tree 3a3135209c0dcb5dd2899b8afcc1701e2fdcf732
parent 39730960d94306d7be414e8d54f4e5c071af1278
author NeilBrown <neilb@cse.unsw.edu.au> 1119399449 -0700
committer Linus Torvalds <torvalds@ppc970.osdl.org> 1119406067 -0700

[PATCH] md: make sure md/bitmap doesn't try to write a page with active writeback

Due to the use of write-behind, it is possible for md to write a page to
the bitmap file that is still completing writeback.  This is not allowed.

With this patch, we detect those cases and either force a sync write, or
back off and try later, as appropriate.

Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>