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Steven Whitehouse d2a97a4e99 GFS2: Use kmalloc when possible for ->readdir() 
If we don't need a huge amount of memory in ->readdir() then
we can use kmalloc rather than vmalloc to allocate it. This
should cut down on the greater overheads associated with
vmalloc for smaller directories.

We may be able to eliminate vmalloc entirely at some stage,
but this is easy to do right away.

Also using GFP_NOFS to avoid any issues wrt to deleting inodes
while under a glock, and suggestion from Linus to factor out
the alloc/dealloc.

I've given this a test with a variety of different sized
directories and it seems to work ok.

Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Nick Piggin <npiggin@suse.de>
Cc: Prarit Bhargava <prarit@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-07-28 11:10:03 -07:00
..
acl.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-fixes 2010-05-25 08:17:51 -07:00
acl.h gfs: constify xattr_handler 2010-05-21 18:31:20 -04:00
aops.c kill spurious reference to vmtruncate 2010-05-27 22:15:42 -04:00
bmap.c GFS2: O_TRUNC not working on stuffed files across cluster 2010-07-15 09:05:17 +01:00
bmap.h GFS2: Streamline alloc calculations for writes 2009-01-05 07:39:17 +00:00
dentry.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
dir.c GFS2: Use kmalloc when possible for ->readdir() 2010-07-28 11:10:03 -07:00
dir.h GFS2: Fix bug in gfs2_lock_fs_check_clean() 2009-01-05 07:39:11 +00:00
export.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-nmw 2010-05-21 07:29:15 -07:00
file.c drop unused dentry argument to ->fsync 2010-05-27 22:05:02 -04:00
gfs2.h
glock.c mm: add context argument to shrinker callback 2010-07-19 14:56:17 +10:00
glock.h GFS2: Metadata address space clean up 2010-03-01 14:07:37 +00:00
glops.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
glops.h GFS2: Add a "demote a glock" interface to sysfs 2009-03-24 11:21:22 +00:00
incore.h GFS2: Add some useful messages 2010-05-06 11:03:29 +01:00
inode.c GFS2: Fix kernel NULL pointer dereference by dlm_astd 2010-07-15 09:06:25 +01:00
inode.h GFS2: Rework reclaiming unlinked dinodes 2010-05-21 16:11:36 +01:00
Kconfig GFS2: do not select QUOTA 2010-03-09 10:08:36 +00:00
lock_dlm.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
log.c GFS2: Rework reclaiming unlinked dinodes 2010-05-21 16:11:36 +01:00
log.h GFS2: Rework reclaiming unlinked dinodes 2010-05-21 16:11:36 +01:00
lops.c GFS2: Various gfs2_logd improvements 2010-05-05 09:39:18 +01:00
lops.h
main.c GFS2: Remove space from slab cache name 2010-03-29 14:26:49 +01:00
Makefile GFS2: Rename eattr.[ch] as xattr.[ch] 2009-08-26 18:51:04 +01:00
meta_io.c GFS2: Eliminate useless err variable 2010-05-12 09:52:50 +01:00
meta_io.h GFS2: Metadata address space clean up 2010-03-01 14:07:37 +00:00
ops_fstype.c GFS2: Various gfs2_logd improvements 2010-05-05 09:39:18 +01:00
ops_inode.c kill spurious reference to vmtruncate 2010-05-27 22:15:42 -04:00
quota.c mm: add context argument to shrinker callback 2010-07-19 14:56:17 +10:00
quota.h mm: add context argument to shrinker callback 2010-07-19 14:56:17 +10:00
recovery.c GFS2: Tag all metadata with jid 2009-12-03 11:58:47 +00:00
recovery.h GFS2: Umount recovery race fix 2009-05-19 10:01:18 +01:00
rgrp.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-fixes 2010-05-25 08:17:51 -07:00
rgrp.h 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
super.c GFS2: Add some useful messages 2010-05-06 11:03:29 +01:00
super.h gfs: constify xattr_handler 2010-05-21 18:31:20 -04:00
sys.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-nmw 2010-05-21 07:29:15 -07:00
sys.h GFS2: Remove ancient, unused code 2009-01-05 07:39:13 +00:00
trace_gfs2.h tracing/events: Move TRACE_SYSTEM outside of include guard 2009-07-13 10:59:55 +02:00
trans.c GFS2: Various gfs2_logd improvements 2010-05-05 09:39:18 +01:00
trans.h
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 gfs: constify xattr_handler 2010-05-21 18:31:20 -04:00
xattr.h sanitize xattr handler prototypes 2009-12-16 12:16:49 -05:00