From: NeilBrown <neilb@suse.de>
Date: Mon, 14 Dec 2009 01:49:56 +0000 (+1100)
Subject: md: Support write-intent bitmaps with externally managed metadata.
X-Git-Tag: v2.6.33-rc1~284^2~9
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ece5cff0da9e696c360fff592cb5f51b6419e4d6;p=pandora-kernel.git

md: Support write-intent bitmaps with externally managed metadata.

In this case, the metadata needs to not be in the same
sector as the bitmap.
md will not read/write any bitmap metadata.  Config must be
done via sysfs and when a recovery makes the array non-degraded
again, writing 'true' to 'bitmap/can_clear' will allow bits in
the bitmap to be cleared again.

Signed-off-by: NeilBrown <neilb@suse.de>
---

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