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Steven Whitehouse b9c93bb7de GFS2: Improve cluster mmap scalability 
The mmap system call grabs a glock when an update to atime maybe
required. It does this in order to ensure that the flags on the
inode are uptodate, but since it will only mark atime for a future
update, an exclusive lock is not required here (one will be taken
later when the actual update is performed).

Also, the lock can be skipped when the mount is marked noatime in
addition to the original check which only looked at the noatime
flag for the inode itself.

This should increase the scalability of the mmap call when multiple
nodes are all mmaping the same file.

Reported-by: Scooter Morris <scooter@cgl.ucsf.edu>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2011-02-02 14:48:10 +00:00
..
acl.c GFS2: Post-VFS scale update for RCU path walk 2011-01-21 09:39:24 +00:00
acl.h fs: provide rcu-walk aware permission i_ops 2011-01-07 17:50:29 +11:00
aops.c fs: kill block_prepare_write 2010-10-25 21:18:20 -04:00
bmap.c GFS2: Fix uninitialised error value in previous patch 2010-11-30 15:46:02 +00:00
bmap.h GFS2: New truncate sequence 2010-09-20 11:18:16 +01:00
dentry.c fs: rcu-walk aware d_revalidate method 2011-01-07 17:50:29 +11:00
dir.c GFS2: Make . and .. qstrs constant 2010-09-20 11:21:09 +01:00
dir.h GFS2: Make . and .. qstrs constant 2010-09-20 11:21:09 +01:00
export.c switch gfs2, close races 2011-01-12 20:02:46 -05:00
file.c GFS2: Improve cluster mmap scalability 2011-02-02 14:48:10 +00:00
gfs2.h [GFS2] Remove remote lock dropping code 2008-06-27 09:39:44 +01:00
glock.c GFS2: Fix glock queue trace point 2011-01-31 09:38:12 +00:00
glock.h GFS2: Use RCU for glock hash table 2011-01-21 09:39:08 +00:00
glops.c GFS2: Use RCU for glock hash table 2011-01-21 09:39:08 +00:00
glops.h GFS2: Add a "demote a glock" interface to sysfs 2009-03-24 11:21:22 +00:00
incore.h GFS2: Use RCU for glock hash table 2011-01-21 09:39:08 +00:00
inode.c GFS2: Fix error path in gfs2_lookup_by_inum() 2011-01-18 14:49:08 +00:00
inode.h GFS2: Fix error path in gfs2_lookup_by_inum() 2011-01-18 14:49:08 +00:00
Kconfig GFS2: No longer experimental 2010-09-20 11:18:46 +01:00
lock_dlm.c GFS2: Use RCU for glock hash table 2011-01-21 09:39:08 +00:00
log.c Merge branch 'v2.6.36-rc8' into for-2.6.37/barrier 2010-10-19 09:13:04 +02:00
log.h GFS2: Rework reclaiming unlinked dinodes 2010-05-21 16:11:36 +01:00
lops.c GFS2: Use RCU for glock hash table 2011-01-21 09:39:08 +00:00
lops.h [GFS2] Only do lo_incore_commit once 2008-03-31 10:39:54 +01:00
main.c GFS2: Use RCU for glock hash table 2011-01-21 09:39:08 +00:00
Makefile GFS2: Rename eattr.[ch] as xattr.[ch] 2009-08-26 18:51:04 +01:00
meta_io.c writeback: remove nonblocking/encountered_congestion references 2010-10-26 16:52:05 -07:00
meta_io.h GFS2: Metadata address space clean up 2010-03-01 14:07:37 +00:00
ops_fstype.c GFS2: Use RCU for glock hash table 2011-01-21 09:39:08 +00:00
ops_inode.c GFS2: Post-VFS scale update for RCU path walk 2011-01-21 09:39:24 +00:00
quota.c GFS2: Allow gfs2 to update quota usage values through the quotactl interface 2010-11-30 10:31:27 +00:00
quota.h mm: add context argument to shrinker callback 2010-07-19 14:56:17 +10:00
recovery.c GFS2: Fix spectator umount issue 2010-09-29 14:20:52 +01:00
recovery.h gfs2: use workqueue instead of slow-work 2010-07-23 13:14:25 +02:00
rgrp.c GFS2: fsck.gfs2 reported statfs error after gfs2_grow 2010-12-07 18:55:07 +00:00
rgrp.h GFS2: fix recursive locking during rindex truncates 2010-11-30 15:41:54 +00:00
super.c GFS2: remove iopen glocks from cache on failed deletes 2011-01-18 14:28:29 +00:00
super.h gfs: constify xattr_handler 2010-05-21 18:31:20 -04:00
sys.c GFS2: Fix type mapping for demote_rq interface 2010-10-06 09:58:44 +01:00
sys.h GFS2: Remove ancient, unused code 2009-01-05 07:39:13 +00:00
trace_gfs2.h GFS2: Don't enforce min hold time when two demotes occur in rapid succession 2010-09-20 11:19:50 +01:00
trans.c GFS2: Various gfs2_logd improvements 2010-05-05 09:39:18 +01:00
trans.h GFS2: reserve more blocks for transactions 2010-09-28 09:44:24 +01:00
util.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
util.h GFS2: Metadata address space clean up 2010-03-01 14:07:37 +00:00
xattr.c GFS2: Clean up duplicated setattr code 2010-11-30 10:30:19 +00:00
xattr.h sanitize xattr handler prototypes 2009-12-16 12:16:49 -05:00