From: Jens Axboe <axboe@suse.de>
Date: Sun, 5 Feb 2006 07:27:38 +0000 (-0800)
Subject: [PATCH] fix ordering on requeued request drainage
X-Git-Tag: v2.6.16-rc3~173
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9a7a67af8bb02106f0fb01dd9d237332f874be9a;p=pandora-kernel.git

[PATCH] fix ordering on requeued request drainage

Previously, if a fs request which was being drained failed and got
requeued, blk_do_ordered() didn't allow it to be reissued, which causes
queue stall.  This patch makes blk_do_ordered() use the sequence of each
request to determine whether a request can be issued or not.  This fixes
the bug and simplifies code.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Acked-by: Jens Axboe <axboe@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

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