| commit | 2de8807b25de6d24476923121e3b20146fe8216b | |
| author | Amir Goldstein <amir73il@users.sf.net> | |
| Tue, 10 May 2011 01:48:13 +0000 (9 21:48 -0400) | ||
| committer | Theodore Ts'o <tytso@mit.edu> | |
| Tue, 10 May 2011 01:48:13 +0000 (9 21:48 -0400) | ||
| tree | 083909f3bad86d16a1a65511771945b2ccbb917f | treesnapshot (tar.gz zip) |
| parent | e73a347b7723757bb5fb5c502814dc205a7f496d | commitdiff |
ext4: synchronize ext4_mb_init_group() with buddy page lock
The old routines ext4_mb_[get|put]_buddy_cache_lock(), which used
to take grp->alloc_sem for all groups on the buddy page have been
replaced with the routines ext4_mb_[get|put]_buddy_page_lock().
The new routines take both buddy and bitmap page locks to protect
against concurrent init of groups on the same buddy page.
The GROUP_NEED_INIT flag is tested again under page lock to check
if the group was initialized by another caller.
Signed-off-by: Amir Goldstein <amir73il@users.sf.net>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
The old routines ext4_mb_[get|put]_buddy_cache_lock(), which used
to take grp->alloc_sem for all groups on the buddy page have been
replaced with the routines ext4_mb_[get|put]_buddy_page_lock().
The new routines take both buddy and bitmap page locks to protect
against concurrent init of groups on the same buddy page.
The GROUP_NEED_INIT flag is tested again under page lock to check
if the group was initialized by another caller.
Signed-off-by: Amir Goldstein <amir73il@users.sf.net>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
| fs/ext4/mballoc.c | diffblobblamehistory |