From: Mikulas Patocka <mpatocka@redhat.com>
Date: Fri, 27 Jul 2012 14:08:03 +0000 (+0100)
Subject: dm: introduce split_discard_requests
X-Git-Tag: v3.6-rc1~56^2~46
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7acf0277cea0f2da89ffffcc9892bea23f618e63;p=pandora-kernel.git

dm: introduce split_discard_requests

This patch introduces a new variable split_discard_requests. It can be
set by targets so that discard requests are split on max_io_len
boundaries.

When split_discard_requests is not set, discard requests are only split on
boundaries between targets, as was the case before this patch.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
---

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