On Wed, 7 Dec 2005 13:04:43 -0800 mike <[EMAIL PROTECTED]> wrote: > > I believe there is an issue with kernels < 2.6.14-2 with Opteron > > SMP. That is why I'm running 2.6.14-2 myself. > > > > The issue was an AMD errata rather than a bug with the kernel - > > 2.6.14-2 contained a workaround. > > I think that's all that NUMA stuff right? It wasnt optimized properly > or something...
It was the TLB flush filtering issue. Here's a link. It's long, so I've reproduced the clip below. http://www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.14-rc2 <quote> commit bc5e8fdfc622b03acf5ac974a1b8b26da6511c99 Author: Linus Torvalds <[EMAIL PROTECTED]> Date: Sat Sep 17 15:41:04 2005 -0700 x86-64/smp: fix random SIGSEGV issues They seem to have been due to AMD errata 63/122; the fix is to disable TLB flush filtering in SMP configurations. Confirmed to fix the problem by Andrew Walrond <[EMAIL PROTECTED]> [ Let's see if we'll have a better fix eventually, this is the Q&D "let's get this fixed and out there" version ] Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]> </quote> And here's another link: http://lkml.org/lkml/2005/9/20/207 <quote> Date Tue, 20 Sep 2005 10:30:48 -0700 (PDT) From Linus Torvalds <> Subject Re: x86-64 bad pmds in 2.6.11.6 On Tue, 20 Sep 2005, Charles McCreary wrote: > > Another datapoint for this thread. The box spewing the bad pmds > messages is a dual opteron 246 on a TYAN S2885 Thunder K8W > motherboard. Kernel is 2.6.11.4-20a-smp. This is quite possibly the result of an Opteron errata (tlb flush filtering is broken on SMP) that we worked around as of 2.6.14-rc4. So either just try 2.6.14-rc2, or try the appended patch (it has since been confirmed by many more people). Linus </quote> Regards, Ozz.
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