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| author | Peter Zijlstra <peterz@infradead.org> | 2015-06-22 14:16:34 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-09-22 15:25:53 +0200 |
| commit | 7c3f654d8e18942295eeda42f7d75494443980e0 (patch) | |
| tree | b8b4cb3acbb418846eef73c9a296b34434d56b1f /fs/Kconfig | |
| parent | aba37660738325d48c913f3a952a7116d6e6a74b (diff) | |
| download | lwn-7c3f654d8e18942295eeda42f7d75494443980e0.tar.gz lwn-7c3f654d8e18942295eeda42f7d75494443980e0.zip | |
fs/locks: Replace lg_local with a per-cpu spinlock
As Oleg suggested, replace file_lock_list with a structure containing
the hlist head and a spinlock.
This completely removes the lglock from fs/locks.
Suggested-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Al Viro <viro@ZenIV.linux.org.uk>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: dave@stgolabs.net
Cc: der.herr@hofr.at
Cc: paulmck@linux.vnet.ibm.com
Cc: riel@redhat.com
Cc: tj@kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'fs/Kconfig')
| -rw-r--r-- | fs/Kconfig | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/Kconfig b/fs/Kconfig index 2bc7ad775842..3ef62bad8f2b 100644 --- a/fs/Kconfig +++ b/fs/Kconfig @@ -79,6 +79,7 @@ config EXPORTFS_BLOCK_OPS config FILE_LOCKING bool "Enable POSIX file locking API" if EXPERT default y + select PERCPU_RWSEM help This option enables standard file locking support, required for filesystems like NFS and for the flock() system |