linux-kernel - Re: [PATCH v2 01/16] FS: Added demand paging markers to filesystem

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Message-ID: <20120509152758.GB16341@redhat.com>
Date:	Wed, 9 May 2012 11:27:58 -0400
From:	Vivek Goyal <vgoyal@...hat.com>
To:	"S, Venkatraman" <svenkatr@...com>
Cc:	Dave Chinner <david@...morbit.com>, linux-mmc@...r.kernel.org,
	cjb@...top.org, linux-mm@...ck.org, linux-fsdevel@...r.kernel.org,
	linux-omap@...r.kernel.org, linux-kernel@...r.kernel.org,
	arnd.bergmann@...aro.org, alex.lemberg@...disk.com,
	ilan.smith@...disk.com, lporzio@...ron.com,
	rmk+kernel@....linux.org.uk
Subject: Re: [PATCH v2 01/16] FS: Added demand paging markers to filesystem

On Mon, May 07, 2012 at 10:16:30PM +0530, S, Venkatraman wrote:

[..]
> This feature doesn't fiddle with the I/O scheduler's ability to balance
> read vs write requests or handling requests from various process queues (CFQ).
> 

Does this feature work with CFQ? As CFQ does not submit sync IO (for
idling queues) while async IO is pending and vice a versa (cfq_may_dispatch()).

Thanks
Vivek
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