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fee852e374
kernel-ark/fs/gfs2
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Steven Whitehouse fee852e374 [GFS2] Shrink gfs2_inode memory by half 
Here is something I spotted (while looking for something entirely
different) the other day.

Rather than using a completion in each and every struct gfs2_holder,
this removes it in favour of hashed wait queues, thus saving a
considerable amount of memory both on the stack (where a number of
gfs2_holder structures are allocated) and in particular in the
gfs2_inode which has 8 gfs2_holder structures embedded within it.

As a result on x86_64 the gfs2_inode shrinks from 2488 bytes to
1912 bytes, a saving of 576 bytes per inode (no thats not a typo!).
In actual practice we get a much better result than that since
now that a gfs2_inode is under the 2048 byte barrier, we get two
per 4k slab page effectively halving the amount of memory required
to store gfs2_inodes.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2007-02-05 13:37:11 -05:00
..
locking [PATCH] severing skbuff.h -> poll.h 2006-12-04 02:00:31 -05:00
acl.c [GFS2] Remove gfs2_check_acl() 2006-11-30 10:37:32 -05:00
acl.h [GFS2] Remove gfs2_check_acl() 2006-11-30 10:37:32 -05:00
bmap.c [GFS2] Tidy up bmap & fix boundary bug 2006-11-30 10:35:49 -05:00
bmap.h [GFS2] Fix bmap to map extents properly 2006-10-20 09:13:40 -04:00
daemon.c [GFS2] Fix journal flush problem 2006-11-30 10:36:42 -05:00
daemon.h [GFS2] Update copyright, tidy up incore.h 2006-09-01 11:05:15 -04:00
dir.c [GFS2] Clean up/speed up readdir 2007-02-05 13:37:04 -05:00
dir.h [GFS2] Clean up/speed up readdir 2007-02-05 13:37:04 -05:00
eaops.c [GFS2] Shrink gfs2_inode (3) - di_mode 2006-11-30 10:34:14 -05:00
eaops.h [GFS2] Extended attribute code style changes 2006-09-05 13:15:18 -04:00
eattr.c [GFS2] Remove gfs2_inode_attr_in 2006-11-30 10:34:52 -05:00
eattr.h [GFS2] gfs2 misc endianness annotations 2006-11-30 10:33:46 -05:00
gfs2.h [GFS2] Update copyright, tidy up incore.h 2006-09-01 11:05:15 -04:00
glock.c [GFS2] Shrink gfs2_inode memory by half 2007-02-05 13:37:11 -05:00
glock.h [GFS2] Clean up/speed up readdir 2007-02-05 13:37:04 -05:00
glops.c [GFS2] Fix journal flush problem 2006-11-30 10:36:42 -05:00
glops.h [GFS2] Make headers compile on their own 2006-09-05 10:39:21 -04:00
incore.h [GFS2] Shrink gfs2_inode memory by half 2007-02-05 13:37:11 -05:00
inode.c [GFS2] make gfs2_change_nlink_i() static 2007-02-05 13:36:49 -05:00
inode.h [GFS2] make gfs2_change_nlink_i() static 2007-02-05 13:36:49 -05:00
Kconfig [GFS2] Fix Kconfig 2006-12-15 12:51:51 -05:00
lm.c [GFS2] don't try to lockfs after shutdown 2007-02-05 13:35:44 -05:00
lm.h [GFS2] Use void * instead of typedef for locking module interface 2006-09-08 10:17:58 -04:00
locking.c [GFS2] Export lm_interface to kernel headers 2006-09-19 08:45:18 -04:00
log.c [GFS2] fs/gfs2/log.c:log_bmap() fix printk format warning 2006-11-30 10:37:04 -05:00
log.h [GFS2] Move gfs2_meta_syncfs() into log.c 2006-11-30 10:36:45 -05:00
lops.c [GFS2] Fix race in logging code 2006-11-30 10:34:55 -05:00
lops.h [GFS2] split and annotate gfs2_log_head 2006-11-30 10:33:14 -05:00
main.c [PATCH] slab: remove kmem_cache_t 2006-12-07 08:39:25 -08:00
Makefile [GFS2] Update copyright, tidy up incore.h 2006-09-01 11:05:15 -04:00
meta_io.c [GFS2] Reduce number of arguments to meta_io.c:getbuf() 2006-11-30 10:36:50 -05:00
meta_io.h [GFS2] Move gfs2_meta_syncfs() into log.c 2006-11-30 10:36:45 -05:00
mount.c [GFS2] Export lm_interface to kernel headers 2006-09-19 08:45:18 -04:00
mount.h [GFS2] Make headers compile on their own 2006-09-05 10:39:21 -04:00
ondisk.c [GFS2] Don't copy meta_header for rgrp in and out 2006-11-30 10:34:36 -05:00
ops_address.c [GFS2] Add writepages for "data=writeback" mounts 2007-02-05 13:37:01 -05:00
ops_address.h [GFS2] Make headers compile on their own 2006-09-05 10:39:21 -04:00
ops_dentry.c [GFS2] Shrink gfs2_inode (3) - di_mode 2006-11-30 10:34:14 -05:00
ops_dentry.h [GFS2] Make headers compile on their own 2006-09-05 10:39:21 -04:00
ops_export.c [GFS2] Clean up/speed up readdir 2007-02-05 13:37:04 -05:00
ops_export.h [GFS2] split and annotate gfs2_inum 2006-11-30 10:33:32 -05:00
ops_file.c [GFS2] Clean up/speed up readdir 2007-02-05 13:37:04 -05:00
ops_file.h [GFS2] Only set inode flags when required 2006-11-30 10:34:45 -05:00
ops_fstype.c [PATCH] Revert bd_mount_mutex back to a semaphore 2007-01-11 18:18:21 -08:00
ops_fstype.h [GFS2] Make headers compile on their own 2006-09-05 10:39:21 -04:00
ops_inode.c [GFS2] Fix gfs2_rename deadlock 2007-02-05 13:36:31 -05:00
ops_inode.h [GFS2] Make headers compile on their own 2006-09-05 10:39:21 -04:00
ops_super.c [GFS2] Fix ordering of page disposal vs. glock_dq 2007-02-05 13:36:24 -05:00
ops_super.h [GFS2] Make headers compile on their own 2006-09-05 10:39:21 -04:00
ops_vm.c [GFS2] Shrink gfs2_inode (4) - di_uid/di_gid 2006-11-30 10:34:17 -05:00
ops_vm.h [GFS2] Make headers compile on their own 2006-09-05 10:39:21 -04:00
quota.c [GFS2] Shrink gfs2_inode (4) - di_uid/di_gid 2006-11-30 10:34:17 -05:00
quota.h [GFS2] Make headers compile on their own 2006-09-05 10:39:21 -04:00
recovery.c [GFS2] Fix indent in recovery.c 2006-12-05 13:34:17 -05:00
recovery.h [GFS2] split and annotate gfs2_log_head 2006-11-30 10:33:14 -05:00
rgrp.c [GFS2] Shrink gfs2_inode (4) - di_uid/di_gid 2006-11-30 10:34:17 -05:00
rgrp.h [GFS2] Fix uninitialised variable 2006-10-12 17:10:15 -04:00
super.c [GFS2] Remove max_atomic_write tunable 2007-02-05 13:37:08 -05:00
super.h [GFS2] split and annotate gfs2_statfs_change 2006-11-30 10:33:38 -05:00
sys.c [GFS2] Remove max_atomic_write tunable 2007-02-05 13:37:08 -05:00
sys.h [GFS2] Make headers compile on their own 2006-09-05 10:39:21 -04:00
trans.c [GFS2] Export lm_interface to kernel headers 2006-09-19 08:45:18 -04:00
trans.h [GFS2] Make headers compile on their own 2006-09-05 10:39:21 -04:00
util.c [PATCH] slab: remove kmem_cache_t 2006-12-07 08:39:25 -08:00
util.h Merge master.kernel.org:/pub/scm/linux/kernel/git/steve/gfs2-2.6-nmw 2006-12-07 09:13:20 -08:00