lkml.org 
[lkml]   [2016]   [Nov]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: [bug report v4.8] fs/locks.c: kernel oops during posix lock stress test
Hi Will,

On Mon, Nov 28, 2016 at 6:52 PM, Will Deacon <will.deacon@arm.com> wrote:
> Hi Ming,
>
> On Mon, Nov 28, 2016 at 11:10:14AM +0800, Ming Lei wrote:
>> When I run stress-ng via the following steps on one ARM64 dual
>> socket system(Cavium Thunder), the kernel oops[1] can often be
>> triggered after running the stress test for several hours(sometimes
>> it may take longer):
>>
>> - git clone git://kernel.ubuntu.com/cking/stress-ng.git
>> - apply the attachment patch which just makes the posix file
>> lock stress test more aggressive
>> - run the test via '~/git/stress-ng$./stress-ng --lockf 128 --aggressive'
>>
>>
>> From the oops log, looks one garbage file_lock node is got
>> from the linked list of 'ctx->flc_posix' when the issue happens.
>>
>> BTW, the issue isn't observed on single socket Cavium Thunder yet,
>> and the same issue can be seen on Ubuntu Xenial(v4.4 based kernel)
>> too.
>
> I've seen issues with the LSE atomics on the Thunder platform -- can you
> try disabling those (CONFIG_ARM64_LSE_ATOMICS) and see if the problem
> persists, please?
>

Ubuntu Xenial doesn't enable CONFIG_ARM64_LSE_ATOMICS, which
is disabled in my v4.8 kernel config too, please see that in the attachement.


Thanks,
Ming
[unhandled content-type:application/x-gzip]
\
 
 \ /
  Last update: 2016-11-28 13:39    [W:0.092 / U:0.088 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site