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Date: Wed, 9 Sep 2009 20:32:23 +0800
From: Wu Fengguang <fengguang.wu@...el.com>
To: Christoph Hellwig <hch@...radead.org>
Cc: Chris Mason <chris.mason@...cle.com>,
Peter Zijlstra <peterz@...radead.org>,
Artem Bityutskiy <dedekind1@...il.com>,
Jens Axboe <jens.axboe@...cle.com>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>,
"david@...morbit.com" <david@...morbit.com>,
"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
"jack@...e.cz" <jack@...e.cz>, Theodore Ts'o <tytso@....edu>
Subject: Re: [PATCH 8/8] vm: Add an tuning knob for vm.max_writeback_mb
On Wed, Sep 09, 2009 at 08:28:06PM +0800, Christoph Hellwig wrote:
> On Wed, Sep 09, 2009 at 05:29:01PM +0800, Wu Fengguang wrote:
> > It seems that balance_dirty_pages() is not coupled with MAX_WRITEBACK_PAGES.
> > Instead it uses the much smaller (ratelimit_pages + ratelimit_pages / 2).
>
> With Jen's writeback patches applied balance_dirty_pages does not start
> writeback itself anymore but calls bdi_start_writeback to let the
> flusher thread do it.
>
> it would be good if we do any writeback tuning ontop of these patches..
Ah OK. I'm using latest linux-next and expected his patches to be there..
Thanks,
Fengguang
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