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Re: Network driver domain broken

  • To: Jason Andryuk <jandryuk@xxxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>
  • From: Andrea Stevanato <andrea.stevanato@xxxxxxxxxxxxxxx>
  • Date: Fri, 4 Mar 2022 12:56:43 +0100
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  • Cc: "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>, "wl@xxxxxxx" <wl@xxxxxxx>, Anthony PERARD <anthony.perard@xxxxxxxxxx>
  • Delivery-date: Fri, 04 Mar 2022 11:56:52 +0000
  • List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 3/3/2022 7:08 PM, Jason Andryuk wrote:

On Thu, Mar 3, 2022 at 11:34 AM Roger Pau Monné <roger.pau@xxxxxxxxxx> wrote:


On Thu, Mar 03, 2022 at 05:01:23PM +0100, Andrea Stevanato wrote:

On 03/03/2022 15:54, Andrea Stevanato wrote:

Hi all,

according to the conversation that I had with royger, aa67b97ed34  broke the 
driver domain support.

What I'm trying to do is to setup networking between guests using driver 
domain. Therefore, the guest (driver) has been started with the following cfg.

name    = "guest0"
kernel  = "/media/sd-mmcblk0p1/Image"
ramdisk = "/media/sd-mmcblk0p1/rootfs.cpio.gz"
extra   = "console=hvc0 rdinit=/sbin/init root=/dev/ram0"
memory  = 1024 vcpus   = 2
driver_domain = 1

On guest0 I created the bridge, assigned a static IP and started the udhcpd on 
xenbr0 interface.
While the second guest has been started with the following cfg:

name    = "guest1"
kernel  = "/media/sd-mmcblk0p1/Image"
ramdisk = "/media/sd-mmcblk0p1/rootfs.cpio.gz"
extra   = "console=hvc0 rdinit=/sbin/init root=/dev/ram0"
memory  = 1024 vcpus   = 2
vcpus   = 2
vif = [ 'bridge=xenbr0, backend=guest0' ]

Follows the result of strace xl devd:

# strace xl devd
execve("/usr/sbin/xl", ["xl", "devd"], 0xffffdf0420c8 /* 13 vars */) = 0



ioctl(5, _IOC(_IOC_NONE, 0x50, 0, 0x30), 0xffffe6e41b40) = -1 EPERM (Operation 
not permitted)
write(2, "libxl: ", 7libxl: )                  = 7
write(2, "error: ", 7error: )                  = 7
write(2, "libxl_utils.c:820:libxl_cpu_bitm"..., 
87libxl_utils.c:820:libxl_cpu_bitmap_alloc: failed to retrieve the maximum number of 
cpus) = 87
write(2, "\n", 1
)                       = 1
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, 
child_tidptr=0xffff9ee7a0e0) = 814
wait4(814, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], 0, NULL) = 814
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=814, si_uid=0, 
si_status=0, si_utime=2, si_stime=2} ---


xl devd is daemonizing, but strace is only following the first
process.  Use `strace xl devd -F` to prevent the daemonizing (or
`strace -f xl devd` to follow children).


Sorry, I have not read this part.

# strace xl devd -F
execve("/usr/sbin/xl", ["xl", "devd", "-F"], 0xffffc53b6e50 /* 13 vars */) = 0 
brk(NULL)                               = 0xaaab058a0000
faccessat(AT_FDCWD, "/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) 
openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=7840, ...}) = 0
mmap(NULL, 7840, PROT_READ, MAP_PRIVATE, 3, 0) = 0xffff833c7000
close(3)                                = 0
openat(AT_FDCWD, "/usr/lib/libxlutil.so.4.14", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0\0200\0\0\0\0\0\0"..., 832) = 832 
fstat(3, {st_mode=S_IFREG|0755, st_size=68168, ...}) = 0
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xffff833c5000 mmap(NULL, 131784, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff83379000 
mprotect(0xffff83388000, 65536, PROT_NONE) = 0
mmap(0xffff83398000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0xf000) = 0xffff83398000 
close(3)                                = 0
openat(AT_FDCWD, "/usr/lib/libxenlight.so.4.14", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0`\16\2\0\0\0\0\0"..., 832) = 832 
fstat(3, {st_mode=S_IFREG|0755, st_size=861848, ...}) = 0
mmap(NULL, 925752, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff83296000 
mprotect(0xffff83363000, 61440, PROT_NONE) = 0
mmap(0xffff83372000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0xcc000) = 0xffff83372000 mmap(0xffff83378000, 56, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xffff83378000 
close(3)                                = 0
openat(AT_FDCWD, "/usr/lib/libxentoollog.so.1", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0P\r\0\0\0\0\0\0"..., 832) = 832 
fstat(3, {st_mode=S_IFREG|0755, st_size=10368, ...}) = 0
mmap(NULL, 73904, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff83283000 
mprotect(0xffff83285000, 61440, PROT_NONE) = 0
mmap(0xffff83294000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1000) = 0xffff83294000 
close(3)                                = 0
openat(AT_FDCWD, "/usr/lib/libyajl.so.2", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0\320\22\0\0\0\0\0\0"..., 832) = 832 
fstat(3, {st_mode=S_IFREG|0755, st_size=38728, ...}) = 0
mmap(NULL, 102416, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff83269000 
mprotect(0xffff83272000, 61440, PROT_NONE) = 0
mmap(0xffff83281000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x8000) = 0xffff83281000 
close(3)                                = 0
openat(AT_FDCWD, "/lib/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\267\0\1\0\0\0\300j\0\0\0\0\0\0"..., 832) = 832 
fstat(3, {st_mode=S_IFREG|0755, st_size=113184, ...}) = 0
mmap(NULL, 192872, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff83239000 
mprotect(0xffff83253000, 65536, PROT_NONE) = 0
mmap(0xffff83263000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1a000) = 0xffff83263000 mmap(0xffff83265000, 12648, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xffff83265000 
close(3)                                = 0
openat(AT_FDCWD, "/lib/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\267\0\1\0\0\0\320I\2\0\0\0\0\0"..., 832) = 832 
fstat(3, {st_mode=S_IFREG|0755, st_size=1428872, ...}) = 0
mmap(NULL, 1502000, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff830ca000 
mprotect(0xffff83221000, 61440, PROT_NONE) = 0
mmap(0xffff83230000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x156000) = 0xffff83230000 mmap(0xffff83236000, 11056, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xffff83236000 
close(3)                                = 0
openat(AT_FDCWD, "/usr/lib/libxenevtchn.so.1", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0@\f\0\0\0\0\0\0"..., 832) = 832 
fstat(3, {st_mode=S_IFREG|0755, st_size=10240, ...}) = 0
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xffff833c3000 mmap(NULL, 73856, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff830b7000 
mprotect(0xffff830b9000, 61440, PROT_NONE) = 0
mmap(0xffff830c8000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1000) = 0xffff830c8000 
close(3)                                = 0
openat(AT_FDCWD, "/usr/lib/libxenctrl.so.4.14", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0000\203\0\0\0\0\0\0"..., 832) = 832 
fstat(3, {st_mode=S_IFREG|0755, st_size=154752, ...}) = 0
mmap(NULL, 218504, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff83081000 
mprotect(0xffff830a6000, 61440, PROT_NONE) = 0
mmap(0xffff830b5000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x24000) = 0xffff830b5000 
close(3)                                = 0
openat(AT_FDCWD, "/usr/lib/libxenguest.so.4.14", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0PB\0\0\0\0\0\0"..., 832) = 832 
fstat(3, {st_mode=S_IFREG|0755, st_size=77248, ...}) = 0
mmap(NULL, 140880, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff8305e000 
mprotect(0xffff83070000, 61440, PROT_NONE) = 0
mmap(0xffff8307f000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x11000) = 0xffff8307f000 
close(3)                                = 0
openat(AT_FDCWD, "/usr/lib/libxenhypfs.so.1", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0\300\16\0\0\0\0\0\0"..., 832) = 832 
fstat(3, {st_mode=S_IFREG|0755, st_size=14432, ...}) = 0
mmap(NULL, 78048, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff8304a000 
mprotect(0xffff8304c000, 65536, PROT_NONE) = 0
mmap(0xffff8305c000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0xffff8305c000 
close(3)                                = 0
openat(AT_FDCWD, "/usr/lib/libxenstore.so.3.0", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0 $\0\0\0\0\0\0"..., 832) = 832 
fstat(3, {st_mode=S_IFREG|0755, st_size=31176, ...}) = 0
mmap(NULL, 107088, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff8302f000 
mprotect(0xffff83035000, 65536, PROT_NONE) = 0
mmap(0xffff83045000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x6000) = 0xffff83045000 mmap(0xffff83047000, 8784, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xffff83047000 
close(3)                                = 0
openat(AT_FDCWD, "/lib/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\267\0\1\0\0\0@\20\0\0\0\0\0\0"..., 832) = 832 
fstat(3, {st_mode=S_IFREG|0755, st_size=14296, ...}) = 0
mmap(NULL, 77920, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff8301b000 
mprotect(0xffff8301e000, 61440, PROT_NONE) = 0
mmap(0xffff8302d000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0xffff8302d000 
close(3)                                = 0
openat(AT_FDCWD, "/usr/lib/libxentoolcore.so.1", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0 \10\0\0\0\0\0\0"..., 832) = 832 
fstat(3, {st_mode=S_IFREG|0755, st_size=6104, ...}) = 0
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xffff833c1000 mmap(NULL, 69768, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff83009000 
mprotect(0xffff8300a000, 61440, PROT_NONE) = 0
mmap(0xffff83019000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0) = 0xffff83019000 
close(3)                                = 0
openat(AT_FDCWD, "/lib/libutil.so.1", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0`\21\0\0\0\0\0\0"..., 832) = 832 
fstat(3, {st_mode=S_IFREG|0755, st_size=14296, ...}) = 0
mmap(NULL, 77840, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff82ff5000 
mprotect(0xffff82ff7000, 65536, PROT_NONE) = 0
mmap(0xffff83007000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0xffff83007000 
close(3)                                = 0
openat(AT_FDCWD, "/lib/libuuid.so.1", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0000\30\0\0\0\0\0\0"..., 832) = 832 
fstat(3, {st_mode=S_IFREG|0755, st_size=30680, ...}) = 0
mmap(NULL, 94240, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff82fdd000 
mprotect(0xffff82fe3000, 65536, PROT_NONE) = 0
mmap(0xffff82ff3000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x6000) = 0xffff82ff3000 
close(3)                                = 0
openat(AT_FDCWD, "/usr/lib/libnl-route-3.so.200", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0\200\327\1\0\0\0\0\0"..., 832) = 832 
fstat(3, {st_mode=S_IFREG|0755, st_size=536688, ...}) = 0
mmap(NULL, 609024, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff82f48000 
mprotect(0xffff82fc3000, 65536, PROT_NONE) = 0
mmap(0xffff82fd3000, 32768, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x7b000) = 0xffff82fd3000 mmap(0xffff82fdb000, 6912, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xffff82fdb000 
close(3)                                = 0
openat(AT_FDCWD, "/usr/lib/libnl-3.so.200", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0\360\221\0\0\0\0\0\0"..., 832) = 832 
fstat(3, {st_mode=S_IFREG|0755, st_size=141304, ...}) = 0
mmap(NULL, 205192, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff82f15000 
mprotect(0xffff82f36000, 61440, PROT_NONE) = 0
mmap(0xffff82f45000, 12288, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x20000) = 0xffff82f45000 
close(3)                                = 0
openat(AT_FDCWD, "/lib/librt.so.1", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0\0#\0\0\0\0\0\0"..., 832) = 832 
fstat(3, {st_mode=S_IFREG|0755, st_size=31032, ...}) = 0
mmap(NULL, 94568, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff82efd000 
mprotect(0xffff82f04000, 61440, PROT_NONE) = 0
mmap(0xffff82f13000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x6000) = 0xffff82f13000 
close(3)                                = 0
openat(AT_FDCWD, "/usr/lib/libfdt.so.1", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0000#\0\0\0\0\0\0"..., 832) = 832 
fstat(3, {st_mode=S_IFREG|0755, st_size=38800, ...}) = 0
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xffff833bf000 mmap(NULL, 102416, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff82ee3000 
mprotect(0xffff82eec000, 61440, PROT_NONE) = 0
mmap(0xffff82efb000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x8000) = 0xffff82efb000 
close(3)                                = 0
openat(AT_FDCWD, "/usr/lib/libxengnttab.so.1", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0`\20\0\0\0\0\0\0"..., 832) = 832 
fstat(3, {st_mode=S_IFREG|0755, st_size=14368, ...}) = 0
mmap(NULL, 77984, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff82ecf000 
mprotect(0xffff82ed2000, 61440, PROT_NONE) = 0
mmap(0xffff82ee1000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0xffff82ee1000 
close(3)                                = 0
openat(AT_FDCWD, "/usr/lib/libxencall.so.1", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0\320\17\0\0\0\0\0\0"..., 832) = 832 
fstat(3, {st_mode=S_IFREG|0755, st_size=14400, ...}) = 0
mmap(NULL, 78064, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff82ebb000 
mprotect(0xffff82ebe000, 61440, PROT_NONE) = 0
mmap(0xffff82ecd000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0xffff82ecd000 
close(3)                                = 0
openat(AT_FDCWD, "/usr/lib/libxenforeignmemory.so.1", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0000\16\0\0\0\0\0\0"..., 832) = 832 
fstat(3, {st_mode=S_IFREG|0755, st_size=14392, ...}) = 0
mmap(NULL, 78000, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff82ea7000 
mprotect(0xffff82ea9000, 65536, PROT_NONE) = 0
mmap(0xffff82eb9000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0xffff82eb9000 
close(3)                                = 0
openat(AT_FDCWD, "/usr/lib/libxendevicemodel.so.1", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0`\23\0\0\0\0\0\0"..., 832) = 832 
fstat(3, {st_mode=S_IFREG|0755, st_size=14400, ...}) = 0
mmap(NULL, 78008, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff82e93000 
mprotect(0xffff82e96000, 61440, PROT_NONE) = 0
mmap(0xffff82ea5000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0xffff82ea5000 
close(3)                                = 0
openat(AT_FDCWD, "/usr/lib/libbz2.so.1", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0\320\27\0\0\0\0\0\0"..., 832) = 832 
fstat(3, {st_mode=S_IFREG|0755, st_size=70472, ...}) = 0
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xffff833bd000 mmap(NULL, 134160, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff82e72000 
mprotect(0xffff82e82000, 61440, PROT_NONE) = 0
mmap(0xffff82e91000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0xf000) = 0xffff82e91000 
close(3)                                = 0
openat(AT_FDCWD, "/usr/lib/liblzma.so.5", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0\3403\0\0\0\0\0\0"..., 832) = 832 
fstat(3, {st_mode=S_IFREG|0755, st_size=153496, ...}) = 0
mmap(NULL, 217104, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff82e3c000 
mprotect(0xffff82e60000, 65536, PROT_NONE) = 0
mmap(0xffff82e70000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x24000) = 0xffff82e70000 
close(3)                                = 0
openat(AT_FDCWD, "/usr/lib/liblzo2.so.2", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0\320&\0\0\0\0\0\0"..., 832) = 832 
fstat(3, {st_mode=S_IFREG|0755, st_size=120648, ...}) = 0
mmap(NULL, 184336, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff82e0e000 
mprotect(0xffff82e2b000, 61440, PROT_NONE) = 0
mmap(0xffff82e3a000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1c000) = 0xffff82e3a000 
close(3)                                = 0
openat(AT_FDCWD, "/lib/libz.so.1", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0\360%\0\0\0\0\0\0"..., 832) = 832 
fstat(3, {st_mode=S_IFREG|0755, st_size=92056, ...}) = 0
mmap(NULL, 155664, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff82de7000 
mprotect(0xffff82dfc000, 65536, PROT_NONE) = 0
mmap(0xffff82e0c000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x15000) = 0xffff82e0c000 
close(3)                                = 0
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xffff82de5000 mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xffff82de3000 
mprotect(0xffff83230000, 12288, PROT_READ) = 0
mprotect(0xffff82e0c000, 4096, PROT_READ) = 0
mprotect(0xffff82e3a000, 4096, PROT_READ) = 0
mprotect(0xffff83263000, 4096, PROT_READ) = 0
mprotect(0xffff82e70000, 4096, PROT_READ) = 0
mprotect(0xffff82e91000, 4096, PROT_READ) = 0
mprotect(0xffff83294000, 4096, PROT_READ) = 0
mprotect(0xffff83019000, 4096, PROT_READ) = 0
mprotect(0xffff82ecd000, 4096, PROT_READ) = 0
mprotect(0xffff82ea5000, 4096, PROT_READ) = 0
mprotect(0xffff82eb9000, 4096, PROT_READ) = 0
mprotect(0xffff82ee1000, 4096, PROT_READ) = 0
mprotect(0xffff82efb000, 4096, PROT_READ) = 0
mprotect(0xffff82f13000, 4096, PROT_READ) = 0
mprotect(0xffff82f45000, 8192, PROT_READ) = 0
mprotect(0xffff82fd3000, 16384, PROT_READ) = 0
mprotect(0xffff82ff3000, 4096, PROT_READ) = 0
mprotect(0xffff83007000, 4096, PROT_READ) = 0
mprotect(0xffff8302d000, 4096, PROT_READ) = 0
mprotect(0xffff83045000, 4096, PROT_READ) = 0
mprotect(0xffff8305c000, 4096, PROT_READ) = 0
mprotect(0xffff830c8000, 4096, PROT_READ) = 0
mprotect(0xffff830b5000, 4096, PROT_READ) = 0
mprotect(0xffff8307f000, 4096, PROT_READ) = 0
mprotect(0xffff83281000, 4096, PROT_READ) = 0
mprotect(0xffff83372000, 8192, PROT_READ) = 0
mprotect(0xffff83398000, 4096, PROT_READ) = 0
mprotect(0xaaaac7570000, 4096, PROT_READ) = 0
mprotect(0xffff833cc000, 4096, PROT_READ) = 0
munmap(0xffff833c7000, 7840)            = 0
set_tid_address(0xffff82de30e0)         = 767
set_robust_list(0xffff82de30f0, 24)     = 0
rt_sigaction(SIGRTMIN, {sa_handler=0xffff8323f570, sa_mask=[], sa_flags=SA_SIGINFO}, NULL, 8) = 0 rt_sigaction(SIGRT_1, {sa_handler=0xffff8323f630, sa_mask=[], sa_flags=SA_RESTART|SA_SIGINFO}, NULL, 8) = 0 
rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0
prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 
brk(NULL)                               = 0xaaab058a0000
brk(0xaaab058c1000)                     = 0xaaab058c1000
newfstatat(AT_FDCWD, "/etc/libnl/classid", {st_mode=S_IFREG|0644, st_size=1130, ...}, 0) = 0 
openat(AT_FDCWD, "/etc/libnl/classid", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=1130, ...}) = 0
read(3, "################################"..., 4096) = 1130
read(3, "", 4096)                       = 0
close(3)                                = 0
ioctl(2, TCGETS, 0xffffdf6a4f18) = -1 ENOTTY (Inappropriate ioctl for device) 
pipe2([3, 4], 0)                        = 0
fcntl(3, F_GETFL)                       = 0 (flags O_RDONLY)
fcntl(3, F_SETFL, O_RDONLY|O_NONBLOCK)  = 0
fcntl(4, F_GETFL)                       = 0x1 (flags O_WRONLY)
fcntl(4, F_SETFL, O_WRONLY|O_NONBLOCK)  = 0
openat(AT_FDCWD, "/dev/xen/privcmd", O_RDWR|O_CLOEXEC) = 5
openat(AT_FDCWD, "/dev/xen/hypercall", O_RDWR|O_CLOEXEC) = 6
openat(AT_FDCWD, "/dev/xen/privcmd", O_RDWR|O_CLOEXEC) = 7
ioctl(7, _IOC(_IOC_NONE, 0x50, 0xff, 0), 0) = -1 ENOTTY (Inappropriate ioctl for device) 
openat(AT_FDCWD, "/dev/xen/privcmd", O_RDWR|O_CLOEXEC) = 8
openat(AT_FDCWD, "/dev/xen/hypercall", O_RDWR|O_CLOEXEC) = 9
openat(AT_FDCWD, "/dev/xen/privcmd", O_RDWR|O_CLOEXEC) = 10
ioctl(10, _IOC(_IOC_NONE, 0x50, 0x5, 0x10), 0xffffdf6a4aa0) = 0
newfstatat(AT_FDCWD, "/var/run/xenstored/socket", 0xffffdf6a4ed0, 0) = -1 ENOENT (No such file or directory) 
faccessat(AT_FDCWD, "/dev/xen/xenbus", F_OK) = 0
newfstatat(AT_FDCWD, "/dev/xen/xenbus", {st_mode=S_IFCHR|0600, st_rdev=makedev(0xa, 0x3e), ...}, 0) = 0 
openat(AT_FDCWD, "/dev/xen/xenbus", O_RDWR) = 11
openat(AT_FDCWD, "/etc/xen/xl.conf", O_RDONLY) = 12
fstat(12, {st_mode=S_IFREG|0644, st_size=1602, ...}) = 0
fstat(12, {st_mode=S_IFREG|0644, st_size=1602, ...}) = 0
read(12, "## Global XL config file ##\n\n# S"..., 4096) = 1602
close(12)                               = 0
ioctl(5, _IOC(_IOC_NONE, 0x50, 0, 0x30), 0xffffdf6a4b00) = 262158
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_SHARED, 6, 0) = 0xffff833c8000
ioctl(5, _IOC(_IOC_NONE, 0x50, 0, 0x30), 0xffffdf6a4b00) = 0
ioctl(5, _IOC(_IOC_NONE, 0x50, 0, 0x30), 0xffffdf6a4b00) = 0
ioctl(5, _IOC(_IOC_NONE, 0x50, 0, 0x30), 0xffffdf6a4b00) = 0
ioctl(5, _IOC(_IOC_NONE, 0x50, 0, 0x30), 0xffffdf6a4b00) = 0
ioctl(5, _IOC(_IOC_NONE, 0x50, 0, 0x30), 0xffffdf6a4b00) = 0
ioctl(5, _IOC(_IOC_NONE, 0x50, 0, 0x30), 0xffffdf6a4b00) = 4096
ioctl(5, _IOC(_IOC_NONE, 0x50, 0, 0x30), 0xffffdf6a4b00) = 0
ioctl(5, _IOC(_IOC_NONE, 0x50, 0, 0x30), 0xffffdf6a4ad0) = -1 EPERM (Operation not permitted) ioctl(5, _IOC(_IOC_NONE, 0x50, 0, 0x30), 0xffffdf6a4df0) = -1 EPERM (Operation not permitted) 
write(2, "libxl: ", 7libxl: )                  = 7
write(2, "error: ", 7error: )                  = 7
write(2, "libxl_utils.c:820:libxl_cpu_bitm"..., 87libxl_utils.c:820:libxl_cpu_bitmap_alloc: failed to retrieve the maximum number of cpus) = 87 
write(2, "\n", 1
)                       = 1
ioctl(5, _IOC(_IOC_NONE, 0x50, 0, 0x30), 0xffffdf6a4df0) = -1 EPERM (Operation not permitted) 
write(2, "libxl: ", 7libxl: )                  = 7
write(2, "error: ", 7error: )                  = 7
write(2, "libxl_utils.c:820:libxl_cpu_bitm"..., 87libxl_utils.c:820:libxl_cpu_bitmap_alloc: failed to retrieve the maximum number of cpus) = 87 
write(2, "\n", 1
)                       = 1
ioctl(5, _IOC(_IOC_NONE, 0x50, 0, 0x30), 0xffffdf6a4df0) = -1 EPERM (Operation not permitted) 
write(2, "libxl: ", 7libxl: )                  = 7
write(2, "error: ", 7error: )                  = 7
write(2, "libxl_utils.c:820:libxl_cpu_bitm"..., 87libxl_utils.c:820:libxl_cpu_bitmap_alloc: failed to retrieve the maximum number of cpus) = 87 
write(2, "\n", 1
)                       = 1
pipe2([12, 13], 0)                      = 0
fcntl(12, F_GETFL)                      = 0 (flags O_RDONLY)
fcntl(12, F_SETFL, O_RDONLY|O_NONBLOCK) = 0
fcntl(13, F_GETFL)                      = 0x1 (flags O_WRONLY)
fcntl(13, F_SETFL, O_WRONLY|O_NONBLOCK) = 0
rt_sigaction(SIGPIPE, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0 
write(11, "\2\0\0\0\0\0\0\0\0\0\0\0\6\0\0\0", 16) = 16
write(11, "domid\0", 6)                 = 6
read(11, "\2\0\0\0\0\0\0\0\0\0\0\0\1\0\0\0", 16) = 16
read(11, "1", 1)                        = 1
rt_sigaction(SIGPIPE, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, NULL, 8) = 0 
pipe2([14, 15], 0)                      = 0
futex(0xffff8302e048, FUTEX_WAKE_PRIVATE, 2147483647) = 0
rt_sigprocmask(SIG_SETMASK, ~[RTMIN RT_1], [], 8) = 0
mmap(NULL, 141168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0xffff82dc0000 
mprotect(0xffff82dc1000, 137072, PROT_READ|PROT_WRITE) = 0
rt_sigprocmask(SIG_BLOCK, ~[], ~[KILL STOP RTMIN RT_1], 8) = 0
clone(child_stack=0xffff82de10e0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[768], tls=0xffff82de2000, child_tidptr=0xffff82de1940) = 768 
rt_sigprocmask(SIG_SETMASK, ~[KILL STOP RTMIN RT_1], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigaction(SIGPIPE, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0 
write(11, "\4\0\0\0\0\0\0\0\0\0\0\0\34\0\0\0", 16) = 16
write(11, "/local/domain/1/backend\0", 24) = 24
write(11, "3/0\0", 4)                   = 4
rt_sigaction(SIGPIPE, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, NULL, 8) = 0 rt_sigaction(SIGPIPE, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0 
write(11, "\1\0\0\0\0\0\0\0\0\0\0\0\30\0\0\0", 16) = 16
write(11, "/local/domain/1/backend\0", 24) = 24
futex(0xaaab058a13b8, FUTEX_WAIT_PRIVATE, 0, NULL) = 0
futex(0xaaab058a1360, FUTEX_WAKE_PRIVATE, 1) = 0
rt_sigaction(SIGPIPE, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, NULL, 8) = 0 ppoll([{fd=14, events=POLLIN}, {fd=12, events=POLLIN}], 2, NULL, NULL, 0) = 1 ([{fd=14, revents=POLLIN}]) ppoll([{fd=14, events=POLLIN}], 1, {tv_sec=0, tv_nsec=0}, NULL, 0) = 1 ([{fd=14, revents=POLLIN}], left {tv_sec=0, tv_nsec=0}) 
read(14, "/", 1)                        = 1
ppoll([{fd=14, events=POLLIN}, {fd=12, events=POLLIN}], 2, NULL, NULL, 0strace: Process 767 detached 
 <detached ...>


close(6)                                = 0
close(5)                                = 0
munmap(0xffff9f45f000, 4096)            = 0
close(7)                                = 0
close(10)                               = 0
close(9)                                = 0
close(8)                                = 0
close(11)                               = 0
close(3)                                = 0
close(4)                                = 0
exit_group(0)                           = ?
+++ exited with 0 +++

royger told me that it is a BUG and not an issue with my setup. Therefore here 
I am.


Just a bit more context: AFAICT the calls to libxl_cpu_bitmap_alloc in
parse_global_config will prevent xl from being usable on anything
different than the control domain (due to sysctl only available to
privileged domains). This is an issue for 'xl devd', as it won't
start anymore.


These look non-fatal at first glance?

Regards,
Jason


Andrea

 

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