linux-kernel - Re: [PATCH 6/9] writeback: allow sleepy exit of default writeback task

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Message-ID: <20090806070326.GG12579@kernel.dk>
Date:	Thu, 6 Aug 2009 09:03:26 +0200
From:	Jens Axboe <jens.axboe@...cle.com>
To:	Jan Kara <jack@...e.cz>
Cc:	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	chris.mason@...cle.com, david@...morbit.com, hch@...radead.org,
	akpm@...ux-foundation.org, yanmin_zhang@...ux.intel.com,
	richard@....demon.co.uk, damien.wyart@...e.fr, fweisbec@...il.com,
	Alan.Brunelle@...com
Subject: Re: [PATCH 6/9] writeback: allow sleepy exit of default writeback
	task

On Wed, Aug 05 2009, Jan Kara wrote:
> On Thu 30-07-09 23:24:01, Jens Axboe wrote:
> > Since we do lazy create of default writeback tasks for a bdi, we can
> > allow sleepy exit if it has been completely idle for 5 minutes.
>   Maybe there should be a sysfs tunable to this?

Not sure, and when in doubt I prefer not to do that. But we could easily
add one, if people think it will be useful. What would the reason for
turning it off be?

-- 
Jens Axboe

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