linux-kernel - Re: mmotm: mm-slub-optimize-alloc-free-fastpath-by-removing-preemption-on-off.patch is causing preemptible splats

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Message-Id: <20150121214807.dcaa205b.akpm@linux-foundation.org>
Date:	Wed, 21 Jan 2015 21:48:07 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Stephen Rothwell <sfr@...b.auug.org.au>
Cc:	Joonsoo Kim <iamjoonsoo.kim@....com>,
	Michal Hocko <mhocko@...e.cz>,
	Krzysztof Kozłowski <k.kozlowski.k@...il.com>,
	Christoph Lameter <cl@...ux.com>,
	Jesper Dangaard Brouer <brouer@...hat.com>,
	linux-mm@...ck.org, LKML <linux-kernel@...r.kernel.org>
Subject: Re: mmotm:
 mm-slub-optimize-alloc-free-fastpath-by-removing-preemption-on-off.patch is
 causing preemptible splats

On Thu, 22 Jan 2015 16:14:02 +1100 Stephen Rothwell <sfr@...b.auug.org.au> wrote:

> Hi Andrew,
> 
> On Wed, 21 Jan 2015 19:34:11 -0800 Andrew Morton <akpm@...ux-foundation.org> wrote:
> >
> > On Thu, 22 Jan 2015 10:51:23 +0900 Joonsoo Kim <iamjoonsoo.kim@....com> wrote:
> > 
> > > > The most recent -mmotm was a bit of a trainwreck.  I'm scrambling to
> > > > get the holes plugged so I can get another mmotm out today.
> > > 
> > > Another mmotm will fix many issues from me. :/
> > 
> > I hit a wont-boot-cant-find-init in linux-next so I get to spend
> > tomorrow bisecting that :(
> 
> There has been a long discussion about something like that already.
> Subject "Re: linux-next: Tree for Jan 20 -- Kernel panic - Unable to
> mount root fs"

ah, thanks.  You might have saved me a ton of effort there.

And oolookitat, a fix.  I love it when viro says "Oh, fuck".

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