* [BUG] Bad page map in process after migration (Debian #711249)
@ 2013-06-11 16:44 Ian Campbell
2013-06-11 17:01 ` konrad wilk
0 siblings, 1 reply; 3+ messages in thread
From: Ian Campbell @ 2013-06-11 16:44 UTC (permalink / raw)
To: xen-devel; +Cc: Konrad Rzeszutek Wilk
A Debian user has reported this with the 3.2 kernel, it sounds vaguely
familiar, but neither I nor google can quite put my finger on it. Does
it ring any bells?
[1295549.783990] BUG: Bad page map in process java pte:00000166 pmd:3bacb067
[1295549.784005] page:ffffea0000000000 count:-1 mapcount:-128 mapping: (null) index:0x0
[1295549.784036] page flags: 0x14(referenced|dirty)
[1295549.784044] addr:00007f879a6a2000 vm_flags:00100077 anon_vma:ffff88003cb472a0 mapping: (null) index:7f879a6a2
[1295549.784052] Pid: 13198, comm: java Not tainted 3.2.0-4-amd64 #1 Debian 3.2.41-2+deb7u2
[1295549.784058] Call Trace:
[1295549.784070] [<ffffffff810ce1f5>] ? print_bad_pte+0x1a5/0x1bd
[1295549.784075] [<ffffffff810cde55>] ? pte_pfn+0x5/0xe
[1295549.784083] [<ffffffff810cfe5c>] ? unmap_vmas+0x4d5/0x6ca
[1295549.784095] [<ffffffff810d00e1>] ? zap_page_range+0x90/0xb8
[1295549.784108] [<ffffffff810d5ce0>] ? mmap_region+0x353/0x44a
[1295549.784122] [<ffffffff81036428>] ? should_resched+0x5/0x23
[1295549.784133] [<ffffffff810cdba2>] ? sys_madvise+0x3d2/0x5fc
[1295549.784147] [<ffffffff81053e6c>] ? recalc_sigpending+0x23/0x3c
[1295549.784156] [<ffffffff81054518>] ? __set_task_blocked+0x5e/0x65
[1295549.784168] [<ffffffff81052e40>] ? spin_unlock_irq+0xa/0xb
[1295549.784178] [<ffffffff8105601c>] ? sigprocmask+0x5c/0x63
[1295549.784191] [<ffffffff813529d2>] ? system_call_fastpath+0x16/0x1b
[1295549.784201] Disabling lock debugging due to kernel taint
There's a bit more info and a full dmesg in
http://bugs.debian.org/711249
Cheers,
Ian.
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [BUG] Bad page map in process after migration (Debian #711249)
2013-06-11 16:44 [BUG] Bad page map in process after migration (Debian #711249) Ian Campbell
@ 2013-06-11 17:01 ` konrad wilk
2013-06-11 17:22 ` Boris Ostrovsky
0 siblings, 1 reply; 3+ messages in thread
From: konrad wilk @ 2013-06-11 17:01 UTC (permalink / raw)
To: Ian Campbell; +Cc: Boris Ostrovsky, xen-devel
On 6/11/2013 12:44 PM, Ian Campbell wrote:
> A Debian user has reported this with the 3.2 kernel, it sounds vaguely
> familiar, but neither I nor google can quite put my finger on it. Does
> it ring any bells?
>
> [1295549.783990] BUG: Bad page map in process java pte:00000166 pmd:3bacb067
> [1295549.784005] page:ffffea0000000000 count:-1 mapcount:-128 mapping: (null) index:0x0
> [1295549.784036] page flags: 0x14(referenced|dirty)
> [1295549.784044] addr:00007f879a6a2000 vm_flags:00100077 anon_vma:ffff88003cb472a0 mapping: (null) index:7f879a6a2
> [1295549.784052] Pid: 13198, comm: java Not tainted 3.2.0-4-amd64 #1 Debian 3.2.41-2+deb7u2
> [1295549.784058] Call Trace:
> [1295549.784070] [<ffffffff810ce1f5>] ? print_bad_pte+0x1a5/0x1bd
> [1295549.784075] [<ffffffff810cde55>] ? pte_pfn+0x5/0xe
> [1295549.784083] [<ffffffff810cfe5c>] ? unmap_vmas+0x4d5/0x6ca
> [1295549.784095] [<ffffffff810d00e1>] ? zap_page_range+0x90/0xb8
> [1295549.784108] [<ffffffff810d5ce0>] ? mmap_region+0x353/0x44a
> [1295549.784122] [<ffffffff81036428>] ? should_resched+0x5/0x23
> [1295549.784133] [<ffffffff810cdba2>] ? sys_madvise+0x3d2/0x5fc
> [1295549.784147] [<ffffffff81053e6c>] ? recalc_sigpending+0x23/0x3c
> [1295549.784156] [<ffffffff81054518>] ? __set_task_blocked+0x5e/0x65
> [1295549.784168] [<ffffffff81052e40>] ? spin_unlock_irq+0xa/0xb
> [1295549.784178] [<ffffffff8105601c>] ? sigprocmask+0x5c/0x63
> [1295549.784191] [<ffffffff813529d2>] ? system_call_fastpath+0x16/0x1b
> [1295549.784201] Disabling lock debugging due to kernel taint
>
> There's a bit more info and a full dmesg in
> http://bugs.debian.org/711249
Thank you.
Boris,
Did you fix a similar issue in v3.9? There was the cgroup one which I
thought had a similar back-track?
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [BUG] Bad page map in process after migration (Debian #711249)
2013-06-11 17:01 ` konrad wilk
@ 2013-06-11 17:22 ` Boris Ostrovsky
0 siblings, 0 replies; 3+ messages in thread
From: Boris Ostrovsky @ 2013-06-11 17:22 UTC (permalink / raw)
To: konrad wilk; +Cc: Ian Campbell, xen-devel
On 06/11/2013 01:01 PM, konrad wilk wrote:
>
> On 6/11/2013 12:44 PM, Ian Campbell wrote:
>> A Debian user has reported this with the 3.2 kernel, it sounds vaguely
>> familiar, but neither I nor google can quite put my finger on it. Does
>> it ring any bells?
>>
>> [1295549.783990] BUG: Bad page map in process java
>> pte:00000166 pmd:3bacb067
>> [1295549.784005] page:ffffea0000000000 count:-1
>> mapcount:-128 mapping: (null) index:0x0
>> [1295549.784036] page flags: 0x14(referenced|dirty)
>> [1295549.784044] addr:00007f879a6a2000 vm_flags:00100077
>> anon_vma:ffff88003cb472a0 mapping: (null) index:7f879a6a2
>> [1295549.784052] Pid: 13198, comm: java Not tainted
>> 3.2.0-4-amd64 #1 Debian 3.2.41-2+deb7u2
>> [1295549.784058] Call Trace:
>> [1295549.784070] [<ffffffff810ce1f5>] ?
>> print_bad_pte+0x1a5/0x1bd
>> [1295549.784075] [<ffffffff810cde55>] ? pte_pfn+0x5/0xe
>> [1295549.784083] [<ffffffff810cfe5c>] ? unmap_vmas+0x4d5/0x6ca
>> [1295549.784095] [<ffffffff810d00e1>] ?
>> zap_page_range+0x90/0xb8
>> [1295549.784108] [<ffffffff810d5ce0>] ?
>> mmap_region+0x353/0x44a
>> [1295549.784122] [<ffffffff81036428>] ?
>> should_resched+0x5/0x23
>> [1295549.784133] [<ffffffff810cdba2>] ?
>> sys_madvise+0x3d2/0x5fc
>> [1295549.784147] [<ffffffff81053e6c>] ?
>> recalc_sigpending+0x23/0x3c
>> [1295549.784156] [<ffffffff81054518>] ?
>> __set_task_blocked+0x5e/0x65
>> [1295549.784168] [<ffffffff81052e40>] ?
>> spin_unlock_irq+0xa/0xb
>> [1295549.784178] [<ffffffff8105601c>] ? sigprocmask+0x5c/0x63
>> [1295549.784191] [<ffffffff813529d2>] ?
>> system_call_fastpath+0x16/0x1b
>> [1295549.784201] Disabling lock debugging due to kernel taint
>>
>> There's a bit more info and a full dmesg in
>> http://bugs.debian.org/711249
>
> Thank you.
> Boris,
> Did you fix a similar issue in v3.9? There was the cgroup one which I
> thought had a similar back-track?
The only thing I can think of is the issue related to lazy MMU flush
that involved zap_page_range(). The signature was slightly different
though. It's commit 1160c2779b826c6f5c08e5cc542de58fd1f667d5.
-boris
^ permalink raw reply [flat|nested] 3+ messages in thread
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