linux-kernel - Re: [patch 1/2]block: handle merged discard request

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Date:	Mon, 20 Aug 2012 10:15:13 -0400
From:	Christoph Hellwig <hch@...radead.org>
To:	Mike Snitzer <snitzer@...hat.com>
Cc:	Christoph Hellwig <hch@...radead.org>,
	"Martin K. Petersen" <martin.petersen@...cle.com>,
	Shaohua Li <shli@...nel.org>, Vivek Goyal <vgoyal@...hat.com>,
	axboe@...nel.dk, linux-kernel@...r.kernel.org, neilb@...e.de,
	linux-scsi@...r.kernel.org
Subject: Re: [patch 1/2]block: handle merged discard request

On Mon, Aug 20, 2012 at 10:12:29AM -0400, Mike Snitzer wrote:
> Thought we pushed that down?  Hence sd_setup_discard_cmnd's
> alloc_page + blk_add_request_payload hack.

Yeah, but we still need the bio_vec from early on, as it's allocated as
part of the bio.
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