Qu Wenruo 480b9b4d84 btrfs: extent-tree: Add trace events for space info numbers update ... Add trace event for update_bytes_pinned() and update_bytes_may_use() to detect underflow better. The output would be something like (only showing data part): ## Buffered write start, 16K total ## 2255.954 xfs_io/860 btrfs:update_bytes_may_use:(nil)U: type=DATA old=0 diff=4096 2257.169 sudo/860 btrfs:update_bytes_may_use:(nil)U: type=DATA old=4096 diff=4096 2257.346 sudo/860 btrfs:update_bytes_may_use:(nil)U: type=DATA old=8192 diff=4096 2257.542 sudo/860 btrfs:update_bytes_may_use:(nil)U: type=DATA old=12288 diff=4096 ## Delalloc start ## 3727.853 kworker/u8:3-e/700 btrfs:update_bytes_may_use:(nil)U: type=DATA old=16384 diff=-16384 ## Space cache update ## 3733.132 sudo/862 btrfs:update_bytes_may_use:(nil)U: type=DATA old=0 diff=65536 3733.169 sudo/862 btrfs:update_bytes_may_use:(nil)U: type=DATA old=65536 diff=-65536 3739.868 sudo/862 btrfs:update_bytes_may_use:(nil)U: type=DATA old=0 diff=65536 3739.891 sudo/862 btrfs:update_bytes_may_use:(nil)U: type=DATA old=65536 diff=-65536 These two trace events will allow bcc tool to probe btrfs_space_info changes and detect underflow with more details (e.g. backtrace for each update). Signed-off-by: Qu Wenruo <wqu@suse.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>		2019-07-01 13:34:58 +02:00
..
acpi	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441	2019-06-05 17:37:17 +02:00
asm-generic	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
clocksource	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234	2019-06-19 17:09:07 +02:00
crypto	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
drm	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
dt-bindings	Minor RISC-V fixes and one defconfig update for the v5.2-rc series.	2019-06-29 17:04:21 +08:00
keys	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441	2019-06-05 17:37:17 +02:00
kvm	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234	2019-06-19 17:09:07 +02:00
linux	Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2019-06-29 19:39:17 +08:00
math-emu	math-emu: Use statement expressions to fix Wshift-count-overflow warning	2019-05-31 15:23:25 +08:00
media	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
memory	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
misc	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152	2019-05-30 11:26:32 -07:00
net	ipv6: constify rt6_nexthop()	2019-06-26 13:26:08 -07:00
pcmcia	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
ras
rdma	SPDX update for 5.2-rc4	2019-06-08 12:52:42 -07:00
scsi	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 335	2019-06-05 17:37:06 +02:00
soc	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
sound	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
target
trace	btrfs: extent-tree: Add trace events for space info numbers update	2019-07-01 13:34:58 +02:00
uapi	SPDX update for 5.2-rc6	2019-06-21 09:58:42 -07:00
video	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
xen