Re: possible regression on 3.13 when calling flush_dcache_page
From: Ludovic Desroches
Date: Mon Jan 06 2014 - 04:34:07 EST
On Mon, Jan 06, 2014 at 09:26:48AM +0900, Joonsoo Kim wrote:
> On Fri, Jan 03, 2014 at 03:54:04PM +0100, Ludovic Desroches wrote:
> > Hi,
> > On Tue, Dec 24, 2013 at 03:38:37PM +0900, Joonsoo Kim wrote:
> > [...]
> > > > > > > > I think that this commit may not introduce a bug. This patch remove one
> > > > > > > > variable on slab management structure and replace variable name. So there
> > > > > > > > is no functional change.
> > You are right, the commit given by git bisect was not the good one...
> > Since I removed other patches done on top of it, I thought it really was
> > this one but in fact it is 8456a64.
> Okay. It seems more reasonable to me.
> I guess that this is the same issue with following link.
> And, perhaps, that patch solves your problem. But I'm not sure that it is the
> best solution for this problem. I should discuss with slab maintainers.
Yes this patch solves my problem.
> I will think about this problem more deeply and report the solution to you
> as soon as possible.
> > dd0f774 Fri Jan 3 12:33:55 2014 +0100 Revert "slab: remove useless
> > statement for checking pfmemalloc" Ludovic Desroches
> > ff7487d Fri Jan 3 12:32:33 2014 +0100 Revert "slab: rename
> > slab_bufctl to slab_freelist" Ludovic Desroches
> > b963564 Fri Jan 3 12:32:13 2014 +0100 Revert "slab: fix to calm down
> > kmemleak warning" Ludovic Desroches
> > 3fcfe50 Fri Jan 3 12:30:32 2014 +0100 Revert "slab: replace
> > non-existing 'struct freelist *' with 'void *'" Ludovic Desroches
> > 750a795 Fri Jan 3 12:30:16 2014 +0100 Revert "memcg, kmem: rename
> > cache_from_memcg to cache_from_memcg_idx" Ludovic Desroches
> > 7e2de8a Fri Jan 3 12:30:10 2014 +0100 mmc: atmel-mci: disable pdc
> > Ludovic Desroches
> > In this case I have the kernel oops. If I revert 8456a64 too, it
> > disappears.
> > I will try to test it on other devices because I couldn't reproduce it
> > with newer ones (but it's not the same ARM architecture so I would like
> > to see if it's also related to the device itself).
> > In attachment, there are the results of /proc/slabinfo before inserted the
> > sdio wifi module causing the oops.
> > Regards
> > Ludovic
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