Hi Will, On Mon, Nov 28, 2016 at 6:52 PM, Will Deacon <will.deacon@xxxxxxx> 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
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config-v4.8.tar.gz
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