linux-kernel - Re: [patch,v3,repost 00/10] make I/O path allocations more numa-friendly

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Message-ID: <x49zk1l6b5p.fsf@segfault.boston.devel.redhat.com>
Date:	Mon, 10 Dec 2012 12:59:30 -0500
From:	Jeff Moyer <jmoyer@...hat.com>
To:	JBottomley@...allels.com, linux-kernel@...r.kernel.org
Cc:	linux-scsi@...r.kernel.org, JBottomley@...allels.com,
	Bart Van Assche <bvanassche@....org>
Subject: Re: [patch,v3,repost 00/10] make I/O path allocations more numa-friendly

Jeff Moyer <jmoyer@...hat.com> writes:

> Hi,
>
> This patch set makes memory allocations for data structures used in
> the I/O path more numa friendly by allocating them from the same numa
> node as the storage device.  I've only converted a handful of drivers
> at this point.  My testing is limited by the hardware I have on hand.
> Using these patches, I was able to max out the bandwidth of the storage
> controller when issuing I/O from any node on my 4 node system.  Without
> the patch, I/O from nodes remote to the storage device would suffer a
> penalty ranging from 6-12%.  Given my relatively low-end setup[1], I
> wouldn't be surprised if others could show a more significant performance
> advantage.
>
> This is a repost of the last posting.  The only changes are additional
> reviewed-by/acked-by tags.  I think this version is ready for inclusion.
> James, would you mind taking a look?

James?  Do you have any objections to including this for 3.8?

-Jeff
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