[Xen-devel] dom0 PVH: Over-allocation for domain 0: 393217 > 393216

[Sander Eikelenboom <linux@xxxxxxxxxxxxxx>]

Hi,

I just tried booting with "dom0pvh" and found the following warnings (complete 
combined xl-dmesg/dmesg attached) which don't show up when booting without 
dom0pvh:

(XEN) [2014-06-03 12:00:38] page_alloc.c:1465:d0v0 Over-allocation for domain 
0: 393217 > 393216
(XEN) [2014-06-03 12:00:38] memory.c:158:d0v0 Could not allocate order=0 
extent: id=0 memflags=0 (0 of 1)
[    0.000000] Initializing cgroup subsys cpuset
[    0.000000] Initializing cgroup subsys cpu
[    0.000000] Initializing cgroup subsys cpuacct
[    0.000000] Linux version 3.15.0-rc8-20140603-intelserver+ (root@rekenbeest) 
(gcc version 4.7.2 (Debian 4.7.2-5) ) #1 SMP Tue Jun 3 11:47:16 CEST 2014
[    0.000000] Command line: root=UUID=62eead45-148e-47b3-82b7-3eff2057b2b2 ro 
verbose earlyprintk=xen console=hvc0 console=tty0
[    0.000000] Released 102 pages of unused memory
[    0.000000] Set 403200 page(s) to 1-1 mapping
[    0.000000] ------------[ cut here ]------------
[    0.000000] WARNING: CPU: 0 PID: 0 at arch/x86/xen/setup.c:134 
xen_do_chunk+0x188/0x241()
[    0.000000] Failed to populate pfn 60000 err=0
[    0.000000] Modules linked in:
[    0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted 
3.15.0-rc8-20140603-intelserver+ #1
[    0.000000]  0000000000000000 0000000000000009 ffffffff8155c30c 
ffffffff81a03ce8
[    0.000000]  ffffffff8104b8b7 ffffffff8107d1c0 ffffffff81af65d7 
ffffffff81a41ba0
[    0.000000]  0000000000060000 0000000000000000 0000000000000000 
0000000000060001
[    0.000000] Call Trace:
[    0.000000]  [<ffffffff8155c30c>] ? dump_stack+0x41/0x51
[    0.000000]  [<ffffffff8104b8b7>] ? warn_slowpath_common+0x78/0x90
[    0.000000]  [<ffffffff8107d1c0>] ? arch_local_irq_restore+0x13/0x14
[    0.000000]  [<ffffffff81af65d7>] ? xen_do_chunk+0x188/0x241
[    0.000000]  [<ffffffff8104b967>] ? warn_slowpath_fmt+0x45/0x4a
[    0.000000]  [<ffffffff8107d1d4>] ? arch_local_irq_disable+0x13/0x14
[    0.000000]  [<ffffffff81af65d7>] ? xen_do_chunk+0x188/0x241
[    0.000000]  [<ffffffff81af69ec>] ? xen_memory_setup+0x35c/0x698
[    0.000000]  [<ffffffff8107d1c0>] ? arch_local_irq_restore+0x13/0x14
[    0.000000]  [<ffffffff8101c27a>] ? paravirt_read_msr+0x15/0x16
[    0.000000]  [<ffffffff81afc867>] ? setup_memory_map+0x7/0x39
[    0.000000]  [<ffffffff81afa3ce>] ? setup_arch+0x1b2/0xc94
[    0.000000]  [<ffffffff81558176>] ? printk+0x4f/0x54
[    0.000000]  [<ffffffff8139cdb4>] ? dom0_write_console+0x12/0x18
[    0.000000]  [<ffffffff81af3aa6>] ? start_kernel+0xbe/0x3fe
[    0.000000]  [<ffffffff81af633e>] ? xen_start_kernel+0x4ed/0x4f6
[    0.000000] ---[ end trace cf9414bcd9c5d9a0 ]---

I do restrict dom0's mem on the xen commandline in grub:

multiboot       /boot/xen-4.5-unstable.gz dom0_mem=1536M,max:1536M loglvl=all 
loglvl_guest=all console_timestamps console_to_ring vga=gfx-1024x768x32 cpuidle 
cpufreq=xen debug com1=38400,8n1 console=vga,com1
module          /boot/vmlinuz-3.15.0-rc8-20140603-intelserver+ 
root=UUID=62eead45-148e-47b3-82b7-3eff2057b2b2 ro verbose earlyprintk=xen 
console=hvc0 console=tty0
  
Xen version:    xen-unstable, xen_changeset: Tue Jun 3 12:02:11 2014 +0200 
git:08178cd
Kernel:         tree: linus, branch: next, last commit: 
a727eaf64ff084a50b983fc506810c7a576b7ce3 (so it has the patches of David's 3.16 
pull request)

--
Sander


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