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fcntl.2: The kernel does not perform deadlock detection for OFD locks 

See kernel commit 57b65325fe34ec4c917bc4e555144b4a94d9e1f7
And this mail thread:

    http://thread.gmane.org/gmane.linux.file-systems/81318/focus=81327
    From: Jeff Layton <jlayton <at> redhat.com>
    Subject: [PATCH v5 13/14] locks: skip deadlock detection on FL_FILE_PVT locks
    Date: 2014-01-09 14:19:46 GMT

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Michael Kerrisk 2014-05-19 15:11:02 +02:00
parent d20d9d33ab
commit d2e429c1a8
1 changed files with 7 additions and 0 deletions
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man2/fcntl.2
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@ -563,6 +563,13 @@ then details about one of these locks are returned via
.IR lock ,
as described above for
.BR F_GETLK .
.PP
In the current implementation,
.\" commit 57b65325fe34ec4c917bc4e555144b4a94d9e1f7
no deadlock detection is performed for open file description locks.
(This contrasts with process-associated record locks,
for which the kernel does perform deadlock detection.)
.\"
.SS Mandatory locking
.IR Warning :
the Linux implementation of mandatory locking is unreliable.