linux-kernel - Re: kernel panic - not syncing: out of memory and no killable processes

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Date:	Thu, 17 Sep 2009 17:27:19 -0400
From:	Eric Paris <eparis@...hat.com>
To:	David Rientjes <rientjes@...gle.com>
Cc:	Ingo Molnar <mingo@...e.hu>, linux-kernel@...r.kernel.org,
	torvalds@...ux-foundation.org, a.p.zijlstra@...llo.nl
Subject: Re: kernel panic - not syncing: out of memory and no killable
 processes

On Thu, 2009-09-17 at 17:01 -0400, Eric Paris wrote:
> On Thu, 2009-09-17 at 16:35 -0400, Eric Paris wrote:
> > On Thu, 2009-09-17 at 13:29 -0700, David Rientjes wrote:
> > > On Thu, 17 Sep 2009, Eric Paris wrote:
> > > 
> > > > the next-20090916 tree still panic's the same way.  As does Linus'
> > > > latest git tree ab86e5765
> > > > 
> > > > I'll try bisecting between v2.6.31 and master if it would give better
> > > > data than trying to bisect between two -next trees, but I'm sorta stuck
> > > > with a machine that won't boot and doesn't tell me much about why.
> > > > 
> > > 
> > 
> > > Try merging the following patch to get more information such as the 
> > > allocation order and gfp_mask.  It will also show the VM size of all 
> > > kthreads and the state of your system memory to deterine whether there's a 
> > > page allocator issue, lowmem_reserve_ratio is too high, etc.
> > 
> > I'll throw it in.
> > 
> > I did another bisect (mainly because the last one gave a commit that
> > obviously seemed bogus and Ingo ask me to)
> > 
> > 3f2aa307c4d26b4ed6509d0a79e8254c9e07e921 is first bad commit
> > commit 3f2aa307c4d26b4ed6509d0a79e8254c9e07e921
> > Author: Ingo Molnar <mingo@...e.hu>
> > Date:   Thu Sep 10 20:34:48 2009 +0200
> > 
> >     sched: Disable NEW_FAIR_SLEEPERS for now
> > 
> > I'm about to try a linus latest kernel with just this one patch
> > reverted.
> 
> Odd, I tried to revert this patch but it still went boom....

Guess I did something wrong lsat time I tried to revert.  I'm now at 5
successful boots with the patch reverted.  Don't ask me how changing
NEW_FAIR_SLEEPERS causes me to run out of Node 0 DMA32 memory.  But it
does....

-Eric

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