linux-kernel - Re: [PATCH] Improve buffered streaming write ordering

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Message-ID: <20081007090554.GA23811@infradead.org>
Date:	Tue, 7 Oct 2008 05:05:54 -0400
From:	Christoph Hellwig <hch@...radead.org>
To:	"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>
Cc:	Chris Mason <chris.mason@...cle.com>,
	Dave Chinner <david@...morbit.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	linux-fsdevel <linux-fsdevel@...r.kernel.org>,
	ext4 <linux-ext4@...r.kernel.org>
Subject: Re: [PATCH] Improve buffered streaming write ordering

On Tue, Oct 07, 2008 at 02:15:31PM +0530, Aneesh Kumar K.V wrote:
> +static int ext4_write_cache_pages(struct address_space *mapping,
> +		      struct writeback_control *wbc, writepage_t writepage,
> +		      void *data)
> +{

Looking at this functions the only difference is killing the
writeback_index and range_start updates.  If they are bad why would we
only remove them from ext4?

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