Messages in this thread | | | Date | Mon, 08 Aug 2005 17:55:44 +0100 | From | Andy Davidson <> | Subject | Re: x86-64 bad pmds in 2.6.11.6 |
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On Wed, 6 Apr, 2005 22:49:03 -0400, Dave Jones wrote: > On Thu, Mar 31, 2005 at 12:41:17PM +0200, Andi Kleen wrote: > > On Wed, Mar 30, 2005 at 04:44:55PM -0500, Dave Jones wrote: > > > I arrived at the office today to find my workstation had this spew > > > in its dmesg buffer.. > > Looks like random memory corruption to me. > > Can you enable slab debugging etc.? > > > mm/memory.c:97: bad pmd ffff81004b017438(00000038a5500a88). > > > mm/memory.c:97: bad pmd ffff81004b017440(0000000000000003). > > > mm/memory.c:97: bad pmd ffff81004b017448(00007ffffffff73b). > > > mm/memory.c:97: bad pmd ffff81004b017450(00007ffffffff73c). > I realised today that this happens every time X starts up for > the first time. I did some experiments, and found that with 2.6.12rc1 > it's gone. Either it got fixed accidentally, or its hidden now > by one of the many changes in 4-level patches. > I'll try and narrow this down a little more tomorrow, to see if I > can pinpoint the exact -bk snapshot (may be tricky given they were > broken for a while), as it'd be good to get this fixed in 2.6.11.x > if .12 isn't going to show up any time soon.
Hi, Dave, all --
Does anyone remember if they saw any system instability at the time of these messages ?
I'm running 2.6.11 on an SMP Opteron box, which is exhibiting these notices. The box occasionally then behaves like it would during a serious memory leak - the load average shoots up, the box becomes unresponsive, stops accepting network connections, (but memory resources are not entirely starved, and nor does the kernel kill any processes off.)
Then - a few minutes later, the computer returns to normal. This seems to happen maybe twice a week. Thankfully, it's not ruined my weekend with a phone call from support yet, but it might. ;-)
If you do remember instability at this time, which was cured with an upgrade, then I will schedule some down time to try this out.
--
Regards, Andy Davidson andy@ebuyer.com Systems Administrator, Ebuyer (UK) Ltd - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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