linux-kernel - Re: [PATCH 2/5] mtip32xx: handle arbitrary size bios

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Message-ID: <20131126073240.GG9244@kmo-pixel>
Date:	Mon, 25 Nov 2013 23:32:41 -0800
From:	Kent Overstreet <kmo@...erainc.com>
To:	Christoph Hellwig <hch@...radead.org>
Cc:	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	axboe@...nel.dk, Asai Thambi S P <asamymuthupa@...ron.com>,
	Sam Bradshaw <sbradshaw@...ron.com>
Subject: Re: [PATCH 2/5] mtip32xx: handle arbitrary size bios

On Mon, Nov 25, 2013 at 10:10:18PM -0800, Christoph Hellwig wrote:
> On Mon, Nov 25, 2013 at 02:30:30PM -0800, Kent Overstreet wrote:
> > We get a measurable performance increase by handling this in the driver when
> > we're already looping over the biovec, instead of handling it separately in
> > generic_make_request() (or bio_add_page() originally)
> 
> Given that Jens has a patch queue up to convert the driver to blk-mq
> adjusting the blk-mq infrastructure to handle this might be a better
> plan forward..

I mostly wanted the patch in the series as an example conversion -
converting blk-mq is going to take some thought and time to familiarize
myself with the code.
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