tree 9134be532e8fb6d6875fd62d74ee37605094d8b9
parent 24cdc847d9842bdfd85a005ebc39050bcbc7acba
author Filipe Manana <fdmanana@suse.com> 1406572637 +0100
committer Chris Mason <clm@fb.com> 1410986276 -0700

Btrfs: avoid unnecessary switch of path locks to blocking mode

If we need to cow a node, increase the write lock level and retry the
tree search, there's no point of changing the node locks in our path
to blocking mode, as we only waste time and unnecessarily wake up other
tasks waiting on the spinning locks (just to block them again shortly
after) because we release our path before repeating the tree search.

Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Chris Mason <clm@fb.com>