linux-kernel - Re: Nigel's current for-rafael queue

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Date:	Tue, 03 Aug 2010 17:00:57 +1000
From:	Nigel Cunningham <nigel@...onice.net>
To:	Pavel Machek <pavel@....cz>
CC:	"Rafael J. Wysocki" <rjw@...k.pl>,
	Linux PM <linux-pm@...ts.linux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	TuxOnIce-devel <tuxonice-devel@...onice.net>
Subject: Re: Nigel's current for-rafael queue

Hi.

On 03/08/10 16:55, Pavel Machek wrote:
> On Wed 2010-06-02 22:18:59, Nigel Cunningham wrote:
>> Hi all.
>>
>> Here is my current patch queue.
>>
>> Taken together, the patches implement the separation of low level
>> block i/o into a separate file, switch from using swap_map_pages
>> to extents stores prior to the 'header' page and implement fully
>> asynchronous (rather than batched I/O). I have only run it under
>> VMware so far, but would estimate a doubling in speed due to the
>> async i/o.
>
> Do you have any numbers from real hw? Could similar speedup be
> accomplished by just increasing the batch size?

Yeah. I've been thinking I should really prepend a patch that lets you 
get the stats post-resume - unless you guys have some trick to enable 
you to read them that I haven't noticed yet :)

Nigel
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