From: Lars Ellenberg Date: Fri, 17 Dec 2010 20:14:23 +0000 (+0100) Subject: drbd: serialize sending of resync uuid with pending w_send_oos X-Git-Tag: v2.6.39-rc1~37^2~50 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5a22db8968a69bec835d1ed9a96ab3381719e0c0;p=pandora-kernel.git drbd: serialize sending of resync uuid with pending w_send_oos To improve the latency of IO requests during bitmap exchange, we recently allowed writes while waiting for the bitmap, sending "set out-of-sync" information packets for any newly dirtied bits. We have to make sure that the new resync-uuid does not overtake these "set oos" packets. Once the resync-uuid is received, the sync target starts the resync process, and expects the bitmap to only be cleared, not re-set. If we use this protocol extension, we queue the generation and sending of the resync-uuid on the worker, which naturally serializes with all previously queued packets. Signed-off-by: Philipp Reisner Signed-off-by: Lars Ellenberg --- Reading git-diff-tree failed