linux-kernel - Re: [PATCH 02/12] mm: scalable bdi statistics counters.

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Message-Id: <1175844139.6483.133.camel@twins>
Date:	Fri, 06 Apr 2007 09:22:19 +0200
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	miklos@...redi.hu, neilb@...e.de, dgc@....com,
	tomoki.sekiyama.qu@...achi.com, nikita@...sterfs.com
Subject: Re: [PATCH 02/12] mm: scalable bdi statistics counters.

On Thu, 2007-04-05 at 15:37 -0700, Andrew Morton wrote:
> On Thu, 05 Apr 2007 19:42:11 +0200
> root@...gramming.kicks-ass.net wrote:
> 
> > Provide scalable per backing_dev_info statistics counters modeled on the ZVC
> > code.
> > 
> > Signed-off-by: Peter Zijlstra <a.p.zijlstra@...llo.nl>
> > ---
> >  block/ll_rw_blk.c           |    1 
> >  drivers/block/rd.c          |    2 
> >  drivers/char/mem.c          |    2 
> >  fs/char_dev.c               |    1 
> >  fs/fuse/inode.c             |    1 
> >  fs/nfs/client.c             |    1 
> >  include/linux/backing-dev.h |   98 +++++++++++++++++++++++++++++++++++++++++
> >  mm/backing-dev.c            |  103 ++++++++++++++++++++++++++++++++++++++++++++
> 
> madness!  Quite duplicative of vmstat.h, yet all this infrastructure
> is still only usable in one specific application.
> 
> Can we please look at generalising the vmstat.h stuff?
> 
> Or, the API in percpu_counter.h appears suitable to this application.
> (The comment at line 6 is a total lie).

Ok, I'll see what I can come up with.

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