linux-kernel - Re: [REVIEW] NVM Express driver

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Message-ID: <20110304130645.GA21454@infradead.org>
Date:	Fri, 4 Mar 2011 08:06:45 -0500
From:	Christoph Hellwig <hch@...radead.org>
To:	Matthew Wilcox <willy@...ux.intel.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [REVIEW] NVM Express driver

What's the reason to make this a make_request based driver?  That loses
all the intelligence that has been put into the queueing layer, like I/O
bandwith controlling and fair scheduling.  Is it just queue_lock
contention?  If so it would be great if you could help with testing
Jens' stack-plug and request allocation scalability patches.

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