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fs/locks: Replace lg_local with a per-cpu spinlock

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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 <[email protected]>
Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
Cc: Al Viro <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Signed-off-by: Ingo Molnar <[email protected]>
This commit is contained in:
Peter Zijlstra 2015-06-22 14:16:34 +02:00 • committed by Ingo Molnar
commit 7c3f654d8e
2 changed files with 30 additions and 18 deletions
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1
fs/Kconfig
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@ -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