From: NeilBrown Date: Tue, 9 Sep 2014 03:49:46 +0000 (+1000) Subject: md/raid1: be more cautious where we read-balance during resync. X-Git-Tag: fixes-for-v3.18-merge-window~77^2~6 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c6d119cf1b5a778e9ed60a006e2a434fcc4471a2;p=pandora-kernel.git md/raid1: be more cautious where we read-balance during resync. commit 79ef3a8aa1cb1523cc231c9a90a278333c21f761 made it possible for reads to happen concurrently with resync. This means that we need to be more careful where read_balancing is allowed during resync - we can no longer be sure that any resync that has already started will definitely finish. So keep read_balancing to before recovery_cp, which is conservative but safe. This bug makes it possible to read from a device that doesn't have up-to-date data, so it can cause data corruption. So it is suitable for any kernel since 3.11. Fixes: 79ef3a8aa1cb1523cc231c9a90a278333c21f761 cc: stable@vger.kernel.org (v3.13+) Signed-off-by: NeilBrown --- Reading git-diff-tree failed