linux-kernel - Re: [PATCH 02/18] fs: Convert nr_inodes and nr

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Message-ID: <20101008070108.GA23595@lst.de>
Date:	Fri, 8 Oct 2010 03:01:08 -0400
From:	Christoph Hellwig <hch@....de>
To:	Dave Chinner <david@...morbit.com>
Cc:	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 02/18] fs: Convert nr_inodes and nr_unused to per-cpu
 counters

On Fri, Oct 08, 2010 at 04:21:16PM +1100, Dave Chinner wrote:
> From: Dave Chinner <dchinner@...hat.com>
> 
> The number of inodes allocated does not need to be tied to the
> addition or removal of an inode to/from a list. If we are not tied
> to a list lock, we could update the counters when inodes are
> initialised or destroyed, but to do that we need to convert the
> counters to be per-cpu (i.e. independent of a lock). This means that
> we have the freedom to change the list/locking implementation
> without needing to care about the counters.
> 
> Based on a patch originally from Eric Dumazet.
> 
> Signed-off-by: Dave Chinner <dchinner@...hat.com>

Looks good except for a spurious whitespace change in inode_init_early.


Reviewed-by: Christoph Hellwig <hch@....de>

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