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Date:	Thu, 13 Sep 2012 02:12:55 +0200
From:	Andrea Arcangeli <>
To:	Michal Hocko <>
Cc:	Will Deacon <>,,,,
Subject: Re: [PATCH 0/3] Minor changes to common hugetlb code for ARM

Hi everyone,

On Wed, Sep 12, 2012 at 05:27:59PM +0200, Michal Hocko wrote:
> On Tue 11-09-12 17:47:13, Will Deacon wrote:
> > Hello,
> Hi,
> > A few changes are required to common hugetlb code before the ARM support
> > can be merged. I posted the main one previously, which has been picked up
> > by akpm:
> > 
> >
> > 
> > The remaining three patches (included here) are all fairly minor but do
> > affect other architectures.
> I am quite confused. Why THP changes are required for hugetlb code for
> ARM?

Some functions are just noops on x86 and with no arch other than x86
building the huge_memory.c file, those x86-noop parts that needed
minor interface adjustments couldn't be noticed until now.

Hopefully we got the brainer part right (i.e. the location of the x86
noop callouts), it's clearly untested.

> Besides that I would suggest adding Andrea to the CC (added now the
> whole series can be found here list
> for all THP changes.
> > 
> > All comments welcome,
> > 
> > Will
> > 
> > Catalin Marinas (2):
> >   mm: thp: Fix the pmd_clear() arguments in pmdp_get_and_clear()
> >   mm: thp: Fix the update_mmu_cache() last argument passing in
> >     mm/huge_memory.c


Reviewed-by: Andrea Arcangeli <>

> > 
> > Steve Capper (1):

This was already introduced by the s390 THP support which I reviewed a
few days ago, and it's already included in -mm, so it can be dropped.

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