linux-kernel - Re: [PATCH 00/19] periodic write-back timer optimization

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Message-ID: <4A1D3418.8060909@nokia.com>
Date:	Wed, 27 May 2009 15:37:44 +0300
From:	Artem Bityutskiy <Artem.Bityutskiy@...ia.com>
To:	Jens Axboe <jens.axboe@...cle.com>
CC:	Arnd Bergmann <arnd@...db.de>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>,
	Christoph Hellwig <hch@...radead.org>
Subject: Re: [PATCH 00/19] periodic write-back timer optimization

Jens Axboe wrote:
> On Wed, May 27 2009, Artem Bityutskiy wrote:
>> ext Arnd Bergmann wrote:
>>> On Wednesday 27 May 2009, Artem Bityutskiy wrote:
>>>> Hi,
>>>>
>>>> This is the second attempt. The first one was here:
>>>> http://marc.info/?l=linux-fsdevel&m=124301072305588&w=2
>>>> It was very hacky and got no comments.
>>> How does this relate to the per-BDI writeback patches that
>>> Jens is working on? Doesn't that require a completely different
>>> (probably simpler) implementation of your patch?
>> At a quick glance, our works do not intersect. He seems
>> to be changing the guts of write-back, while I only touch
>> the timer which wakes up the periodic write-back thread,
>> nothing else. I'll try to take Jens' patches and see.
> 
> There's definitely overlap! The timer is gone with my patches and so is
> pdflush. For an idle (idle here meaning no background writeback
> activity) system, there should just be bdi-default running. And that
> will wake up every dirty_writeback_interval by default.

Hmm, right. Will be working on top of your patches then.

-- 
Best Regards,
Artem Bityutskiy (Артём Битюцкий)
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