From: Jens Axboe <jens.axboe@oracle.com>
To: Theodore Tso <tytso@mit.edu>
Cc: Christoph Hellwig <hch@infradead.org>,
linux-mm@kvack.org,
Ext4 Developers List <linux-ext4@vger.kernel.org>,
linux-fsdevel@vger.kernel.org, chris.mason@oracle.com
Subject: Re: [PATCH, RFC] vm: Add an tuning knob for vm.max_writeback_pages
Date: Mon, 31 Aug 2009 22:36:36 +0200 [thread overview]
Message-ID: <20090831203636.GD12579@kernel.dk> (raw)
In-Reply-To: <20090831155441.GB23535@mit.edu>
On Mon, Aug 31 2009, Theodore Tso wrote:
> At the risk of asking a stupid question, what *is* range_cyclic and
> what is it trying to do? I've been looking at the code and am I'm
> getting myself very confused about what the code is trying to do and
> what was its original intent.
Range cyclic means that the current writeback in ->writepages() should
start where it left off the last time, non-range cyclic starts off at
->range_start. ->writepages() can use mapping->writeback_index to store
such information.
--
Jens Axboe
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next prev parent reply other threads:[~2009-08-31 20:36 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-08-30 2:54 [PATCH, RFC] vm: Add an tuning knob for vm.max_writeback_pages Theodore Ts'o
2009-08-30 2:54 ` Theodore Ts'o
2009-08-30 16:52 ` Christoph Hellwig
2009-08-30 16:52 ` Christoph Hellwig
2009-08-30 18:17 ` Theodore Tso
2009-08-30 18:17 ` Theodore Tso
2009-08-30 22:27 ` Christoph Hellwig
2009-08-30 22:27 ` Christoph Hellwig
2009-08-31 3:08 ` Theodore Tso
2009-08-31 3:08 ` Theodore Tso
2009-08-31 10:29 ` Jens Axboe
2009-08-31 10:29 ` Jens Axboe
2009-08-31 10:47 ` Jens Axboe
2009-08-31 10:47 ` Jens Axboe
2009-08-31 12:37 ` Theodore Tso
2009-08-31 12:37 ` Theodore Tso
2009-08-31 15:54 ` Theodore Tso
2009-08-31 20:36 ` Jens Axboe [this message]
2009-08-31 21:03 ` Theodore Tso
2009-09-01 7:57 ` Aneesh Kumar K.V
2009-09-01 9:17 ` Jens Axboe
2009-09-01 18:00 ` Chris Mason
2009-09-01 20:30 ` Theodore Tso
2009-09-01 20:30 ` Theodore Tso
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