From: Bernd Schubert <bs@q-leap.de>
Date: Fri, 23 May 2008 20:04:38 +0000 (-0700)
Subject: md: allow parallel resync of md-devices.
X-Git-Tag: v2.6.26-rc4~36
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=90b08710e41a07d4ff0fb8940dcce3a552991a56;p=pandora-kernel.git

md: allow parallel resync of md-devices.

In some configurations, a raid6 resync can be limited by CPU speed
(Calculating P and Q and moving data) rather than by device speed.  In
these cases there is nothing to be gained byt serialising resync of arrays
that share a device, and doing the resync in parallel can provide benefit.
 So add a sysfs tunable to flag an array as being allowed to resync in
parallel with other arrays that use (a different part of) the same device.

Signed-off-by: Bernd Schubert <bs@q-leap.de>
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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