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(parent: b4cb6ef) | patch
bcache: avoid unncessary cache prefetch bch_btree_node_get()
authorColy Li <colyli@suse.de>
Thu, 9 Aug 2018 07:48:44 +0000 (15:48 +0800)
committerJens Axboe <axboe@kernel.dk>
Thu, 9 Aug 2018 14:21:05 +0000 (08:21 -0600)
commitc2e8dcf7fa43ed236cb341c33aa3a75687557c43
tree76e7706cf9a9be055724727375fd452930a284batree | snapshot
parentb4cb6efc1af7da2fa1e9ff0eaf90e2be02cfdf5fcommit | diff
bcache: avoid unncessary cache prefetch bch_btree_node_get()

In bch_btree_node_get() the read-in btree node will be partially
prefetched into L1 cache for following bset iteration (if there is).
But if the btree node read is failed, the perfetch operations will
waste L1 cache space. This patch checkes whether read operation and
only does cache prefetch when read I/O succeeded.

Signed-off-by: Coly Li <colyli@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
drivers/md/bcache/btree.c diff | blob | history
ep93xx device tree rework repo: git://git.maquefel.me/linux.git