Messages in this thread | | | Date | Mon, 28 Nov 2016 10:52:54 +0000 | From | Will Deacon <> | Subject | Re: [bug report v4.8] fs/locks.c: kernel oops during posix lock stress test |
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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?
Will
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