Hitoshi Mitake 44fda11460 nilfs2: add a tracepoint for transaction events ... This patch adds a tracepoint for transaction events of nilfs. With the tracepoint, these events can be tracked: begin, abort, commit, trylock, lock, and unlock. Basically, these events have corresponding functions e.g. begin event corresponds nilfs_transaction_begin(). The unlock event is an exception. It corresponds to the iteration in nilfs_transaction_lock(). Only one tracepoint is introcued: nilfs2_transaction_transition. The above events are distinguished with newly introduced enum. With this tracepoint, we can analyse a critical section of segment constructoin. Sample output by tpoint of perf-tools: cp-4457 [000] ...1 63.266220: nilfs2_transaction_transition: sb = ffff8802112b8800 ti = ffff8800bf5ccc58 count = 1 flags = 9 state = BEGIN cp-4457 [000] ...1 63.266221: nilfs2_transaction_transition: sb = ffff8802112b8800 ti = ffff8800bf5ccc58 count = 0 flags = 9 state = COMMIT cp-4457 [000] ...1 63.266221: nilfs2_transaction_transition: sb = ffff8802112b8800 ti = ffff8800bf5ccc58 count = 0 flags = 9 state = COMMIT segctord-4371 [001] ...1 68.261196: nilfs2_transaction_transition: sb = ffff8802112b8800 ti = ffff8800b889bdf8 count = 0 flags = 10 state = TRYLOCK segctord-4371 [001] ...1 68.261280: nilfs2_transaction_transition: sb = ffff8802112b8800 ti = ffff8800b889bdf8 count = 0 flags = 10 state = LOCK segctord-4371 [001] ...1 68.261877: nilfs2_transaction_transition: sb = ffff8802112b8800 ti = ffff8800b889bdf8 count = 1 flags = 10 state = BEGIN segctord-4371 [001] ...1 68.262116: nilfs2_transaction_transition: sb = ffff8802112b8800 ti = ffff8800b889bdf8 count = 0 flags = 18 state = COMMIT segctord-4371 [001] ...1 68.265032: nilfs2_transaction_transition: sb = ffff8802112b8800 ti = ffff8800b889bdf8 count = 0 flags = 18 state = UNLOCK segctord-4371 [001] ...1 132.376847: nilfs2_transaction_transition: sb = ffff8802112b8800 ti = ffff8800b889bdf8 count = 0 flags = 10 state = TRYLOCK This patch also does trivial cleaning of comma usage in collection stage transition event for consistent coding style. Signed-off-by: Hitoshi Mitake <mitake.hitoshi@lab.ntt.co.jp> Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Cc: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2015-11-06 17:50:42 -08:00
..
acpi	Merge branch 'acpi-processor'	2015-11-02 00:50:37 +01:00
asm-generic	Power management and ACPI updates for v4.4-rc1	2015-11-04 18:10:13 -08:00
clocksource
crypto	Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security	2015-11-05 15:32:38 -08:00
drm	drm/dp/mst: make mst i2c transfer code more robust.	2015-10-15 09:06:20 +10:00
dt-bindings	- New Device Support	2015-11-06 10:23:50 -08:00
keys	KEYS: Merge the type-specific data with the payload data	2015-10-21 15:18:36 +01:00
kvm	s390: A bunch of fixes and optimizations for interrupt and time	2015-11-05 16:26:26 -08:00
linux	rbtree: clarify documentation of rbtree_postorder_for_each_entry_safe()	2015-11-06 17:50:42 -08:00
math-emu
media	[media] v4l2: add support for SDR transmitter	2015-10-20 15:40:50 -02:00
memory
misc
net	mm, page_alloc: distinguish between being unable to sleep, unwilling to sleep and avoiding waking kswapd	2015-11-06 17:50:42 -08:00
pcmcia
ras
rdma
rxrpc
scsi
soc
sound	Merge remote-tracking branches 'asoc/fix/rt298', 'asoc/fix/sx', 'asoc/fix/wm8904' and 'asoc/fix/wm8962' into asoc-linus	2015-10-23 08:44:14 +09:00
target	target: Propigate backend read-only to core_tpg_add_lun	2015-09-24 23:17:21 -07:00
trace	nilfs2: add a tracepoint for transaction events	2015-11-06 17:50:42 -08:00
uapi	Merge branch 'akpm' (patches from Andrew)	2015-11-05 23:10:54 -08:00
video
xen	xen/grant-table: Add an helper to iterate over a specific number of grants	2015-10-23 14:20:46 +01:00
Kbuild