Neil Brown efe3114318 Don't acknowlege that stripe-expand is complete until it really is.
We shouldn't acknowledge that a stripe has been expanded (When
reshaping a raid5 by adding a device) until the moved data has
actually been written out.  However we are currently
acknowledging (by calling md_done_sync) when the POST_XOR
is complete and before the write.

So track in s.locked whether there are pending writes, and don't
call md_done_sync yet if there are.

Note: we all set R5_LOCKED on devices which are are about to
read from.  This probably isn't technically necessary, but is
usually done when writing a block, and justifies the use of
s.locked here.

This bug can lead to a crash if an array is stopped while an reshape
is in progress.

Cc: <stable@kernel.org>
Signed-off-by: Neil Brown <neilb@suse.de>
2008-06-28 08:31:14 +10:00
..
2008-05-24 09:56:09 -07:00
2008-03-28 14:45:22 -07:00
2008-04-25 13:26:55 +01:00
2008-04-25 13:26:57 +01:00
2008-02-08 02:10:16 +00:00
2008-04-25 13:26:57 +01:00
2008-04-25 13:26:55 +01:00
2008-02-08 02:10:35 +00:00
2008-04-25 13:26:57 +01:00
2008-04-25 13:26:55 +01:00
2008-04-25 13:26:44 +01:00
2008-02-08 02:11:24 +00:00
2008-04-25 13:26:53 +01:00
2008-02-08 02:10:32 +00:00
2008-04-25 13:26:55 +01:00
2008-02-06 10:41:18 -08:00