linux-kernel - Re: [PATCH -V2 1/9] mm: move hugetlbfs region tracking function to common code

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Message-ID: <87linge07l.fsf@linux.vnet.ibm.com>
Date:	Sun, 04 Mar 2012 23:07:50 +0530
From:	"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-mm@...ck.org, mgorman@...e.de,
	kamezawa.hiroyu@...fujitsu.com, dhillf@...il.com,
	aarcange@...hat.com, mhocko@...e.cz, hannes@...xchg.org,
	linux-kernel@...r.kernel.org, cgroups@...r.kernel.org,
	Andrea Righi <andrea@...terlinux.com>,
	John Stultz <john.stultz@...aro.org>
Subject: Re: [PATCH -V2 1/9] mm:  move hugetlbfs region tracking function to common code

On Thu, 1 Mar 2012 14:33:45 -0800, Andrew Morton <akpm@...ux-foundation.org> wrote:
> On Thu,  1 Mar 2012 14:46:12 +0530
> "Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com> wrote:
> 
> > This patch moves the hugetlbfs region tracking function to
> > common code. We will be using this in later patches in the
> > series.
> > 
> > ...
> >
> > +struct file_region {
> > +	struct list_head link;
> > +	long from;
> > +	long to;
> > +};
> 
> Both Andrea Righi and John Stultz are working on (more sophisticated)
> versions of file region tracking code.  And we already have a (poor)
> implementation in fs/locks.c.
> 
> That's four versions of the same thing floating around the place.  This
> is nutty.


We should be able to remove region.c once other alternatives are in
upstream. I will also look at the alternatives and see if it would need
any change to make it usable for this work.

Thanks,
-aneesh

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