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(parent: b307d46) | patch
vfs: drop conditional inode prefetch in __do_lookup_rcu
authorLinus Torvalds <torvalds@linux-foundation.org>
Thu, 21 Jul 2011 18:01:42 +0000 (11:01 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Thu, 21 Jul 2011 18:01:42 +0000 (11:01 -0700)
commitb91da88fed84843313a1b6fd1b1c834a24bbcf9e
tree0c9456266a09f247a875fd3b55073ad42dc7445dtree | snapshot (tar.gz zip)
parentb307d4655a71749ac3f91c6dbe33d28cc026ceebcommit | diff
vfs: drop conditional inode prefetch in __do_lookup_rcu

It seems to hurt performance in real life.  Yes, the inode will be used
later, but the conditional doesn't seem to predict all that well
(negative dentries are not uncommon) and it looks like the cost of
prefetching is simply higher than depending on the cache doing the right
thing.

As usual.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
fs/dcache.c diff | blob | blame | history