kernel_optimize_test/fs/gfs2
Vladimir Davydov 3f97b16320 list_lru: add helpers to isolate items
Currently, the isolate callback passed to the list_lru_walk family of
functions is supposed to just delete an item from the list upon returning
LRU_REMOVED or LRU_REMOVED_RETRY, while nr_items counter is fixed by
__list_lru_walk_one after the callback returns.  Since the callback is
allowed to drop the lock after removing an item (it has to return
LRU_REMOVED_RETRY then), the nr_items can be less than the actual number
of elements on the list even if we check them under the lock.  This makes
it difficult to move items from one list_lru_one to another, which is
required for per-memcg list_lru reparenting - we can't just splice the
lists, we have to move entries one by one.

This patch therefore introduces helpers that must be used by callback
functions to isolate items instead of raw list_del/list_move.  These are
list_lru_isolate and list_lru_isolate_move.  They not only remove the
entry from the list, but also fix the nr_items counter, making sure
nr_items always reflects the actual number of elements on the list if
checked under the appropriate lock.

Signed-off-by: Vladimir Davydov <vdavydov@parallels.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Tejun Heo <tj@kernel.org>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Dave Chinner <david@fromorbit.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-12 18:54:10 -08:00
..
acl.c GFS2: Fix crash during ACL deletion in acl max entry check in gfs2_set_acl() 2015-02-10 10:14:56 +00:00
acl.h GFS2: Increase the max number of ACLs 2014-03-19 15:16:24 +00:00
aops.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2014-06-12 10:30:18 -07:00
bmap.c GFS2: Change maxlen variables to size_t 2014-08-21 10:22:23 +01:00
bmap.h GFS2: Clean up journal extent mapping 2014-03-03 13:50:12 +00:00
dentry.c vfs: Remove unnecessary calls of check_submounts_and_drop 2014-10-09 02:38:56 -04:00
dir.c GFS2: use __vmalloc GFP_NOFS for fs-related allocations. 2015-02-04 09:58:41 +00:00
dir.h GFS2: Make rename not save dirent location 2014-10-01 14:06:15 +01:00
export.c vfs: make first argument of dir_context.actor typed 2014-10-31 17:48:54 -04:00
file.c mm: drop vm_ops->remap_pages and generic_file_remap_pages() stub 2015-02-10 14:30:30 -08:00
gfs2.h
glock.c GFS2: Eliminate __gfs2_glock_remove_from_lru 2015-01-09 11:33:13 +00:00
glock.h GFS2: Don't use ENOBUFS when ENOMEM is the correct error code 2014-01-16 10:31:13 +00:00
glops.c GFS2: update freeze code to use freeze/thaw_super on all nodes 2014-11-17 10:36:39 +00:00
glops.h GFS2: update freeze code to use freeze/thaw_super on all nodes 2014-11-17 10:36:39 +00:00
incore.h GFS2: update freeze code to use freeze/thaw_super on all nodes 2014-11-17 10:36:39 +00:00
inode.c GFS2: Eliminate a nonsense goto 2015-01-26 20:58:54 +00:00
inode.h GFS2: Add atomic_open support 2013-06-14 11:17:15 +01:00
Kconfig Finally eradicate CONFIG_HOTPLUG 2013-06-03 14:20:18 -07:00
lock_dlm.c Merge branch 'sched/urgent' into sched/core, to merge fixes before applying new changes 2014-07-28 10:03:00 +02:00
log.c GFS2: update freeze code to use freeze/thaw_super on all nodes 2014-11-17 10:36:39 +00:00
log.h GFS2: remove transaction glock 2014-05-14 10:04:34 +01:00
lops.c GFS2: lops.c: replace 0 by NULL for pointers 2014-04-28 09:41:55 +01:00
lops.h GFS2: Move log buffer lists into transaction 2014-02-24 16:54:54 +00:00
main.c GFS2: update freeze code to use freeze/thaw_super on all nodes 2014-11-17 10:36:39 +00:00
Makefile
meta_io.c mm: non-atomically mark page accessed during page cache allocation where possible 2014-06-04 16:54:10 -07:00
meta_io.h GFS2: Fix address space from page function 2014-03-31 17:48:27 +01:00
ops_fstype.c Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs 2014-12-10 15:43:30 -08:00
quota.c list_lru: add helpers to isolate items 2015-02-12 18:54:10 -08:00
quota.h GFS2: Use RCU/hlist_bl based hash for quotas 2014-01-14 19:27:56 +00:00
recovery.c GFS2: fix sprintf format specifier 2015-01-13 10:48:57 +00:00
recovery.h GFS2: Move recovery variables to journal structure in memory 2014-03-07 09:14:48 +00:00
rgrp.c GFS2: If we use up our block reservation, request more next time 2014-11-03 19:26:54 +00:00
rgrp.h GFS2: If we use up our block reservation, request more next time 2014-11-03 19:26:54 +00:00
super.c GFS2: update freeze code to use freeze/thaw_super on all nodes 2014-11-17 10:36:39 +00:00
super.h GFS2: update freeze code to use freeze/thaw_super on all nodes 2014-11-17 10:36:39 +00:00
sys.c GFS2: fix sprintf format specifier 2015-01-13 10:48:57 +00:00
sys.h GFS2: dlm based recovery coordination 2012-01-11 09:23:05 +00:00
trace_gfs2.h GFS2: Add origin indicator to glock demote tracing 2013-04-10 10:32:05 +01:00
trans.c GFS2: update freeze code to use freeze/thaw_super on all nodes 2014-11-17 10:36:39 +00:00
trans.h GFS2: Split gfs2_trans_add_bh() into two 2013-01-29 10:28:04 +00:00
util.c GFS2: Convert gfs2_lm_withdraw to use fs_err 2014-03-07 09:39:18 +00:00
util.h GFS2: Convert gfs2_lm_withdraw to use fs_err 2014-03-07 09:39:18 +00:00
xattr.c gfs2: use generic posix ACL infrastructure 2014-01-25 23:58:22 -05:00
xattr.h