Messages in this thread | | | Date | Wed, 17 Oct 2007 10:07:53 +0100 | From | Andy Whitcroft <> | Subject | Re: [BUG] 2.6.23-git8 kernel oops at __rb_rotate_left+0x7/0x70 |
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On Tue, Oct 16, 2007 at 07:00:37PM +0100, Andy Whitcroft wrote: > On Tue, Oct 16, 2007 at 11:46:31AM +0200, Ingo Molnar wrote: > > > > * Ingo Molnar <mingo@elte.hu> wrote: > > > > > > > > * Kamalesh Babulal <kamalesh@linux.vnet.ibm.com> wrote: > > > > > > > While running kernbench with the 2.6.23-git8 following oops is > > > > produced > > > > > > > > Unable to handle kernel NULL pointer dereference at 0000000000000010 RIP: > > > > [<ffffffff8033f347>] __rb_rotate_left+0x7/0x70 > > > > > > that looks nasty ... > > > > > > and -git8 should have the v2.6.23 scheduler code in essence. > > > > ah, this is likely with the recent scheduler commits included as well, > > right? > > > > if it's reproducable, could you try with group scheduling disabled, i.e. > > with: > > > > # CONFIG_FAIR_GROUP_SCHED is not set > > > > as that would be the main suspect for such type of a crash. > > Ok, preliminary results with this disabled seem to get us past > kernbench. I am rerunning with it enabled to confirm it blammo's.
A rerun with it enabled however ran to completion. So I think we have to assume this is at best not 100% reproducible. Seems that more directed testing is going on now.
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