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authorJosh Durgin <josh.durgin@dreamhost.com>2011-11-21 17:11:12 -0800
committerAlex Elder <elder@dreamhost.com>2012-03-22 10:47:52 -0500
commitc666601a935b94cc0f3310339411b6940de751ba (patch)
treeda8afdd9c553dc349f1a1cdd94ab05d4b5dc5449 /net
parent3489b42a72a41d477665ab37f196ae9257180abb (diff)
downloadop-kernel-dev-c666601a935b94cc0f3310339411b6940de751ba.zip
op-kernel-dev-c666601a935b94cc0f3310339411b6940de751ba.tar.gz
rbd: move snap_rwsem to the device, rename to header_rwsem
A new temporary header is allocated each time the header changes, but only the changed properties are copied over. We don't need a new semaphore for each header update. This addresses http://tracker.newdream.net/issues/2174 Signed-off-by: Josh Durgin <josh.durgin@dreamhost.com> Reviewed-by: Alex Elder <elder@dreamhost.com>
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