On Thu, Jul 14, 2011 at 08:03:09PM +0200, Peter Klotz wrote: > On 07/14/2011 01:23 PM, Guus Sliepen wrote: > > >I'm having a problem with a system having an XFS filesystem on RAID locking up > >fairly consistently when writing large amounts of data to it, with several > >kernels, including 2.6.38.2 and 2.6.39.3, on both AMD and Intel multi-core > >processors. The kernel always logs this several times: > > > >BUG: soft lockup - CPU#2 stuck for 67s! [kswapd0:33] [...] > This Bugzilla entry documents the XFS bug from 2009 in detail > including links: > > http://oss.sgi.com/bugzilla/show_bug.cgi?id=805 Aha, I did not look at that before. > The problem was finally solved by a patch proposed by Linus. This is > the reason the original patch developed by Nick never made it into > the kernel. > > My tests back then showed that both patches fixed the problem. > > It seems you have found a test case where just Nick's patch helps. Yes. I agree with Linus that the root cause should be fixed, not the symptoms. I don't have time to dive in the kernel code myself, but I do have several nearly identical machines where I can test things on. I will be happy to test out patches and/or different kernel versions or kernel configurations, and I can provide dmesg output and perhaps other information if necessary. -- Met vriendelijke groet / with kind regards, Guus Sliepen <Guus.Sliepen@xxxxxxxxxxx>
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