000000080050033
[  106.975996] CR2: 00007f9b028092a8 CR3: 0000000079a09000 CR4: 
0000000000042660
[  106.976007] Call Trace:
[  106.976021]  blk_mq_run_work_fn+0x2c/0x30
[  106.976034]  process_one_work+0x149/0x360
[  106.976045]  worker_thread+0x4d/0x3e0
[  106.976056]  kthread+0x109/0x140
[  106.976067]  ? rescuer_thread+0x380/0x380
[  106.976076]  ? kthread_park+0x60/0x60
[  106.976088]  ret_from_fork+0x25/0x30
[  106.976096] Code: 00 e8 4c e8 45 00 4c 89 e7 e8 34 4a d7 ff 48 89 df 
41 89 c5 e8 19 66 00 00 44 89 ee 4c 89 e7 e8 4e 4a d7 ff 5b 41 5c 41 5d 
5d c3 <0f> ff eb b4 48 89 df e8 fb 65 00 00 5b 41 5c 41 5d 5d c3 0f ff
[  106.976181] ---[ end trace 58e7137e56dd77fb ]---
[  106.977792] ------------[ cut here ]------------
[  106.977821] WARNING: CPU: 3 PID: 30 at block/blk-mq.c:1144 
__blk_mq_run_hw_queue+0x89/0xa0
[  106.977838] Modules linked in: ip_set_hash_ip ip_set nfnetlink 
x86_pkg_temp_thermal coretemp crct10dif_pclmul crc32_pclmul 
ghash_clmulni_intel pcbc aesni_intel crypto_simd glue_helper pcspkr 
cryptd intel_rapl_perf nfsd auth_rpcgss nfs_acl lockd grace sunrpc 
ip_tables ext4 mbcache jbd2 xen_netfront xen_blkfront crc32c_intel
[  106.977917] CPU: 3 PID: 30 Comm: kworker/3:0H Tainted: G        W     
  4.14.7-1.el7.elrepo.x86_64 #1
[  106.977940] Workqueue: kblockd blk_mq_run_work_fn
[  106.977954] task: ffff88007c583080 task.stack: ffffc90040414000
[  106.977972] RIP: e030:__blk_mq_run_hw_queue+0x89/0xa0
[  106.977984] RSP: e02b:ffffc90040417e30 EFLAGS: 00010202
[  106.977996] RAX: 0000000000000001 RBX: ffff8800045d3800 RCX: 
ffff88007d19bca0
[  106.978011] RDX: ffff88007c513f40 RSI: 00000000000000e0 RDI: 
ffff8800045d3800
[  106.978024] RBP: ffffc90040417e48 R08: 0000000000000000 R09: 
0000000000000000
[  106.978040] R10: 0000000000007ff0 R11: 00000000000003c6 R12: 
ffff88007c436a80
[  106.978053] R13: ffff88007d19bc80 R14: ffff88007d1a1b00 R15: 
ffff8800045d3848
[  106.978079] FS:  0000000000000000(0000) GS:ffff88007d180000(0000) 
knlGS:ffff88007d180000
[  106.978094] CS:  e033 DS: 0000 ES: 0000 CR0: 0000000080050033
[  106.978108] CR2: 00007ff2afec8000 CR3: 00000000037e1000 CR4: 
0000000000042660
[  106.978122] Call Trace:
[  106.978142]  blk_mq_run_work_fn+0x2c/0x30
[  106.978159]  process_one_work+0x149/0x360
[  106.978174]  worker_thread+0x4d/0x3e0
[  106.978188]  kthread+0x109/0x140
[  106.978202]  ? rescuer_thread+0x380/0x380
[  106.978217]  ? kthread_park+0x60/0x60
[  106.978232]  ret_from_fork+0x25/0x30
[  106.978244] Code: 00 e8 4c e8 45 00 4c 89 e7 e8 34 4a d7 ff 48 89 df 
41 89 c5 e8 19 66 00 00 44 89 ee 4c 89 e7 e8 4e 4a d7 ff 5b 41 5c 41 5d 
5d c3 <0f> ff eb b4 48 89 df e8 fb 65 00 00 5b 41 5c 41 5d 5d c3 0f ff
[  106.978367] ---[ end trace 58e7137e56dd77fc ]---

Additionally, here's an strace output from an ls command run inside the 
domU, which also stalls after "getdents(3, "
---CUT HERE---
[root@adi7 ~]# strace -f -FF -v -vv ls -l /var/tmp/systemd-private-*
execve("/usr/bin/ls", ["ls", "-l", 
"/var/tmp/systemd-private-0c7a350"..., 
"/var/tmp/systemd-private-2221554"..., 
"/var/tmp/systemd-private-2c7e05d"..., 
"/var/tmp/systemd-private-5ae7c40"..., 
"/var/tmp/systemd-private-6edef4a"..., 
"/var/tmp/systemd-private-8a20454"..., 
"/var/tmp/systemd-private-d86a2ca"..., 
"/var/tmp/systemd-private-d9663d8"...], ["XDG_SESSION_ID=2", 
"HOSTNAME=adi7.ddns.local", "TERM=xterm", "SHELL=/bin/bash", 
"HISTSIZE=1000", "SSH_CLIENT=192.168.1.200 50860 2"..., 
"SSH_TTY=/dev/pts/1", "USER=root", 
"LS_COLORS=rs=0:di=01;34:ln=01;36"..., "MAIL=/var/spool/mail/root", 
"PATH=/usr/local/sbin:/usr/local/"..., "PWD=/root", "LANG=en_AU.UTF-8", 
"MODULEPATH=/usr/share/Modules/mo"..., "LOADEDMODULES=", 
"HISTCONTROL=ignoredups", "SHLVL=1", "HOME=/root", "LOGNAME=root", 
"SSH_CONNECTION=192.168.1.200 508"..., "MODULESHOME=/usr/share/Modules", 
"LESSOPEN=||/usr/bin/lesspipe.sh "..., "XDG_RUNTIME_DIR=/run/user/0", 
"BASH_FUNC_module()=() {  eval `/"..., "_=/usr/bin/strace"]) = 0
brk(NULL)                               = 0x165b000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) 
= 0x7fa8c42b6000
access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or 
directory)
open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_dev=makedev(202, 1), st_ino=274871, st_mode=S_IFREG|0644, 
st_nlink=1, st_uid=0, st_gid=0, st_blksize=4096, st_blocks=112, 
st_size=56934, st_atime=2017/12/20-23:00:54.545878695, 
st_mtime=2017/12/19-21:58:57.306130963, 
st_ctime=2017/12/19-21:58:57.306130963}) = 0
mmap(NULL, 56934, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7fa8c42a8000
close(3)                                = 0
open("/lib64/libselinux.so.1", O_RDONLY|O_CLOEXEC) = 3
read(3, 
"\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\300j\0\0\0\0\0\0"..., 
832) = 832
fstat(3, {st_dev=makedev(202, 1), st_ino=542305, st_mode=S_IFREG|0755, 
st_nlink=1, st_uid=0, st_gid=0, st_blksize=4096, st_blocks=312, 
st_size=155744, st_atime=2017/12/21-19:57:50.535656136, 
st_mtime=2017/08/03-16:19:05, st_ctime=2017/09/21-12:55:28.267411133}) = 
0
mmap(NULL, 2255216, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 
0) = 0x7fa8c3e6f000
mprotect(0x7fa8c3e93000, 2093056, PROT_NONE) = 0
mmap(0x7fa8c4092000, 8192, PROT_READ|PROT_WRITE, 
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x23000) = 0x7fa8c4092000
mmap(0x7fa8c4094000, 6512, PROT_READ|PROT_WRITE, 
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fa8c4094000
close(3)                                = 0
open("/lib64/libcap.so.2", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0 
\26\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_dev=makedev(202, 1), st_ino=524787, st_mode=S_IFREG|0755, 
st_nlink=1, st_uid=0, st_gid=0, st_blksize=4096, st_blocks=40, 
st_size=20032, st_atime=2017/12/21-19:57:50.534656136, 
st_mtime=2017/08/03-05:17:59, st_ctime=2017/09/21-12:54:30.500386962}) = 
0
mmap(NULL, 2114112, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 
0) = 0x7fa8c3c6a000
mprotect(0x7fa8c3c6e000, 2093056, PROT_NONE) = 0
mmap(0x7fa8c3e6d000, 8192, PROT_READ|PROT_WRITE, 
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x3000) = 0x7fa8c3e6d000
close(3)                                = 0
open("/lib64/libacl.so.1", O_RDONLY|O_CLOEXEC) = 3
read(3, 
"\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\200\37\0\0\0\0\0\0"..., 
832) = 832
fstat(3, {st_dev=makedev(202, 1), st_ino=524910, st_mode=S_IFREG|0755, 
st_nlink=1, st_uid=0, st_gid=0, st_blksize=4096, st_blocks=80, 
st_size=37056, st_atime=2017/12/21-19:57:50.653656136, 
st_mtime=2014/06/10-18:43:26, st_ctime=2016/06/01-16:34:29.056212205}) = 
0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) 
= 0x7fa8c42a7000
mmap(NULL, 2130560, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 
0) = 0x7fa8c3a61000
mprotect(0x7fa8c3a68000, 2097152, PROT_NONE) = 0
mmap(0x7fa8c3c68000, 8192, PROT_READ|PROT_WRITE, 
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x7000) = 0x7fa8c3c68000
close(3)                                = 0
open("/lib64/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, 
"\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\20\35\2\0\0\0\0\0"..., 
832) = 832
fstat(3, {st_dev=makedev(202, 1), st_ino=529040, st_mode=S_IFREG|0755, 
st_nlink=1, st_uid=0, st_gid=0, st_blksize=4096, st_blocks=4160, 
st_size=2127336, st_atime=2017/12/20-23:00:54.541878695, 
st_mtime=2017/12/01-05:53:14, st_ctime=2017/12/05-09:50:02.410499794}) = 
0
mmap(NULL, 3940800, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 
0) = 0x7fa8c369e000
mprotect(0x7fa8c3856000, 2097152, PROT_NONE) = 0
mmap(0x7fa8c3a56000, 24576, PROT_READ|PROT_WRITE, 
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1b8000) = 0x7fa8c3a56000
mmap(0x7fa8c3a5c000, 16832, PROT_READ|PROT_WRITE, 
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fa8c3a5c000
close(3)                                = 0
open("/lib64/libpcre.so.1", O_RDONLY|O_CLOEXEC) = 3
read(3, 
"\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\360\25\0\0\0\0\0\0"..., 
832) = 832
fstat(3, {st_dev=makedev(202, 1), st_ino=526463, st_mode=S_IFREG|0755, 
st_nlink=1, st_uid=0, st_gid=0, st_blksize=4096, st_blocks=792, 
st_size=402384, st_atime=2017/12/21-19:57:50.536656136, 
st_mtime=2017/08/02-13:08:00, st_ctime=2017/09/21-12:55:18.129055882}) = 
0
mmap(NULL, 2494984, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 
0) = 0x7fa8c343c000
mprotect(0x7fa8c349c000, 2097152, PROT_NONE) = 0
mmap(0x7fa8c369c000, 8192, PROT_READ|PROT_WRITE, 
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x60000) = 0x7fa8c369c000
close(3)                                = 0
open("/lib64/libdl.so.2", O_RDONLY|O_CLOEXEC) = 3
read(3, 
"\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0`\16\0\0\0\0\0\0"..., 
832) = 832
fstat(3, {st_dev=makedev(202, 1), st_ino=526389, st_mode=S_IFREG|0755, 
st_nlink=1, st_uid=0, st_gid=0, st_blksize=4096, st_blocks=40, 
st_size=19776, st_atime=2017/12/20-23:00:54.620878695, 
st_mtime=2017/12/01-05:53:14, st_ctime=2017/12/05-09:50:02.417499783}) = 
0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) 
= 0x7fa8c42a6000
mmap(NULL, 2109744, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 
0) = 0x7fa8c3238000
mprotect(0x7fa8c323a000, 2097152, PROT_NONE) = 0
mmap(0x7fa8c343a000, 8192, PROT_READ|PROT_WRITE, 
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0x7fa8c343a000
close(3)                                = 0
open("/lib64/libattr.so.1", O_RDONLY|O_CLOEXEC) = 3
read(3, 
"\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\320\23\0\0\0\0\0\0"..., 
832) = 832
fstat(3, {st_dev=makedev(202, 1), st_ino=526457, st_mode=S_IFREG|0755, 
st_nlink=1, st_uid=0, st_gid=0, st_blksize=4096, st_blocks=40, 
st_size=19888, st_atime=2017/12/21-19:57:50.535656136, 
st_mtime=2014/06/10-14:33:35, st_ctime=2016/06/01-16:34:30.513277058}) = 
0
mmap(NULL, 2113904, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 
0) = 0x7fa8c3033000
mprotect(0x7fa8c3037000, 2093056, PROT_NONE) = 0
mmap(0x7fa8c3236000, 8192, PROT_READ|PROT_WRITE, 
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x3000) = 0x7fa8c3236000
close(3)                                = 0
open("/lib64/libpthread.so.0", O_RDONLY|O_CLOEXEC) = 3
read(3, 
"\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\0m\0\0\0\0\0\0"..., 832) 
= 832
fstat(3, {st_dev=makedev(202, 1), st_ino=524468, st_mode=S_IFREG|0755, 
st_nlink=1, st_uid=0, st_gid=0, st_blksize=4096, st_blocks=288, 
st_size=144792, st_atime=2017/12/20-23:00:54.542878695, 
st_mtime=2017/12/01-05:53:14, st_ctime=2017/12/05-09:50:02.465499708}) = 
0
mmap(NULL, 2208904, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 
0) = 0x7fa8c2e17000
mprotect(0x7fa8c2e2e000, 2093056, PROT_NONE) = 0
mmap(0x7fa8c302d000, 8192, PROT_READ|PROT_WRITE, 
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x16000) = 0x7fa8c302d000
mmap(0x7fa8c302f000, 13448, PROT_READ|PROT_WRITE, 
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fa8c302f000
close(3)                                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) 
= 0x7fa8c42a5000
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) 
= 0x7fa8c42a3000
arch_prctl(ARCH_SET_FS, 0x7fa8c42a3800) = 0
mprotect(0x7fa8c3a56000, 16384, PROT_READ) = 0
mprotect(0x7fa8c302d000, 4096, PROT_READ) = 0
mprotect(0x7fa8c3236000, 4096, PROT_READ) = 0
mprotect(0x7fa8c343a000, 4096, PROT_READ) = 0
mprotect(0x7fa8c369c000, 4096, PROT_READ) = 0
mprotect(0x7fa8c3c68000, 4096, PROT_READ) = 0
mprotect(0x7fa8c3e6d000, 4096, PROT_READ) = 0
mprotect(0x7fa8c4092000, 4096, PROT_READ) = 0
mprotect(0x61a000, 4096, PROT_READ)     = 0
mprotect(0x7fa8c42b7000, 4096, PROT_READ) = 0
munmap(0x7fa8c42a8000, 56934)           = 0
set_tid_address(0x7fa8c42a3ad0)         = 1366
set_robust_list(0x7fa8c42a3ae0, 24)     = 0
rt_sigaction(SIGRTMIN, {0x7fa8c2e1d7e0, [], SA_RESTORER|SA_SIGINFO, 
0x7fa8c2e265e0}, NULL, 8) = 0
rt_sigaction(SIGRT_1, {0x7fa8c2e1d870, [], 
SA_RESTORER|SA_RESTART|SA_SIGINFO, 0x7fa8c2e265e0}, NULL, 8) = 0
rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0
getrlimit(RLIMIT_STACK, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) 
= 0
statfs("/sys/fs/selinux", 0x7fffc0efd670) = -1 ENOENT (No such file or 
directory)
statfs("/selinux", 0x7fffc0efd670)      = -1 ENOENT (No such file or 
directory)
brk(NULL)                               = 0x165b000
brk(0x167c000)                          = 0x167c000
open("/proc/filesystems", O_RDONLY)     = 3
fstat(3, {st_dev=makedev(0, 4), st_ino=4026532044, st_mode=S_IFREG|0444, 
st_nlink=1, st_uid=0, st_gid=0, st_blksize=1024, st_blocks=0, st_size=0, 
st_atime=2017/12/21-09:14:59.765240000, 
st_mtime=2017/12/21-09:14:59.765240000, 
st_ctime=2017/12/21-09:14:59.765240000}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) 
= 0x7fa8c42b5000
read(3, "nodev\tsysfs\nnodev\trootfs\nnodev\tr"..., 1024) = 320
stat("/etc/sysconfig/64bit_strstr_via_64bit_strstr_sse2_unaligned", 
0x7fffc0efd130) = -1 ENOENT (No such file or directory)
read(3, "", 1024)                       = 0
close(3)                                = 0
munmap(0x7fa8c42b5000, 4096)            = 0
access("/etc/selinux/config", F_OK)     = 0
open("/usr/lib/locale/locale-archive", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_dev=makedev(202, 1), st_ino=1180639, st_mode=S_IFREG|0644, 
st_nlink=1, st_uid=0, st_gid=0, st_blksize=4096, st_blocks=207120, 
st_size=106070960, st_atime=2017/12/20-23:00:54.620878695, 
st_mtime=2017/12/05-09:50:01.917500550, 
st_ctime=2017/12/05-09:50:01.917500550}) = 0
mmap(NULL, 106070960, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7fa8bc8ee000
close(3)                                = 0
ioctl(1, TCGETS, {c_iflags=0x2d00, c_oflags=0x5, c_cflags=0xbf, 
c_lflags=0x8a3b, c_line=0, 
c_cc="\x03\x1c\x7f\x15\x04\x00\x01\x00\x11\x13\x1a\xff\x12\x0f\x17\x16\xff\x00\x00"}) 
= 0
ioctl(1, TIOCGWINSZ, {ws_row=66, ws_col=237, ws_xpixel=0, ws_ypixel=0}) 
= 0
open("/usr/share/locale/locale.alias", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_dev=makedev(202, 1), st_ino=529900, st_mode=S_IFREG|0644, 
st_nlink=1, st_uid=0, st_gid=0, st_blksize=4096, st_blocks=8, 
st_size=2502, st_atime=2017/12/20-23:00:54.785878695, 
st_mtime=2017/12/01-05:23:53, st_ctime=2017/12/05-09:49:59.813503804}) = 
0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) 
= 0x7fa8c42b5000
read(3, "# Locale name alias data base.\n#"..., 4096) = 2502
read(3, "", 4096)                       = 0
close(3)                                = 0
munmap(0x7fa8c42b5000, 4096)            = 0
open("/usr/share/locale/en_AU.UTF-8/LC_TIME/coreutils.mo", O_RDONLY) = 
-1 ENOENT (No such file or directory)
open("/usr/share/locale/en_AU.utf8/LC_TIME/coreutils.mo", O_RDONLY) = -1 
ENOENT (No such file or directory)
open("/usr/share/locale/en_AU/LC_TIME/coreutils.mo", O_RDONLY) = -1 
ENOENT (No such file or directory)
open("/usr/share/locale/en.UTF-8/LC_TIME/coreutils.mo", O_RDONLY) = -1 
ENOENT (No such file or directory)
open("/usr/share/locale/en.utf8/LC_TIME/coreutils.mo", O_RDONLY) = -1 
ENOENT (No such file or directory)
open("/usr/share/locale/en/LC_TIME/coreutils.mo", O_RDONLY) = -1 ENOENT 
(No such file or directory)
stat("/etc/sysconfig/64bit_strstr_via_64bit_strstr_sse2_unaligned", 
0x7fffc0efcdb0) = -1 ENOENT (No such file or directory)
open("/usr/lib64/gconv/gconv-modules.cache", O_RDONLY) = 3
fstat(3, {st_dev=makedev(202, 1), st_ino=525763, st_mode=S_IFREG|0644, 
st_nlink=1, st_uid=0, st_gid=0, st_blksize=4096, st_blocks=56, 
st_size=26254, st_atime=2017/12/20-23:00:54.668878695, 
st_mtime=2017/12/05-09:50:03.338498355, 
st_ctime=2017/12/05-09:50:03.338498355}) = 0
mmap(NULL, 26254, PROT_READ, MAP_SHARED, 3, 0) = 0x7fa8c42af000
close(3)                                = 0
futex(0x7fa8c3a5ba80, FUTEX_WAKE_PRIVATE, 2147483647) = 0
lstat("/var/tmp/systemd-private-0c7a350d942741fdaa845a90b7bf75d8-ntpd.service-97ssE3", 
{st_dev=makedev(202, 1), st_ino=1050452, st_mode=S_IFDIR|0700, 
st_nlink=3, st_uid=0, st_gid=0, st_blksize=4096, st_blocks=8, 
st_size=4096, st_atime=2017/11/27-14:34:16.749978000, 
st_mtime=2017/11/27-14:34:16.749978000, 
st_ctime=2017/11/27-14:34:16.749978000}) = 0
lgetxattr("/var/tmp/systemd-private-0c7a350d942741fdaa845a90b7bf75d8-ntpd.service-97ssE3", 
"security.selinux", 0x1662100, 255) = -1 ENODATA (No data available)
getxattr("/var/tmp/systemd-private-0c7a350d942741fdaa845a90b7bf75d8-ntpd.service-97ssE3", 
"system.posix_acl_access", NULL, 0) = -1 ENODATA (No data available)
getxattr("/var/tmp/systemd-private-0c7a350d942741fdaa845a90b7bf75d8-ntpd.service-97ssE3", 
"system.posix_acl_default", NULL, 0) = -1 ENODATA (No data available)
socket(AF_LOCAL, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0) = 3
connect(3, {sa_family=AF_LOCAL, sun_path="/var/run/nscd/socket"}, 110) = 
-1 ENOENT (No such file or directory)
close(3)                                = 0
socket(AF_LOCAL, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0) = 3
connect(3, {sa_family=AF_LOCAL, sun_path="/var/run/nscd/socket"}, 110) = 
-1 ENOENT (No such file or directory)
close(3)                                = 0
open("/etc/nsswitch.conf", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_dev=makedev(202, 1), st_ino=264990, st_mode=S_IFREG|0644, 
st_nlink=1, st_uid=0, st_gid=0, st_blksize=4096, st_blocks=8, 
st_size=1728, st_atime=2017/12/21-19:57:50.660656136, 
st_mtime=2017/05/26-22:19:54, st_ctime=2017/09/21-12:37:15.951810236}) = 
0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) 
= 0x7fa8c42ae000
read(3, "#\n# /etc/nsswitch.conf\n#\n# An ex"..., 4096) = 1728
read(3, "", 4096)                       = 0
close(3)                                = 0
munmap(0x7fa8c42ae000, 4096)            = 0
open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_dev=makedev(202, 1), st_ino=274871, st_mode=S_IFREG|0644, 
st_nlink=1, st_uid=0, st_gid=0, st_blksize=4096, st_blocks=112, 
st_size=56934, st_atime=2017/12/20-23:00:54.545878695, 
st_mtime=2017/12/19-21:58:57.306130963, 
st_ctime=2017/12/19-21:58:57.306130963}) = 0
mmap(NULL, 56934, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7fa8c4295000
close(3)                                = 0
open("/lib64/libnss_files.so.2", O_RDONLY|O_CLOEXEC) = 3
read(3, 
"\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\320!\0\0\0\0\0\0"..., 
832) = 832
fstat(3, {st_dev=makedev(202, 1), st_ino=526049, st_mode=S_IFREG|0755, 
st_nlink=1, st_uid=0, st_gid=0, st_blksize=4096, st_blocks=128, 
st_size=62184, st_atime=2017/12/20-23:00:54.680878695, 
st_mtime=2017/12/01-05:53:15, st_ctime=2017/12/05-09:50:02.457499721}) = 
0
mmap(NULL, 2173048, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 
0) = 0x7fa8bc6db000
mprotect(0x7fa8bc6e7000, 2093056, PROT_NONE) = 0
mmap(0x7fa8bc8e6000, 8192, PROT_READ|PROT_WRITE, 
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0xb000) = 0x7fa8bc8e6000
mmap(0x7fa8bc8e8000, 22648, PROT_READ|PROT_WRITE, 
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fa8bc8e8000
close(3)                                = 0
mprotect(0x7fa8bc8e6000, 4096, PROT_READ) = 0
munmap(0x7fa8c4295000, 56934)           = 0
open("/etc/passwd", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_dev=makedev(202, 1), st_ino=281872, st_mode=S_IFREG|0644, 
st_nlink=1, st_uid=0, st_gid=0, st_blksize=4096, st_blocks=8, 
st_size=2644, st_atime=2017/12/20-23:00:54.681878695, 
st_mtime=2017/12/12-16:13:50.001133643, 
st_ctime=2017/12/12-16:13:50.028133601}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) 
= 0x7fa8c42ae000
read(3, "root:x:0:0:root:/root:/bin/bash\n"..., 4096) = 2644
close(3)                                = 0
munmap(0x7fa8c42ae000, 4096)            = 0
socket(AF_LOCAL, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0) = 3
connect(3, {sa_family=AF_LOCAL, sun_path="/var/run/nscd/socket"}, 110) = 
-1 ENOENT (No such file or directory)
close(3)                                = 0
socket(AF_LOCAL, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0) = 3
connect(3, {sa_family=AF_LOCAL, sun_path="/var/run/nscd/socket"}, 110) = 
-1 ENOENT (No such file or directory)
close(3)                                = 0
open("/etc/group", O_RDONLY|O_CLOEXEC)  = 3
fstat(3, {st_dev=makedev(202, 1), st_ino=281870, st_mode=S_IFREG|0644, 
st_nlink=1, st_uid=0, st_gid=0, st_blksize=4096, st_blocks=8, 
st_size=1180, st_atime=2017/12/20-23:00:54.900878695, 
st_mtime=2017/12/12-16:13:49.791133973, 
st_ctime=2017/12/12-16:13:49.816133934}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) 
= 0x7fa8c42ae000
read(3, "root:x:0:\nbin:x:1:\ndaemon:x:2:\ns"..., 4096) = 1180
close(3)                                = 0
munmap(0x7fa8c42ae000, 4096)            = 0
lstat("/var/tmp/systemd-private-22215545c29841db966225d8cddf4aff-ntpd.service-8fY4ZW", 
{st_dev=makedev(202, 1), st_ino=1050731, st_mode=S_IFDIR|0700, 
st_nlink=3, st_uid=0, st_gid=0, st_blksize=4096, st_blocks=8, 
st_size=4096, st_atime=2017/12/20-12:57:35.472716000, 
st_mtime=2017/12/20-12:57:35.489716000, 
st_ctime=2017/12/20-12:57:35.489716000}) = 0
lgetxattr("/var/tmp/systemd-private-22215545c29841db966225d8cddf4aff-ntpd.service-8fY4ZW", 
"security.selinux", 0x16638a0, 255) = -1 ENODATA (No data available)
getxattr("/var/tmp/systemd-private-22215545c29841db966225d8cddf4aff-ntpd.service-8fY4ZW", 
"system.posix_acl_access", NULL, 0) = -1 ENODATA (No data available)
getxattr("/var/tmp/systemd-private-22215545c29841db966225d8cddf4aff-ntpd.service-8fY4ZW", 
"system.posix_acl_default", NULL, 0) = -1 ENODATA (No data available)
lstat("/var/tmp/systemd-private-2c7e05d7c51f4cea9bd21ad9e047b6f9-ntpd.service-LgnllP", 
{st_dev=makedev(202, 1), st_ino=1454345, st_mode=S_IFDIR|0700, 
st_nlink=3, st_uid=0, st_gid=0, st_blksize=4096, st_blocks=8, 
st_size=4096, st_atime=2017/12/12-10:57:42.730684000, 
st_mtime=2017/12/12-10:57:42.733684000, 
st_ctime=2017/12/12-10:57:42.733684000}) = 0
lgetxattr("/var/tmp/systemd-private-2c7e05d7c51f4cea9bd21ad9e047b6f9-ntpd.service-LgnllP", 
"security.selinux", 0x1663900, 255) = -1 ENODATA (No data available)
getxattr("/var/tmp/systemd-private-2c7e05d7c51f4cea9bd21ad9e047b6f9-ntpd.service-LgnllP", 
"system.posix_acl_access", NULL, 0) = -1 ENODATA (No data available)
getxattr("/var/tmp/systemd-private-2c7e05d7c51f4cea9bd21ad9e047b6f9-ntpd.service-LgnllP", 
"system.posix_acl_default", NULL, 0) = -1 ENODATA (No data available)
lstat("/var/tmp/systemd-private-5ae7c40b551e4c5e81826da14aa582ce-ntpd.service-V3E1o1", 
{st_dev=makedev(202, 1), st_ino=1051375, st_mode=S_IFDIR|0700, 
st_nlink=3, st_uid=0, st_gid=0, st_blksize=4096, st_blocks=8, 
st_size=4096, st_atime=2017/12/20-12:12:38.561900000, 
st_mtime=2017/12/20-12:12:38.561900000, 
st_ctime=2017/12/20-12:12:38.561900000}) = 0
lgetxattr("/var/tmp/systemd-private-5ae7c40b551e4c5e81826da14aa582ce-ntpd.service-V3E1o1", 
"security.selinux", 0x1663960, 255) = -1 ENODATA (No data available)
getxattr("/var/tmp/systemd-private-5ae7c40b551e4c5e81826da14aa582ce-ntpd.service-V3E1o1", 
"system.posix_acl_access", NULL, 0) = -1 ENODATA (No data available)
getxattr("/var/tmp/systemd-private-5ae7c40b551e4c5e81826da14aa582ce-ntpd.service-V3E1o1", 
"system.posix_acl_default", NULL, 0) = -1 ENODATA (No data available)
lstat("/var/tmp/systemd-private-6edef4a620334c5eaf22a8dae612bbeb-ntpd.service-Upo819", 
{st_dev=makedev(202, 1), st_ino=1051978, st_mode=S_IFDIR|0700, 
st_nlink=3, st_uid=0, st_gid=0, st_blksize=4096, st_blocks=8, 
st_size=4096, st_atime=2017/11/27-15:21:25.720273000, 
st_mtime=2017/11/27-15:21:25.720273000, 
st_ctime=2017/11/27-15:21:25.720273000}) = 0
lgetxattr("/var/tmp/systemd-private-6edef4a620334c5eaf22a8dae612bbeb-ntpd.service-Upo819", 
"security.selinux", 0x16639c0, 255) = -1 ENODATA (No data available)
getxattr("/var/tmp/systemd-private-6edef4a620334c5eaf22a8dae612bbeb-ntpd.service-Upo819", 
"system.posix_acl_access", NULL, 0) = -1 ENODATA (No data available)
getxattr("/var/tmp/systemd-private-6edef4a620334c5eaf22a8dae612bbeb-ntpd.service-Upo819", 
"system.posix_acl_default", NULL, 0) = -1 ENODATA (No data available)
lstat("/var/tmp/systemd-private-8a2045497d51477ea7025d407e94528e-ntpd.service-CF2zs7", 
{st_dev=makedev(202, 1), st_ino=1454347, st_mode=S_IFDIR|0700, 
st_nlink=3, st_uid=0, st_gid=0, st_blksize=4096, st_blocks=8, 
st_size=4096, st_atime=2017/12/12-11:20:20.245564000, 
st_mtime=2017/12/12-11:20:20.265564000, 
st_ctime=2017/12/12-11:20:20.265564000}) = 0
lgetxattr("/var/tmp/systemd-private-8a2045497d51477ea7025d407e94528e-ntpd.service-CF2zs7", 
"security.selinux", 0x1663a20, 255) = -1 ENODATA (No data available)
getxattr("/var/tmp/systemd-private-8a2045497d51477ea7025d407e94528e-ntpd.service-CF2zs7", 
"system.posix_acl_access", NULL, 0) = -1 ENODATA (No data available)
getxattr("/var/tmp/systemd-private-8a2045497d51477ea7025d407e94528e-ntpd.service-CF2zs7", 
"system.posix_acl_default", NULL, 0) = -1 ENODATA (No data available)
lstat("/var/tmp/systemd-private-d86a2ca9a4a04b8184c7f74d22993c2e-ntpd.service-qCcBAF", 
{st_dev=makedev(202, 1), st_ino=1050290, st_mode=S_IFDIR|0700, 
st_nlink=3, st_uid=0, st_gid=0, st_blksize=4096, st_blocks=8, 
st_size=4096, st_atime=2017/12/21-08:58:02.706436000, 
st_mtime=2017/12/21-08:58:02.706436000, 
st_ctime=2017/12/21-08:58:02.706436000}) = 0
lgetxattr("/var/tmp/systemd-private-d86a2ca9a4a04b8184c7f74d22993c2e-ntpd.service-qCcBAF", 
"security.selinux", 0x1663a80, 255) = -1 ENODATA (No data available)
getxattr("/var/tmp/systemd-private-d86a2ca9a4a04b8184c7f74d22993c2e-ntpd.service-qCcBAF", 
"system.posix_acl_access", NULL, 0) = -1 ENODATA (No data available)
getxattr("/var/tmp/systemd-private-d86a2ca9a4a04b8184c7f74d22993c2e-ntpd.service-qCcBAF", 
"system.posix_acl_default", NULL, 0) = -1 ENODATA (No data available)
lstat("/var/tmp/systemd-private-d9663d830437445b9bf063e123ff3128-ntpd.service-sVUmbJ", 
{st_dev=makedev(202, 1), st_ino=1198577, st_mode=S_IFDIR|0700, 
st_nlink=3, st_uid=0, st_gid=0, st_blksize=4096, st_blocks=8, 
st_size=4096, st_atime=2017/12/12-12:19:03.569441000, 
st_mtime=2017/12/12-12:19:03.569441000, 
st_ctime=2017/12/12-12:19:03.569441000}) = 0
lgetxattr("/var/tmp/systemd-private-d9663d830437445b9bf063e123ff3128-ntpd.service-sVUmbJ", 
"security.selinux", 0x1663ae0, 255) = -1 ENODATA (No data available)
getxattr("/var/tmp/systemd-private-d9663d830437445b9bf063e123ff3128-ntpd.service-sVUmbJ", 
"system.posix_acl_access", NULL, 0) = -1 ENODATA (No data available)
getxattr("/var/tmp/systemd-private-d9663d830437445b9bf063e123ff3128-ntpd.service-sVUmbJ", 
"system.posix_acl_default", NULL, 0) = -1 ENODATA (No data available)
openat(AT_FDCWD, 
"/var/tmp/systemd-private-0c7a350d942741fdaa845a90b7bf75d8-ntpd.service-97ssE3", 
O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 3
fstat(1, {st_dev=makedev(0, 18), st_ino=4, st_mode=S_IFCHR|0620, 
st_nlink=1, st_uid=0, st_gid=5, st_blksize=1024, st_blocks=0, 
st_rdev=makedev(136, 1), st_atime=2017/12/21-09:14:56.816061842, 
st_mtime=2017/12/21-09:14:56.816061842, 
st_ctime=2017/12/21-09:00:30.816061842}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) 
= 0x7fa8c42ae000
write(1, "/var/tmp/systemd-private-0c7a350"..., 
79/var/tmp/systemd-private-0c7a350d942741fdaa845a90b7bf75d8-ntpd.service-97ssE3:
) = 79
getdents(3,
---CUT HERE---

Now, after I run "xl -v vcpu-set adi7 2" to revert to the boot vcpu 
configuration all the previous commands unblock and the domU *appears* 
to recover. "strace -f -FF -v -vv ls -l /var/tmp/systemd-private-*" 
displays (concatenate with "getdents(3," above):
---CUT HERE---
[{d_ino=1048583, d_off=5473995461480594364, d_reclen=24, d_name="..", 
d_type=DT_DIR}, {d_ino=1050452, d_off=5474584235287975125, d_reclen=24, 
d_name=".", d_type=DT_DIR}, {d_ino=1050887, d_off=9223372036854775807, 
d_reclen=24, d_name="tmp", d_type=DT_DIR}], 32768) = 72
lstat("/var/tmp/systemd-private-0c7a350d942741fdaa845a90b7bf75d8-ntpd.service-97ssE3/tmp", 
{st_dev=makedev(202, 1), st_ino=1050887, st_mode=S_IFDIR|S_ISVTX|0777, 
st_nlink=2, st_uid=0, st_gid=0, st_blksize=4096, st_blocks=8, 
st_size=4096, st_atime=2017/11/27-14:34:16.749978000, 
st_mtime=2017/11/27-14:34:16.749978000, 
st_ctime=2017/11/27-14:34:16.749978000}) = 0
lgetxattr("/var/tmp/systemd-private-0c7a350d942741fdaa845a90b7bf75d8-ntpd.service-97ssE3/tmp", 
"security.selinux", 0x15e8e30, 255) = -1 ENODATA (No data available)
getxattr("/var/tmp/systemd-private-0c7a350d942741fdaa845a90b7bf75d8-ntpd.service-97ssE3/tmp", 
"system.posix_acl_access", NULL, 0) = -1 ENODATA (No data available)
getxattr("/var/tmp/systemd-private-0c7a350d942741fdaa845a90b7bf75d8-ntpd.service-97ssE3/tmp", 
"system.posix_acl_default", NULL, 0) = -1 ENODATA (No data available)
getdents(3, [], 32768)                  = 0
close(3)                                = 0
open("/usr/share/locale/en_AU.UTF-8/LC_MESSAGES/coreutils.mo", O_RDONLY) 
= -1 ENOENT (No such file or directory)
open("/usr/share/locale/en_AU.utf8/LC_MESSAGES/coreutils.mo", O_RDONLY) 
= -1 ENOENT (No such file or directory)
open("/usr/share/locale/en_AU/LC_MESSAGES/coreutils.mo", O_RDONLY) = -1 
ENOENT (No such file or directory)
open("/usr/share/locale/en.UTF-8/LC_MESSAGES/coreutils.mo", O_RDONLY) = 
-1 ENOENT (No such file or directory)
open("/usr/share/locale/en.utf8/LC_MESSAGES/coreutils.mo", O_RDONLY) = 
-1 ENOENT (No such file or directory)
open("/usr/share/locale/en/LC_MESSAGES/coreutils.mo", O_RDONLY) = -1 
ENOENT (No such file or directory)
write(1, "total 4\n", 8total 4
)                = 8
open("/etc/localtime", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_dev=makedev(202, 1), st_ino=538370, st_mode=S_IFREG|0644, 
st_nlink=2, st_uid=0, st_gid=0, st_blksize=4096, st_blocks=8, 
st_size=2197, st_atime=2017/12/21-19:57:50.710656136, 
st_mtime=2017/10/25-22:11:30, st_ctime=2017/10/26-09:24:22.154125546}) = 
0
fstat(3, {st_dev=makedev(202, 1), st_ino=538370, st_mode=S_IFREG|0644, 
st_nlink=2, st_uid=0, st_gid=0, st_blksize=4096, st_blocks=8, 
st_size=2197, st_atime=2017/12/21-19:57:50.710656136, 
st_mtime=2017/10/25-22:11:30, st_ctime=2017/10/26-09:24:22.154125546}) = 
0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) 
= 0x7f93d7970000
read(3, 
"TZif2\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\4\0\0\0\4\0\0\0\0"..., 4096) 
= 2197
lseek(3, -1406, SEEK_CUR)               = 791
read(3, 
"TZif2\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\5\0\0\0\5\0\0\0\0"..., 4096) 
= 1406
close(3)                                = 0
munmap(0x7f93d7970000, 4096)            = 0
clock_gettime(CLOCK_REALTIME, {1513808592, 277804875}) = 0
write(1, "drwxrwxrwt 2 root root 4096 Nov "..., 45drwxrwxrwt 2 root root 
4096 Nov 27 14:34 tmp
) = 45
openat(AT_FDCWD, 
"/var/tmp/systemd-private-22215545c29841db966225d8cddf4aff-ntpd.service-8fY4ZW", 
O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 3
write(1, "\n", 1
)                       = 1
write(1, "/var/tmp/systemd-private-2221554"..., 
79/var/tmp/systemd-private-22215545c29841db966225d8cddf4aff-ntpd.service-8fY4ZW:
) = 79
getdents(3, [{d_ino=1048583, d_off=5473995461480594364, d_reclen=24, 
d_name="..", d_type=DT_DIR}, {d_ino=1050731, d_off=5474584235287975125, 
d_reclen=24, d_name=".", d_type=DT_DIR}, {d_ino=1055764, 
d_off=9223372036854775807, d_reclen=24, d_name="tmp", d_type=DT_DIR}], 
32768) = 72
lstat("/var/tmp/systemd-private-22215545c29841db966225d8cddf4aff-ntpd.service-8fY4ZW/tmp", 
{st_dev=makedev(202, 1), st_ino=1055764, st_mode=S_IFDIR|S_ISVTX|0777, 
st_nlink=2, st_uid=0, st_gid=0, st_blksize=4096, st_blocks=8, 
st_size=4096, st_atime=2017/12/20-12:57:35.472716000, 
st_mtime=2017/12/20-12:57:35.472716000, 
st_ctime=2017/12/20-12:57:35.472716000}) = 0
lgetxattr("/var/tmp/systemd-private-22215545c29841db966225d8cddf4aff-ntpd.service-8fY4ZW/tmp", 
"security.selinux", 0x15e12a0, 255) = -1 ENODATA (No data available)
getxattr("/var/tmp/systemd-private-22215545c29841db966225d8cddf4aff-ntpd.service-8fY4ZW/tmp", 
"system.posix_acl_access", NULL, 0) = -1 ENODATA (No data available)
getxattr("/var/tmp/systemd-private-22215545c29841db966225d8cddf4aff-ntpd.service-8fY4ZW/tmp", 
"system.posix_acl_default", NULL, 0) = -1 ENODATA (No data available)
getdents(3, [], 32768)                  = 0
close(3)                                = 0
write(1, "total 4\n", 8total 4
)                = 8
stat("/etc/localtime", {st_dev=makedev(202, 1), st_ino=538370, 
st_mode=S_IFREG|0644, st_nlink=2, st_uid=0, st_gid=0, st_blksize=4096, 
st_blocks=8, st_size=2197, st_atime=2017/12/21-19:57:50.710656136, 
st_mtime=2017/10/25-22:11:30, st_ctime=2017/10/26-09:24:22.154125546}) = 
0
write(1, "drwxrwxrwt 2 root root 4096 Dec "..., 45drwxrwxrwt 2 root root 
4096 Dec 20 12:57 tmp
) = 45
openat(AT_FDCWD, 
"/var/tmp/systemd-private-2c7e05d7c51f4cea9bd21ad9e047b6f9-ntpd.service-LgnllP", 
O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 3
write(1, "\n", 1
)                       = 1
write(1, "/var/tmp/systemd-private-2c7e05d"..., 
79/var/tmp/systemd-private-2c7e05d7c51f4cea9bd21ad9e047b6f9-ntpd.service-LgnllP:
) = 79
getdents(3, [{d_ino=1048583, d_off=5473995461480594364, d_reclen=24, 
d_name="..", d_type=DT_DIR}, {d_ino=1454345, d_off=5474584235287975125, 
d_reclen=24, d_name=".", d_type=DT_DIR}, {d_ino=1454346, 
d_off=9223372036854775807, d_reclen=24, d_name="tmp", d_type=DT_DIR}], 
32768) = 72
lstat("/var/tmp/systemd-private-2c7e05d7c51f4cea9bd21ad9e047b6f9-ntpd.service-LgnllP/tmp", 
{st_dev=makedev(202, 1), st_ino=1454346, st_mode=S_IFDIR|S_ISVTX|0777, 
st_nlink=2, st_uid=0, st_gid=0, st_blksize=4096, st_blocks=8, 
st_size=4096, st_atime=2017/12/12-10:57:42.733684000, 
st_mtime=2017/12/12-10:57:42.733684000, 
st_ctime=2017/12/12-10:57:42.733684000}) = 0
lgetxattr("/var/tmp/systemd-private-2c7e05d7c51f4cea9bd21ad9e047b6f9-ntpd.service-LgnllP/tmp", 
"security.selinux", 0x15e12a0, 255) = -1 ENODATA (No data available)
getxattr("/var/tmp/systemd-private-2c7e05d7c51f4cea9bd21ad9e047b6f9-ntpd.service-LgnllP/tmp", 
"system.posix_acl_access", NULL, 0) = -1 ENODATA (No data available)
getxattr("/var/tmp/systemd-private-2c7e05d7c51f4cea9bd21ad9e047b6f9-ntpd.service-LgnllP/tmp", 
"system.posix_acl_default", NULL, 0) = -1 ENODATA (No data available)
getdents(3, [], 32768)                  = 0
close(3)                                = 0
write(1, "total 4\n", 8total 4
)                = 8
stat("/etc/localtime", {st_dev=makedev(202, 1), st_ino=538370, 
st_mode=S_IFREG|0644, st_nlink=2, st_uid=0, st_gid=0, st_blksize=4096, 
st_blocks=8, st_size=2197, st_atime=2017/12/21-19:57:50.710656136, 
st_mtime=2017/10/25-22:11:30, st_ctime=2017/10/26-09:24:22.154125546}) = 
0
write(1, "drwxrwxrwt 2 root root 4096 Dec "..., 45drwxrwxrwt 2 root root 
4096 Dec 12 10:57 tmp
) = 45
openat(AT_FDCWD, 
"/var/tmp/systemd-private-5ae7c40b551e4c5e81826da14aa582ce-ntpd.service-V3E1o1", 
O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 3
write(1, "\n", 1
)                       = 1
write(1, "/var/tmp/systemd-private-5ae7c40"..., 
79/var/tmp/systemd-private-5ae7c40b551e4c5e81826da14aa582ce-ntpd.service-V3E1o1:
) = 79
getdents(3, [{d_ino=1048583, d_off=5473995461480594364, d_reclen=24, 
d_name="..", d_type=DT_DIR}, {d_ino=1051375, d_off=5474584235287975125, 
d_reclen=24, d_name=".", d_type=DT_DIR}, {d_ino=1054396, 
d_off=9223372036854775807, d_reclen=24, d_name="tmp", d_type=DT_DIR}], 
32768) = 72
lstat("/var/tmp/systemd-private-5ae7c40b551e4c5e81826da14aa582ce-ntpd.service-V3E1o1/tmp", 
{st_dev=makedev(202, 1), st_ino=1054396, st_mode=S_IFDIR|S_ISVTX|0777, 
st_nlink=2, st_uid=0, st_gid=0, st_blksize=4096, st_blocks=8, 
st_size=4096, st_atime=2017/12/20-12:12:38.561900000, 
st_mtime=2017/12/20-12:12:38.561900000, 
st_ctime=2017/12/20-12:12:38.561900000}) = 0
lgetxattr("/var/tmp/systemd-private-5ae7c40b551e4c5e81826da14aa582ce-ntpd.service-V3E1o1/tmp", 
"security.selinux", 0x15e08a0, 255) = -1 ENODATA (No data available)
getxattr("/var/tmp/systemd-private-5ae7c40b551e4c5e81826da14aa582ce-ntpd.service-V3E1o1/tmp", 
"system.posix_acl_access", NULL, 0) = -1 ENODATA (No data available)
getxattr("/var/tmp/systemd-private-5ae7c40b551e4c5e81826da14aa582ce-ntpd.service-V3E1o1/tmp", 
"system.posix_acl_default", NULL, 0) = -1 ENODATA (No data available)
getdents(3, [], 32768)                  = 0
close(3)                                = 0
write(1, "total 4\n", 8total 4
)                = 8
stat("/etc/localtime", {st_dev=makedev(202, 1), st_ino=538370, 
st_mode=S_IFREG|0644, st_nlink=2, st_uid=0, st_gid=0, st_blksize=4096, 
st_blocks=8, st_size=2197, st_atime=2017/12/21-19:57:50.710656136, 
st_mtime=2017/10/25-22:11:30, st_ctime=2017/10/26-09:24:22.154125546}) = 
0
write(1, "drwxrwxrwt 2 root root 4096 Dec "..., 45drwxrwxrwt 2 root root 
4096 Dec 20 12:12 tmp
) = 45
openat(AT_FDCWD, 
"/var/tmp/systemd-private-6edef4a620334c5eaf22a8dae612bbeb-ntpd.service-Upo819", 
O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 3
write(1, "\n", 1
)                       = 1
write(1, "/var/tmp/systemd-private-6edef4a"..., 
79/var/tmp/systemd-private-6edef4a620334c5eaf22a8dae612bbeb-ntpd.service-Upo819:
) = 79
getdents(3, [{d_ino=1048583, d_off=5473995461480594364, d_reclen=24, 
d_name="..", d_type=DT_DIR}, {d_ino=1051978, d_off=5474584235287975125, 
d_reclen=24, d_name=".", d_type=DT_DIR}, {d_ino=1052375, 
d_off=9223372036854775807, d_reclen=24, d_name="tmp", d_type=DT_DIR}], 
32768) = 72
lstat("/var/tmp/systemd-private-6edef4a620334c5eaf22a8dae612bbeb-ntpd.service-Upo819/tmp", 
{st_dev=makedev(202, 1), st_ino=1052375, st_mode=S_IFDIR|S_ISVTX|0777, 
st_nlink=2, st_uid=0, st_gid=0, st_blksize=4096, st_blocks=8, 
st_size=4096, st_atime=2017/11/27-15:21:25.720273000, 
st_mtime=2017/11/27-15:21:25.720273000, 
st_ctime=2017/11/27-15:21:25.720273000}) = 0
lgetxattr("/var/tmp/systemd-private-6edef4a620334c5eaf22a8dae612bbeb-ntpd.service-Upo819/tmp", 
"security.selinux", 0x15e08a0, 255) = -1 ENODATA (No data available)
getxattr("/var/tmp/systemd-private-6edef4a620334c5eaf22a8dae612bbeb-ntpd.service-Upo819/tmp", 
"system.posix_acl_access", NULL, 0) = -1 ENODATA (No data available)
getxattr("/var/tmp/systemd-private-6edef4a620334c5eaf22a8dae612bbeb-ntpd.service-Upo819/tmp", 
"system.posix_acl_default", NULL, 0) = -1 ENODATA (No data available)
getdents(3, [], 32768)                  = 0
close(3)                                = 0
write(1, "total 4\n", 8total 4
)                = 8
stat("/etc/localtime", {st_dev=makedev(202, 1), st_ino=538370, 
st_mode=S_IFREG|0644, st_nlink=2, st_uid=0, st_gid=0, st_blksize=4096, 
st_blocks=8, st_size=2197, st_atime=2017/12/21-19:57:50.710656136, 
st_mtime=2017/10/25-22:11:30, st_ctime=2017/10/26-09:24:22.154125546}) = 
0
write(1, "drwxrwxrwt 2 root root 4096 Nov "..., 45drwxrwxrwt 2 root root 
4096 Nov 27 15:21 tmp
) = 45
openat(AT_FDCWD, 
"/var/tmp/systemd-private-8a2045497d51477ea7025d407e94528e-ntpd.service-CF2zs7", 
O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 3
write(1, "\n", 1
)                       = 1
write(1, "/var/tmp/systemd-private-8a20454"..., 
79/var/tmp/systemd-private-8a2045497d51477ea7025d407e94528e-ntpd.service-CF2zs7:
) = 79
getdents(3, [{d_ino=1048583, d_off=5473995461480594364, d_reclen=24, 
d_name="..", d_type=DT_DIR}, {d_ino=1454347, d_off=5474584235287975125, 
d_reclen=24, d_name=".", d_type=DT_DIR}, {d_ino=1454348, 
d_off=9223372036854775807, d_reclen=24, d_name="tmp", d_type=DT_DIR}], 
32768) = 72
lstat("/var/tmp/systemd-private-8a2045497d51477ea7025d407e94528e-ntpd.service-CF2zs7/tmp", 
{st_dev=makedev(202, 1), st_ino=1454348, st_mode=S_IFDIR|S_ISVTX|0777, 
st_nlink=2, st_uid=0, st_gid=0, st_blksize=4096, st_blocks=8, 
st_size=4096, st_atime=2017/12/12-11:20:20.265564000, 
st_mtime=2017/12/12-11:20:20.265564000, 
st_ctime=2017/12/12-11:20:20.265564000}) = 0
lgetxattr("/var/tmp/systemd-private-8a2045497d51477ea7025d407e94528e-ntpd.service-CF2zs7/tmp", 
"security.selinux", 0x15e08a0, 255) = -1 ENODATA (No data available)
getxattr("/var/tmp/systemd-private-8a2045497d51477ea7025d407e94528e-ntpd.service-CF2zs7/tmp", 
"system.posix_acl_access", NULL, 0) = -1 ENODATA (No data available)
getxattr("/var/tmp/systemd-private-8a2045497d51477ea7025d407e94528e-ntpd.service-CF2zs7/tmp", 
"system.posix_acl_default", NULL, 0) = -1 ENODATA (No data available)
getdents(3, [], 32768)                  = 0
close(3)                                = 0
write(1, "total 4\n", 8total 4
)                = 8
stat("/etc/localtime", {st_dev=makedev(202, 1), st_ino=538370, 
st_mode=S_IFREG|0644, st_nlink=2, st_uid=0, st_gid=0, st_blksize=4096, 
st_blocks=8, st_size=2197, st_atime=2017/12/21-19:57:50.710656136, 
st_mtime=2017/10/25-22:11:30, st_ctime=2017/10/26-09:24:22.154125546}) = 
0
write(1, "drwxrwxrwt 2 root root 4096 Dec "..., 45drwxrwxrwt 2 root root 
4096 Dec 12 11:20 tmp
) = 45
openat(AT_FDCWD, 
"/var/tmp/systemd-private-d86a2ca9a4a04b8184c7f74d22993c2e-ntpd.service-qCcBAF", 
O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 3
write(1, "\n", 1
)                       = 1
write(1, "/var/tmp/systemd-private-d86a2ca"..., 
79/var/tmp/systemd-private-d86a2ca9a4a04b8184c7f74d22993c2e-ntpd.service-qCcBAF:
) = 79
getdents(3, [{d_ino=1048583, d_off=5473995461480594364, d_reclen=24, 
d_name="..", d_type=DT_DIR}, {d_ino=1050290, d_off=5474584235287975125, 
d_reclen=24, d_name=".", d_type=DT_DIR}, {d_ino=1050456, 
d_off=9223372036854775807, d_reclen=24, d_name="tmp", d_type=DT_DIR}], 
32768) = 72
lstat("/var/tmp/systemd-private-d86a2ca9a4a04b8184c7f74d22993c2e-ntpd.service-qCcBAF/tmp", 
{st_dev=makedev(202, 1), st_ino=1050456, st_mode=S_IFDIR|S_ISVTX|0777, 
st_nlink=2, st_uid=0, st_gid=0, st_blksize=4096, st_blocks=8, 
st_size=4096, st_atime=2017/12/21-08:58:02.706436000, 
st_mtime=2017/12/21-08:58:02.706436000, 
st_ctime=2017/12/21-08:58:02.706436000}) = 0
lgetxattr("/var/tmp/systemd-private-d86a2ca9a4a04b8184c7f74d22993c2e-ntpd.service-qCcBAF/tmp", 
"security.selinux", 0x15e0cd0, 255) = -1 ENODATA (No data available)
getxattr("/var/tmp/systemd-private-d86a2ca9a4a04b8184c7f74d22993c2e-ntpd.service-qCcBAF/tmp", 
"system.posix_acl_access", NULL, 0) = -1 ENODATA (No data available)
getxattr("/var/tmp/systemd-private-d86a2ca9a4a04b8184c7f74d22993c2e-ntpd.service-qCcBAF/tmp", 
"system.posix_acl_default", NULL, 0) = -1 ENODATA (No data available)
getdents(3, [], 32768)                  = 0
close(3)                                = 0
write(1, "total 4\n", 8total 4
)                = 8
stat("/etc/localtime", {st_dev=makedev(202, 1), st_ino=538370, 
st_mode=S_IFREG|0644, st_nlink=2, st_uid=0, st_gid=0, st_blksize=4096, 
st_blocks=8, st_size=2197, st_atime=2017/12/21-19:57:50.710656136, 
st_mtime=2017/10/25-22:11:30, st_ctime=2017/10/26-09:24:22.154125546}) = 
0
write(1, "drwxrwxrwt 2 root root 4096 Dec "..., 45drwxrwxrwt 2 root root 
4096 Dec 21 08:58 tmp
) = 45
openat(AT_FDCWD, 
"/var/tmp/systemd-private-d9663d830437445b9bf063e123ff3128-ntpd.service-sVUmbJ", 
O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 3
write(1, "\n", 1
)                       = 1
write(1, "/var/tmp/systemd-private-d9663d8"..., 
79/var/tmp/systemd-private-d9663d830437445b9bf063e123ff3128-ntpd.service-sVUmbJ:
) = 79
getdents(3, [{d_ino=1048583, d_off=5473995461480594364, d_reclen=24, 
d_name="..", d_type=DT_DIR}, {d_ino=1198577, d_off=5474584235287975125, 
d_reclen=24, d_name=".", d_type=DT_DIR}, {d_ino=1198585, 
d_off=9223372036854775807, d_reclen=24, d_name="tmp", d_type=DT_DIR}], 
32768) = 72
lstat("/var/tmp/systemd-private-d9663d830437445b9bf063e123ff3128-ntpd.service-sVUmbJ/tmp", 
{st_dev=makedev(202, 1), st_ino=1198585, st_mode=S_IFDIR|S_ISVTX|0777, 
st_nlink=2, st_uid=0, st_gid=0, st_blksize=4096, st_blocks=8, 
st_size=4096, st_atime=2017/12/12-12:19:03.569441000, 
st_mtime=2017/12/12-12:19:03.569441000, 
st_ctime=2017/12/12-12:19:03.569441000}) = 0
lgetxattr("/var/tmp/systemd-private-d9663d830437445b9bf063e123ff3128-ntpd.service-sVUmbJ/tmp", 
"security.selinux", 0x15e0ca0, 255) = -1 ENODATA (No data available)
getxattr("/var/tmp/systemd-private-d9663d830437445b9bf063e123ff3128-ntpd.service-sVUmbJ/tmp", 
"system.posix_acl_access", NULL, 0) = -1 ENODATA (No data available)
getxattr("/var/tmp/systemd-private-d9663d830437445b9bf063e123ff3128-ntpd.service-sVUmbJ/tmp", 
"system.posix_acl_default", NULL, 0) = -1 ENODATA (No data available)
getdents(3, [], 32768)                  = 0
close(3)                                = 0
write(1, "total 4\n", 8total 4
)                = 8
stat("/etc/localtime", {st_dev=makedev(202, 1), st_ino=538370, 
st_mode=S_IFREG|0644, st_nlink=2, st_uid=0, st_gid=0, st_blksize=4096, 
st_blocks=8, st_size=2197, st_atime=2017/12/21-19:57:50.710656136, 
st_mtime=2017/10/25-22:11:30, st_ctime=2017/10/26-09:24:22.154125546}) = 
0
write(1, "drwxrwxrwt 2 root root 4096 Dec "..., 45drwxrwxrwt 2 root root 
4096 Dec 12 12:19 tmp
) = 45
close(1)                                = 0
munmap(0x7f93d7971000, 4096)            = 0
close(2)                                = 0
exit_group(0)                           = ?
+++ exited with 0 +++
---CUT HERE---

Please let me know what other information I should provide. Thanks,

---
Adi Pircalabu

Attachment: config-4.9.70-29.el7.x86_64.gz
Description: GNU Zip compressed data

Attachment: config-4.14.7-1.el7.elrepo.x86_64.gz
Description: GNU Zip compressed data

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