linux/fs/nilfs2
Joonsoo Kim fe896d1878 mm: introduce page reference manipulation functions
The success of CMA allocation largely depends on the success of
migration and key factor of it is page reference count.  Until now, page
reference is manipulated by direct calling atomic functions so we cannot
follow up who and where manipulate it.  Then, it is hard to find actual
reason of CMA allocation failure.  CMA allocation should be guaranteed
to succeed so finding offending place is really important.

In this patch, call sites where page reference is manipulated are
converted to introduced wrapper function.  This is preparation step to
add tracepoint to each page reference manipulation function.  With this
facility, we can easily find reason of CMA allocation failure.  There is
no functional change in this patch.

In addition, this patch also converts reference read sites.  It will
help a second step that renames page._count to something else and
prevents later attempt to direct access to it (Suggested by Andrew).

Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Acked-by: Michal Nazarewicz <mina86@mina86.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-03-17 15:09:34 -07:00
..
alloc.c nilfs2: fix gcc unused-but-set-variable warnings 2015-11-06 17:50:42 -08:00
alloc.h nilfs2: free unused dat file blocks during garbage collection 2015-11-06 17:50:42 -08:00
bmap.c nilfs2: add bmap function to seek a valid key 2015-04-17 09:04:03 -04:00
bmap.h nilfs2: add bmap function to seek a valid key 2015-04-17 09:04:03 -04:00
btnode.c
btnode.h
btree.c nilfs2: fix gcc uninitialized-variable warnings in powerpc build 2015-11-06 17:50:42 -08:00
btree.h
cpfile.c nilfs2: improve execution time of NILFS_IOCTL_GET_CPINFO ioctl 2015-04-17 09:04:04 -04:00
cpfile.h
dat.c nilfs2: fix gcc unused-but-set-variable warnings 2015-11-06 17:50:42 -08:00
dat.h
dir.c pagemap.h: move dir_pages() over there 2015-06-23 18:02:00 -04:00
direct.c nilfs2: add bmap function to seek a valid key 2015-04-17 09:04:03 -04:00
direct.h
export.h
file.c vfs: remove unused wrapper block_page_mkwrite() 2015-11-11 02:19:33 -05:00
gcinode.c fs: remove mapping->backing_dev_info 2015-01-20 14:03:05 -07:00
ifile.c
ifile.h
inode.c wrappers for ->i_mutex access 2016-01-22 18:04:28 -05:00
ioctl.c wrappers for ->i_mutex access 2016-01-22 18:04:28 -05:00
Kconfig
Makefile nilfs2: integrate sysfs support into driver 2014-08-08 15:57:21 -07:00
mdt.c nilfs2: add tracepoints for analyzing reading and writing metadata files 2015-11-06 17:50:42 -08:00
mdt.h mm, page_alloc: rename __GFP_WAIT to __GFP_RECLAIM 2015-11-06 17:50:42 -08:00
namei.c switch ->get_link() to delayed_call, kill ->put_link() 2015-12-30 13:01:03 -05:00
nilfs.h nilfs2: fix deadlock of segment constructor over I_SYNC flag 2015-02-05 13:35:29 -08:00
page.c mm: introduce page reference manipulation functions 2016-03-17 15:09:34 -07:00
page.h fs: remove mapping->backing_dev_info 2015-01-20 14:03:05 -07:00
recovery.c nilfs2: fix gcc uninitialized-variable warnings in powerpc build 2015-11-06 17:50:42 -08:00
segbuf.c block: remove bio_get_nr_vecs() 2015-08-13 12:32:04 -06:00
segbuf.h
segment.c nilfs2: fix gcc unused-but-set-variable warnings 2015-11-06 17:50:42 -08:00
segment.h nilfs2: add a tracepoint for tracking stage transition of segment construction 2015-11-06 17:50:42 -08:00
sufile.c nilfs2: fix gcc unused-but-set-variable warnings 2015-11-06 17:50:42 -08:00
sufile.h nilfs2: add nilfs_sufile_trim_fs to trim clean segs 2014-04-03 16:21:25 -07:00
super.c kmemcg: account certain kmem allocations to memcg 2016-01-14 16:00:49 -08:00
sysfs.c nilfs2: integrate sysfs support into driver 2014-08-08 15:57:21 -07:00
sysfs.h nilfs2: add /sys/fs/nilfs2/<device>/mounted_snapshots/<snapshot> group 2014-08-08 15:57:21 -07:00
the_nilfs.c nilfs2: deletion of an unnecessary check before the function call "iput" 2014-12-10 17:41:16 -08:00
the_nilfs.h nilfs2: add missing blkdev_issue_flush() to nilfs_sync_fs() 2014-10-14 02:18:20 +02:00