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authorLinus Torvalds <torvalds@linux-foundation.org>2009-04-03 18:14:44 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2009-04-03 18:14:44 -0400
commitb983471794e568fd71fa767da77a62ba517c3e63 (patch)
tree92a1cc26c4846b49d90225d004ba1b7bd6fe3d81 /fs/btrfs/locking.c
parent5a3ae276057840f0e60664c12fc3ef80aa59d1d4 (diff)
parentc293498be69816087746161338de4b81efdf69fc (diff)
Merge git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable
* git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable: Btrfs: BUG to BUG_ON changes Btrfs: remove dead code Btrfs: remove dead code Btrfs: fix typos in comments Btrfs: remove unused ftrace include Btrfs: fix __ucmpdi2 compile bug on 32 bit builds Btrfs: free inode struct when btrfs_new_inode fails Btrfs: fix race in worker_loop Btrfs: add flushoncommit mount option Btrfs: notreelog mount option Btrfs: introduce btrfs_show_options Btrfs: rework allocation clustering Btrfs: Optimize locking in btrfs_next_leaf() Btrfs: break up btrfs_search_slot into smaller pieces Btrfs: kill the pinned_mutex Btrfs: kill the block group alloc mutex Btrfs: clean up find_free_extent Btrfs: free space cache cleanups Btrfs: unplug in the async bio submission threads Btrfs: keep processing bios for a given bdev if our proc is batching
Diffstat (limited to 'fs/btrfs/locking.c')
-rw-r--r--fs/btrfs/locking.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/btrfs/locking.c b/fs/btrfs/locking.c
index a5310c0f41e2..1c36e5cd8f55 100644
--- a/fs/btrfs/locking.c
+++ b/fs/btrfs/locking.c
@@ -60,8 +60,8 @@ void btrfs_clear_lock_blocking(struct extent_buffer *eb)
60 60
61/* 61/*
62 * unfortunately, many of the places that currently set a lock to blocking 62 * unfortunately, many of the places that currently set a lock to blocking
63 * don't end up blocking for every long, and often they don't block 63 * don't end up blocking for very long, and often they don't block
64 * at all. For a dbench 50 run, if we don't spin one the blocking bit 64 * at all. For a dbench 50 run, if we don't spin on the blocking bit
65 * at all, the context switch rate can jump up to 400,000/sec or more. 65 * at all, the context switch rate can jump up to 400,000/sec or more.
66 * 66 *
67 * So, we're still stuck with this crummy spin on the blocking bit, 67 * So, we're still stuck with this crummy spin on the blocking bit,