KAMEZAWA Hiroyuki 43d2b11324 tracepoint: add tracepoints for debugging oom_score_adj ... oom_score_adj is used for guarding processes from OOM-Killer. One of problem is that it's inherited at fork(). When a daemon set oom_score_adj and make children, it's hard to know where the value is set. This patch adds some tracepoints useful for debugging. This patch adds 3 trace points. - creating new task - renaming a task (exec) - set oom_score_adj To debug, users need to enable some trace pointer. Maybe filtering is useful as # EVENT=/sys/kernel/debug/tracing/events/task/ # echo "oom_score_adj != 0" > $EVENT/task_newtask/filter # echo "oom_score_adj != 0" > $EVENT/task_rename/filter # echo 1 > $EVENT/enable # EVENT=/sys/kernel/debug/tracing/events/oom/ # echo 1 > $EVENT/enable output will be like this. # grep oom /sys/kernel/debug/tracing/trace bash-7699 [007] d..3 5140.744510: oom_score_adj_update: pid=7699 comm=bash oom_score_adj=-1000 bash-7699 [007] ...1 5151.818022: task_newtask: pid=7729 comm=bash clone_flags=1200011 oom_score_adj=-1000 ls-7729 [003] ...2 5151.818504: task_rename: pid=7729 oldcomm=bash newcomm=ls oom_score_adj=-1000 bash-7699 [002] ...1 5175.701468: task_newtask: pid=7730 comm=bash clone_flags=1200011 oom_score_adj=-1000 grep-7730 [007] ...2 5175.701993: task_rename: pid=7730 oldcomm=bash newcomm=grep oom_score_adj=-1000 Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Acked-by: David Rientjes <rientjes@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2012-01-10 16:30:44 -08:00
..
9p	…
adfs	vfs: switch ->show_options() to struct dentry *	2012-01-06 23:19:54 -05:00
affs	…
afs	…
autofs4	vfs: switch ->show_options() to struct dentry *	2012-01-06 23:19:54 -05:00
befs	…
bfs	…
btrfs	btrfs: pass __GFP_WRITE for buffered write page allocations	2012-01-10 16:30:44 -08:00
cachefiles	…
ceph	ceph: d_alloc_root() may fail	2012-01-09 16:36:12 -05:00
cifs	Merge branch 'for-linus2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2012-01-08 12:19:57 -08:00
coda	…
configfs	…
cramfs	Merge branches 'vfsmount-guts', 'umode_t' and 'partitions' into Z	2012-01-06 23:15:54 -05:00
debugfs	Merge branch 'for-linus2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2012-01-08 12:19:57 -08:00
devpts	devpts: fix double-free on mount failure	2012-01-08 20:19:03 -05:00
dlm	…
ecryptfs	vfs: switch ->show_options() to struct dentry *	2012-01-06 23:19:54 -05:00
efs	…
exofs	Merge branch 'for-linus' of git://git.open-osd.org/linux-open-osd	2012-01-09 12:51:01 -08:00
exportfs	…
ext2	Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs	2012-01-09 12:51:21 -08:00
ext3	Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs	2012-01-09 12:51:21 -08:00
ext4	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2012-01-09 17:37:37 -08:00
fat	Merge branch 'usb-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb	2012-01-09 12:09:47 -08:00
freevxfs	…
fscache	…
fuse	vfs: switch ->show_options() to struct dentry *	2012-01-06 23:19:54 -05:00
gfs2	Merge branch 'pm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm	2012-01-08 13:10:57 -08:00
hfs	vfs: switch ->show_options() to struct dentry *	2012-01-06 23:19:54 -05:00
hfsplus	vfs: switch ->show_options() to struct dentry *	2012-01-06 23:19:54 -05:00
hostfs	vfs: switch ->show_options() to struct dentry *	2012-01-06 23:19:54 -05:00
hpfs	…
hppfs	…
hugetlbfs	…
isofs	isofs: inode leak on mount failure	2012-01-09 10:48:11 -05:00
jbd	Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs	2012-01-09 12:51:21 -08:00
jbd2	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2012-01-08 13:21:22 -08:00
jffs2	vfs: switch ->show_options() to struct dentry *	2012-01-06 23:19:54 -05:00
jfs	Merge branch 'pm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm	2012-01-08 13:10:57 -08:00
lockd	vfs: prefer ->dentry->d_sb to ->mnt->mnt_sb	2012-01-06 23:16:53 -05:00
logfs	…
minix	Merge branch 'for-linus2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2012-01-08 12:19:57 -08:00
ncpfs	vfs: switch ->show_options() to struct dentry *	2012-01-06 23:19:54 -05:00
nfs	Merge branch 'pm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm	2012-01-08 13:10:57 -08:00
nfs_common	…
nfsd	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2012-01-08 13:21:22 -08:00
nilfs2	Merge branch 'pm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm	2012-01-08 13:10:57 -08:00
nls	…
notify	…
ntfs	vfs: switch ->show_options() to struct dentry *	2012-01-06 23:19:54 -05:00
ocfs2	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2012-01-08 13:21:22 -08:00
omfs	…
openpromfs	…
proc	tracepoint: add tracepoints for debugging oom_score_adj	2012-01-10 16:30:44 -08:00
pstore	…
qnx4	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2012-01-08 13:21:22 -08:00
quota	vfs: prefer ->dentry->d_sb to ->mnt->mnt_sb	2012-01-06 23:16:53 -05:00
ramfs	…
reiserfs	Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs	2012-01-09 12:51:21 -08:00
romfs	…
squashfs	…
sysfs	…
sysv	vfs: prefer ->dentry->d_sb to ->mnt->mnt_sb	2012-01-06 23:16:53 -05:00
ubifs	vfs: switch ->show_options() to struct dentry *	2012-01-06 23:19:54 -05:00
udf	Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs	2012-01-09 12:51:21 -08:00
ufs	vfs: switch ->show_options() to struct dentry *	2012-01-06 23:19:54 -05:00
xfs	Merge branch 'for-linus' of git://oss.sgi.com/xfs/xfs	2012-01-09 12:50:15 -08:00
Kconfig	Merge branch 'for-linus' of git://git.open-osd.org/linux-open-osd	2012-01-09 12:51:01 -08:00
Kconfig.binfmt	…
Makefile	Merge branches 'vfsmount-guts', 'umode_t' and 'partitions' into Z	2012-01-06 23:15:54 -05:00
aio.c	…
anon_inodes.c	…
attr.c	…
bad_inode.c	…
binfmt_aout.c	…
binfmt_elf.c	…
binfmt_elf_fdpic.c	…
binfmt_em86.c	…
binfmt_flat.c	…
binfmt_misc.c	vfs: prefer ->dentry->d_sb to ->mnt->mnt_sb	2012-01-06 23:16:53 -05:00
binfmt_script.c	…
binfmt_som.c	…
bio-integrity.c	…
bio.c	…
block_dev.c	…
buffer.c	…
char_dev.c	…
compat.c	…
compat_binfmt_elf.c	…
compat_ioctl.c	…
dcache.c	vfs: new helper - d_make_root()	2012-01-09 19:23:45 -05:00
dcookies.c	…
direct-io.c	…
drop_caches.c	…
eventfd.c	…
eventpoll.c	…
exec.c	tracepoint: add tracepoints for debugging oom_score_adj	2012-01-10 16:30:44 -08:00
fcntl.c	…
fhandle.c	vfs: prefer ->dentry->d_sb to ->mnt->mnt_sb	2012-01-06 23:16:53 -05:00
fifo.c	…
file.c	…
file_table.c	vfs: prevent remount read-only if pending removes	2012-01-06 23:20:13 -05:00
filesystems.c	…
fs-writeback.c	Merge branch 'pm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm	2012-01-08 13:10:57 -08:00
fs_struct.c	…
generic_acl.c	…
inode.c	mm: account reaped page cache on inode cache pruning	2012-01-10 16:30:42 -08:00
internal.h	vfs: protect remounting superblock read-only	2012-01-06 23:20:12 -05:00
ioctl.c	…
ioprio.c	…
libfs.c	…
locks.c	…
mbcache.c	…
mount.h	vfs: keep list of mounts for each superblock	2012-01-06 23:20:12 -05:00
mpage.c	…
namei.c	Merge branches 'vfsmount-guts', 'umode_t' and 'partitions' into Z	2012-01-06 23:15:54 -05:00
namespace.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2012-01-08 13:21:22 -08:00
no-block.c	…
open.c	switch security_path_chmod() to struct path *	2012-01-06 23:16:53 -05:00
pipe.c	…
pnode.c	…
pnode.h	…
posix_acl.c	…
proc_namespace.c	vfs: switch ->show_options() to struct dentry *	2012-01-06 23:19:54 -05:00
read_write.c	…
read_write.h	…
readdir.c	…
select.c	…
seq_file.c	…
signalfd.c	…
splice.c	…
stack.c	…
stat.c	…
statfs.c	…
super.c	vfs: prevent remount read-only if pending removes	2012-01-06 23:20:13 -05:00
sync.c	…
timerfd.c	…
utimes.c	…
xattr.c	…
xattr_acl.c	…