linux-kernel - Re: rq_affinity doesn't seem to work?

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Message-ID: <20110716024015.GA32253@infradead.org>
Date:	Fri, 15 Jul 2011 22:40:15 -0400
From:	Christoph Hellwig <hch@...radead.org>
To:	ersatz splatt <ersatzsplatt@...il.com>
Cc:	Roland Dreier <roland@...estorage.com>,
	Matthew Wilcox <matthew@....cx>, Jens Axboe <axboe@...nel.dk>,
	"Jiang, Dave" <dave.jiang@...el.com>,
	"Williams, Dan J" <dan.j.williams@...el.com>,
	"Foong, Annie" <annie.foong@...el.com>,
	"linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Nadolski, Edmund" <edmund.nadolski@...el.com>,
	"Skirvin, Jeffrey D" <jeffrey.d.skirvin@...el.com>
Subject: Re: rq_affinity doesn't seem to work?

On Fri, Jul 15, 2011 at 04:43:44PM -0700, ersatz splatt wrote:
> I have a dual socket system with Tylersburg chipset (approximately
> Westmere I gather).
> With two Xeon X5660 packages I get this when running with more iops
> potential than the system can handle:

What HBA do you use? Does it already have a lockless ->queuecommand?

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