From: NeilBrown <neilb@suse.de>
Date: Fri, 6 Jan 2006 08:20:17 +0000 (-0800)
Subject: [PATCH] md: fix raid6 resync check/repair code
X-Git-Tag: v2.6.16-rc1~936^2~44
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ca65b73bd9c301d243df93780f7b26579e6c9204;p=pandora-kernel.git

[PATCH] md: fix raid6 resync check/repair code

raid6 currently does not check the P/Q syndromes when doing a resync, it just
calculates the correct value and writes it.  Doing the check can reduce writes
(often to 0) for a resync, and it is needed to properly implement the

  echo check > sync_action

operation.

This patch implements the appropriate checks and tidies up some related code.

It also allows raid6 user-requested resync to bypass the intent bitmap.

Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

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