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| author | James Bottomley <jejb@mulgrave.il.steeleye.com> | 2007-05-30 23:57:05 -0500 |
|---|---|---|
| committer | James Bottomley <jejb@mulgrave.il.steeleye.com> | 2007-05-30 23:57:05 -0500 |
| commit | 5bc65793cbf8da0d35f19ef025dda22887e79e80 (patch) | |
| tree | 8291998abd73055de6f487fafa174ee2a5d3afee /Documentation/filesystems/directory-locking | |
| parent | 6edae708bf77e012d855a7e2c7766f211d234f4f (diff) | |
| parent | 3f0a6766e0cc5a577805732e5adb50a585c58175 (diff) | |
| download | op-kernel-dev-5bc65793cbf8da0d35f19ef025dda22887e79e80.zip op-kernel-dev-5bc65793cbf8da0d35f19ef025dda22887e79e80.tar.gz | |
[SCSI] Merge up to linux-2.6 head
Conflicts:
drivers/scsi/jazz_esp.c
Same changes made by both SCSI and SPARC trees: problem with UTF-8
conversion in the copyright.
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'Documentation/filesystems/directory-locking')
| -rw-r--r-- | Documentation/filesystems/directory-locking | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/Documentation/filesystems/directory-locking b/Documentation/filesystems/directory-locking index d7099a9..ff7b611 100644 --- a/Documentation/filesystems/directory-locking +++ b/Documentation/filesystems/directory-locking @@ -1,5 +1,6 @@ Locking scheme used for directory operations is based on two -kinds of locks - per-inode (->i_sem) and per-filesystem (->s_vfs_rename_sem). +kinds of locks - per-inode (->i_mutex) and per-filesystem +(->s_vfs_rename_mutex). For our purposes all operations fall in 5 classes: @@ -63,7 +64,7 @@ objects - A < B iff A is an ancestor of B. attempt to acquire some lock and already holds at least one lock. Let's consider the set of contended locks. First of all, filesystem lock is not contended, since any process blocked on it is not holding any locks. -Thus all processes are blocked on ->i_sem. +Thus all processes are blocked on ->i_mutex. Non-directory objects are not contended due to (3). Thus link creation can't be a part of deadlock - it can't be blocked on source |
