path: root/Documentation/filesystems/Locking
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authorLinus Torvalds <torvalds@linux-foundation.org>2014-08-16 08:58:47 -0600
committerLinus Torvalds <torvalds@linux-foundation.org>2014-08-16 08:58:47 -0600
commit53b95d6341c142a02538e41bdf1405ef8888bf8b (patch)
treef87d6f57029b6c101c9909cd143de34196c63b1f /Documentation/filesystems/Locking
parentda06df548e2b82848bcc32342234d0f04340a41c (diff)
parent2ece173e4715031c031de9114491eee80a69cf68 (diff)
Merge tag 'locks-v3.17-2' of git://git.samba.org/jlayton/linux
Pull file locking bugfixes from Jeff Layton: "Most of these patches are to fix a long-standing regression that crept in when the BKL was removed from the file-locking code. The code was converted to use a conventional spinlock, but some fl_release_private ops can block and you can end up sleeping inside the lock. There's also a patch to make /proc/locks show delegations as 'DELEG'" * tag 'locks-v3.17-2' of git://git.samba.org/jlayton/linux: locks: update Locking documentation to clarify fl_release_private behavior locks: move locks_free_lock calls in do_fcntl_add_lease outside spinlock locks: defer freeing locks in locks_delete_lock until after i_lock has been dropped locks: don't reuse file_lock in __posix_lock_file locks: don't call locks_release_private from locks_copy_lock locks: show delegations as "DELEG" in /proc/locks
Diffstat (limited to 'Documentation/filesystems/Locking')
1 files changed, 5 insertions, 1 deletions
diff --git a/Documentation/filesystems/Locking b/Documentation/filesystems/Locking
index b18dd177902..f1997e9da61 100644
--- a/Documentation/filesystems/Locking
+++ b/Documentation/filesystems/Locking
@@ -349,7 +349,11 @@ prototypes:
locking rules:
inode->i_lock may block
fl_copy_lock: yes no
-fl_release_private: maybe no
+fl_release_private: maybe maybe[1]
+[1]: ->fl_release_private for flock or POSIX locks is currently allowed
+to block. Leases however can still be freed while the i_lock is held and
+so fl_release_private called on a lease should not block.
----------------------- lock_manager_operations ---------------------------