Xen devel - Jul 2011 - missing VM_IO (Xen 3.4 and Linux 3.0-rc5)

Good day.

Got this message from kernel:

[5748467.183247] ------------[ cut here ]------------
[5748467.183270] WARNING: at arch/x86/xen/mmu.c:492 
xen_make_pte_debug+0x9f/0x13
0()
[5748467.183280] 0x1df7b000 is missing VM_IO (and wasn''t fixed)!
[5748467.183289] Pid: 884, comm: blogd Not tainted 3.0.0-rc5+ #10
[5748467.183296] Call Trace:
[5748467.183306]  [<ffffffff81004caf>] ? xen_make_pte_debug+0x9f/0x130
[5748467.183318]  [<ffffffff81046e56>] ? warn_slowpath_common+0x76/0xc0
[5748467.183329]  [<ffffffff81046f15>] ? warn_slowpath_fmt+0x45/0x50
[5748467.183339]  [<ffffffff81029bb2>] ?
pvclock_clocksource_read+0x52/0xf0
[5748467.183350]  [<ffffffff81004caf>] ? xen_make_pte_debug+0x9f/0x130
[5748467.183361]  [<ffffffff810047db>] ? 
__raw_callee_save_xen_make_pte_debug+0x
11/0x1e
[5748467.183375]  [<ffffffff810e90c8>] ? mprotect_fixup+0x518/0x8d0
[5748467.183387]  [<ffffffff8102aea8>] ? do_page_fault+0x1c8/0x460
[5748467.183396]  [<ffffffff810e961a>] ? sys_mprotect+0x19a/0x260
[5748467.183408]  [<ffffffff813de9d2>] ? system_call_fastpath+0x16/0x1b
[5748467.183415] ---[ end trace 02c56baf98b43314 ]---
[5748467.328453] irqbalance[905]: segfault at 4 ip 00007fcb22cabdec sp 
00007fff8
8e32e60 error 6 in libc-2.11.2.so[7fcb22c10000+156000]
[5748467.183415] ---[ end trace 02c56baf98b43314 ]---
[5748467.328453] irqbalance[905]: segfault at 4 ip 00007fcb22cabdec sp 
00007fff8
8e32e60 error 6 in libc-2.11.2.so[7fcb22c10000+156000]
[5748509.028223] irqbalance[1037]: segfault at 4 ip 00007f8b03359dec sp 
00007fff
9f75ea40 error 6 in libc-2.11.2.so[7f8b032be000+156000]

kernel command line:

CPUFREQ=no root=/dev/xvda2 noapic nolapic loglevel=7 debug

kernel: 3.0-rc5, x86_64.
xen: 3.4 from XCP

kernel config in attachment




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On Sat, Jul 02, 2011 at 04:21:59AM +0400, George Shuklin
wrote:
> Good day.
> 
> Got this message from kernel:
> 
> [5748467.183247] ------------[ cut here ]------------
> [5748467.183270] WARNING: at arch/x86/xen/mmu.c:492
> xen_make_pte_debug+0x9f/0x13
> 0()
> [5748467.183280] 0x1df7b000 is missing VM_IO (and wasn''t fixed)!
> [5748467.183289] Pid: 884, comm: blogd Not tainted 3.0.0-rc5+ #10
> [5748467.183296] Call Trace:
> [5748467.183306]  [<ffffffff81004caf>] ?
xen_make_pte_debug+0x9f/0x130
> [5748467.183318]  [<ffffffff81046e56>] ?
warn_slowpath_common+0x76/0xc0
> [5748467.183329]  [<ffffffff81046f15>] ? warn_slowpath_fmt+0x45/0x50
> [5748467.183339]  [<ffffffff81029bb2>] ?
pvclock_clocksource_read+0x52/0xf0
> [5748467.183350]  [<ffffffff81004caf>] ?
xen_make_pte_debug+0x9f/0x130
> [5748467.183361]  [<ffffffff810047db>] ?
> __raw_callee_save_xen_make_pte_debug+0x
> 11/0x1e
> [5748467.183375]  [<ffffffff810e90c8>] ? mprotect_fixup+0x518/0x8d0
> [5748467.183387]  [<ffffffff8102aea8>] ? do_page_fault+0x1c8/0x460
> [5748467.183396]  [<ffffffff810e961a>] ? sys_mprotect+0x19a/0x260
> [5748467.183408]  [<ffffffff813de9d2>] ?
system_call_fastpath+0x16/0x1b
> [5748467.183415] ---[ end trace 02c56baf98b43314 ]---
> [5748467.328453] irqbalance[905]: segfault at 4 ip 00007fcb22cabdec
> sp 00007fff8
> 8e32e60 error 6 in libc-2.11.2.so[7fcb22c10000+156000]
> [5748467.183415] ---[ end trace 02c56baf98b43314 ]---
> [5748467.328453] irqbalance[905]: segfault at 4 ip 00007fcb22cabdec
> sp 00007fff8
> 8e32e60 error 6 in libc-2.11.2.so[7fcb22c10000+156000]
> [5748509.028223] irqbalance[1037]: segfault at 4 ip 00007f8b03359dec
> sp 00007fff
> 9f75ea40 error 6 in libc-2.11.2.so[7f8b032be000+156000]
> 
> kernel command line:
> 
> CPUFREQ=no root=/dev/xvda2 noapic nolapic loglevel=7 debug
You don''t need those ''CPUFREQ=no noapic nolapic''
options. Can you provide the
full log please. The irqbalance issue is an issue with irqbalance - if you
want that fixed try the attached patch.



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