linux-kernel - Re: 3.5-rc6 printk formatting problem during oom-kill.

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Date:	Mon, 09 Jul 2012 20:48:51 +0200
From:	Kay Sievers <kay@...y.org>
To:	Dave Jones <davej@...hat.com>
Cc:	Linux Kernel <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Greg Kroah-Hartmann <greg@...ah.com>
Subject: Re: 3.5-rc6 printk formatting problem during oom-kill.

On Mon, 2012-07-09 at 20:27 +0200, Kay Sievers wrote:
> On Mon, Jul 9, 2012 at 8:03 PM, Dave Jones <davej@...hat.com> wrote:
> > I noticed that the format of the oom-killer output seems to have changed, and
> > now it spews stuff like..
> >
> > [49461.758070] lowmem_reserve[]:
> > [49461.758071]  0
> > [49461.758071]  2643
> > [49461.758071]  3878
> > [49461.758072]  3878
> > [49461.758072]
> > [49461.758072] Node 0
> 
> > Does the oom-killer code need modifying, or the printk code ?
> > I know there's been some regressions in this area recently, but this is still
> > happening on the current tree (8c84bf4166a4698296342841a549bbee03860ac0)
> 
> This likely fixes it:
>   http://git.kernel.org/?p=linux/kernel/git/kay/patches.git;a=blob;f=kmsg-merge-cont.patch;hb=HEAD
> 
> Let me check if it does, and if I can reproduce it.

It looks fine here with the above mentioned patch:
[    0.000000] lowmem_reserve[]:
[    0.000000]  0
[    0.000000]  0
[    0.000000]  0
[    0.000000]  0
[    0.000000] 
[    0.000000] DMA: 
[    0.000000] 1*4kB 
[    0.000000] 0*8kB 
[    0.000000] 0*16kB 
[    0.000000] 1*32kB 
[    0.000000] 2*64kB 
[    0.000000] 1*128kB 
[    0.000000] 1*256kB 
[    0.000000] 0*512kB 
[    0.000000] 1*1024kB 
[    0.000000] 1*2048kB 
[    0.000000] 3*4096kB 
[    0.000000] = 15908kB

becomes:
[    0.000000] lowmem_reserve[]: 0 0 0 0
[    0.000000] DMA: 1*4kB 0*8kB 0*16kB 1*32kB 2*64kB 1*128kB 1*256kB 0*512kB 1*1024kB 1*2048kB 3*4096kB = 15908kB

Thanks,
Kay


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