From: Milan Broz <mbroz@redhat.com>
Date: Tue, 3 Oct 2006 08:15:39 +0000 (-0700)
Subject: [PATCH] dm crypt: move io to workqueue
X-Git-Tag: v2.6.19-rc1~258
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=23541d2d288cdb54f417ba1001dacc7f3ea10a97;p=pandora-kernel.git

[PATCH] dm crypt: move io to workqueue

This patch is designed to help dm-crypt comply with the
new constraints imposed by the following patch in -mm:
  md-dm-reduce-stack-usage-with-stacked-block-devices.patch

Under low memory the existing implementation relies upon waiting for I/O
submitted recursively to generic_make_request() completing before the original
generic_make_request() call can return.

This patch moves the I/O submission to a workqueue so the original
generic_make_request() can return immediately.

Signed-off-by: Milan Broz <mbroz@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

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