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Groups > linux.kernel > #1367220
| From | Boris Ostrovsky <boris.ostrovsky@oracle.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: 4.4: INFO: rcu_sched self-detected stall on CPU |
| Date | 2016-03-30 15:50 +0200 |
| Message-ID | <rioFs-68e-15@gated-at.bofh.it> (permalink) |
| References | (6 earlier) <rgH9v-7F2-3@gated-at.bofh.it> <rhXFg-3uj-7@gated-at.bofh.it> <ri2EW-7se-17@gated-at.bofh.it> <ri5Wa-18l-5@gated-at.bofh.it> <ri6fx-1xx-33@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On 03/29/2016 02:04 PM, Steven Haigh wrote:
> Greg, please see below - this is probably more for you...
>
> On 03/29/2016 04:56 AM, Steven Haigh wrote:
>> Interestingly enough, this just happened again - but on a different
>> virtual machine. I'm starting to wonder if this may have something to do
>> with the uptime of the machine - as the system that this seems to happen
>> to is always different.
>>
>> Destroying it and monitoring it again has so far come up blank.
>>
>> I've thrown the latest lot of kernel messages here:
>> http://paste.fedoraproject.org/346802/59241532
> So I just did a bit of digging via the almighty Google.
>
> I started hunting for these lines, as they happen just before the stall:
> BUG: Bad rss-counter state mm:ffff88007b7db480 idx:2 val:-1
> BUG: Bad rss-counter state mm:ffff880079c638c0 idx:0 val:-1
> BUG: Bad rss-counter state mm:ffff880079c638c0 idx:2 val:-1
>
> I stumbled across this post on the lkml:
> http://marc.info/?l=linux-kernel&m=145141546409607
>
> The patch attached seems to reference the following change in
> unmap_mapping_range in mm/memory.c:
>> - struct zap_details details;
>> + struct zap_details details = { };
> When I browse the GIT tree for 4.4.6:
> https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/tree/mm/memory.c?id=refs/tags/v4.4.6
>
> I see at line 2411:
> struct zap_details details;
>
> Is this something that has been missed being merged into the 4.4 tree?
> I'll admit my kernel knowledge is not enough to understand what the code
> actually does - but the similarities here seem uncanny.
The patch that you are referring to is trying to fix a bug in a feature
that's not in the mainline yet ("mm, oom: introduce oom reaper").
-boris
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4.4: INFO: rcu_sched self-detected stall on CPU Steven Haigh <netwiz@crc.id.au> - 2016-03-25 04:10 +0100
Re: [Xen-devel] 4.4: INFO: rcu_sched self-detected stall on CPU Boris Ostrovsky <boris.ostrovsky@oracle.com> - 2016-03-25 13:30 +0100
Re: [Xen-devel] 4.4: INFO: rcu_sched self-detected stall on CPU Steven Haigh <netwiz@crc.id.au> - 2016-03-25 15:10 +0100
Re: [Xen-devel] 4.4: INFO: rcu_sched self-detected stall on CPU Boris Ostrovsky <boris.ostrovsky@oracle.com> - 2016-03-25 15:50 +0100
Re: [Xen-devel] 4.4: INFO: rcu_sched self-detected stall on CPU Steven Haigh <netwiz@crc.id.au> - 2016-03-25 17:10 +0100
Re: [Xen-devel] 4.4: INFO: rcu_sched self-detected stall on CPU Boris Ostrovsky <boris.ostrovsky@oracle.com> - 2016-03-25 17:30 +0100
Re: 4.4: INFO: rcu_sched self-detected stall on CPU Steven Haigh <netwiz@crc.id.au> - 2016-03-25 22:10 +0100
Re: 4.4: INFO: rcu_sched self-detected stall on CPU Steven Haigh <netwiz@crc.id.au> - 2016-03-29 11:00 +0200
Re: 4.4: INFO: rcu_sched self-detected stall on CPU Boris Ostrovsky <boris.ostrovsky@oracle.com> - 2016-03-29 16:20 +0200
Re: 4.4: INFO: rcu_sched self-detected stall on CPU Steven Haigh <netwiz@crc.id.au> - 2016-03-29 19:50 +0200
Re: 4.4: INFO: rcu_sched self-detected stall on CPU Steven Haigh <netwiz@crc.id.au> - 2016-03-29 20:10 +0200
Re: 4.4: INFO: rcu_sched self-detected stall on CPU Boris Ostrovsky <boris.ostrovsky@oracle.com> - 2016-03-30 15:50 +0200
Re: 4.4: INFO: rcu_sched self-detected stall on CPU Steven Haigh <netwiz@crc.id.au> - 2016-04-02 04:00 +0200
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