linux-ext4 - Re: [PATCH 2/3] vfs: Implement generic per-cpu counters for delayed allocation

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Message-ID: <20101009074446.GA15551@infradead.org>
Date:	Sat, 9 Oct 2010 03:44:46 -0400
From:	Christoph Hellwig <hch@...radead.org>
To:	Jan Kara <jack@...e.cz>
Cc:	linux-ext4@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH 2/3] vfs: Implement generic per-cpu counters for delayed
 allocation

On Sat, Oct 09, 2010 at 02:12:26AM +0200, Jan Kara wrote:
> Implement free blocks and reserved blocks counters for delayed allocation.
> These counters are reliable in the sence that when they return success, the
> subsequent conversion from reserved to allocated blocks always succeeds (see
> comments in the code for details). This is useful for ext3 filesystem to
> implement delayed allocation in particular for allocation in page_mkwrite.

This doesn't really look like generic code that should go into the core
kernel.  I'd just add it to ext3 directly.

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