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linux/include/trace/events
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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
..
9p.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
afs.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 36
2019-05-24 17:27:11 +02:00
alarmtimer.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
asoc.h
ASoC: trace: remove snd_soc_codec
2018-04-16 11:53:35 +01:00
bcache.h
bcache: print number of keys in trace_bcache_journal_write
2018-12-13 08:15:54 -07:00
block.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
bpf_test_run.h
selftests: bpf: test writable buffers in raw tps
2019-04-26 19:04:19 -07:00
bridge.h
net: bridge: use rhashtable for fdbs
2017-12-13 15:10:01 -05:00
btrfs.h
btrfs: extent-tree: Add trace events for space info numbers update
2019-07-01 13:34:58 +02:00
cachefiles.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 36
2019-05-24 17:27:11 +02:00
cgroup.h
cgroup: add tracing points for cgroup v2 freezer
2019-04-19 11:26:49 -07:00
clk.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 282
2019-06-05 17:36:37 +02:00
cma.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
compaction.h
mm, compaction: some tracepoints should be defined only when CONFIG_COMPACTION is set
2019-05-14 09:47:46 -07:00
context_tracking.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
cpuhp.h
treewide: Switch printk users from %pf and %pF to %ps and %pS, respectively
2019-04-09 14:19:06 +02:00
devfreq.h
trace: events: add devfreq trace event file
2019-04-16 09:29:18 +09:00
devlink.h
devlink: Add support for direct reporter health state update
2019-03-04 11:00:43 -08:00
dma_fence.h
Merge tag 'trace-v4.15' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
2017-11-17 14:58:01 -08:00
ext4.h
ext4: force inode writes when nfsd calls commit_metadata()
2018-12-19 14:07:58 -05:00
f2fs.h
f2fs: add tracepoint for f2fs_filemap_fault()
2019-05-08 21:23:13 -07:00
fib6.h
ipv6: Add fib6_type and fib6_flags to fib6_result
2019-04-17 23:11:30 -07:00
fib.h
net: Replace nhc_has_gw with nhc_gw_family
2019-04-08 15:22:40 -07:00
filelock.h
fs/locks: rename some lists and pointers.
2018-11-30 11:26:12 -05:00
filemap.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
fs_dax.h
Merge tag 'libnvdimm-for-4.15' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm
2017-11-17 09:51:57 -08:00
fscache.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 36
2019-05-24 17:27:11 +02:00
fsi_master_ast_cf.h
fsi: master-ast-cf: Add new FSI master using Aspeed ColdFire
2018-07-23 15:22:52 +10:00
fsi_master_gpio.h
fsi: master-gpio: Add more tracepoints
2018-07-12 12:02:31 +10:00
fsi.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
gpio.h
tracing: stop making gpio tracing configurable
2019-04-08 15:11:48 +02:00
host1x.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 1
2019-05-21 11:28:39 +02:00
hswadsp.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
huge_memory.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
hwmon.h
hwmon: (core) Add trace events to _attr_show/store functions
2018-10-11 20:07:35 -07:00
i2c.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 36
2019-05-24 17:27:11 +02:00
ib_mad.h
IB/MAD: Add SMP details to MAD tracing
2019-03-27 15:52:01 -03:00
ib_umad.h
IB/UMAD: Add umad trace points
2019-03-27 15:52:01 -03:00
initcall.h
tracing: initcall: Ordered comparison of function pointers
2018-04-26 15:02:46 -04:00
intel_ish.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
intel-sst.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
iommu.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
ipi.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
irq_matrix.h
genirq/matrix: Add tracepoints
2017-09-25 20:38:26 +02:00
irq.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
iscsi.h
scsi: iscsi: Capture iscsi debug messages using tracepoints
2018-12-20 20:03:55 -05:00
jbd2.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
kmem.h
mm: remove cold parameter from free_hot_cold_page*
2017-11-15 18:21:06 -08:00
kvm.h
KVM: Fix stack-out-of-bounds read in write_mmio
2017-12-18 12:57:01 +01:00
kyber.h
kyber: fix wrong strlcpy() size in trace_kyber_latency()
2018-11-12 08:28:37 -07:00
libata.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
lock.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
mce.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
mdio.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
migrate.h
mm, sched/numa: Remove rate-limiting of automatic NUMA balancing migration
2018-10-02 11:31:14 +02:00
mlxsw.h
mlxsw: spectrum_acl: Rename rehash_dis trace
2019-03-31 11:01:23 -07:00
mmc.h
mmc: core: Fix tracepoint print of blk_addr and blksz
2018-03-15 11:15:22 +01:00
mmflags.h
mm: workingset: tell cache transitions from workingset thrashing
2018-10-26 16:26:32 -07:00
module.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
napi.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
nbd.h
nbd: add tracepoints for send/receive timing
2019-04-26 19:04:19 -07:00
neigh.h
trace: events: neigh_update: print new state in string format
2019-02-23 23:22:33 -08:00
net_probe_common.h
net: dccp: Add DCCP sendmsg trace event
2018-01-02 14:27:30 -05:00
net.h
net: add a generic tracepoint for TX queue timeout
2019-05-04 00:41:41 -04:00
nilfs2.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
nmi.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
objagg.h
lib: introduce initial implementation of object aggregation manager
2018-11-15 14:43:43 -08:00
oom.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
page_isolation.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
page_ref.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
pagemap.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
percpu.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
power_cpu_migrate.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
power.h
cpufreq: trace frequency limits change
2018-07-26 10:17:47 +02:00
preemptirq.h
treewide: Switch printk users from %pf and %pF to %ps and %pS, respectively
2019-04-09 14:19:06 +02:00
printk.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
pwc.h
media: usb: pwc: Introduce TRACE_EVENTs for pwc_isoc_handler()
2019-01-16 11:15:11 -05:00
qdisc.h
qdisc: add tracepoint qdisc:qdisc_dequeue for dequeued SKBs
2017-08-16 14:10:10 -07:00
random.h
random: only read from /dev/random after its pool has received 128 bits
2019-04-17 10:30:21 -04:00
rcu.h
Merge tag 'trace-v5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
2019-05-15 16:05:47 -07:00
rdma.h
rdma/ib: Add trace point macros to display human-readable values
2018-01-23 09:44:14 -05:00
regulator.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
rpcgss.h
SUNRPC: Introduce trace points in rpc_auth_gss.ko
2019-02-14 09:20:40 -05:00
rpcrdma.h
xprtrdma: Trace marshaling failures
2019-04-25 15:19:56 -04:00
rpm.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
rseq.h
rseq: Introduce restartable sequences system call
2018-06-06 11:58:31 +02:00
rtc.h
rtc: Add tracepoints for RTC system
2018-02-13 21:30:22 +01:00
rxrpc.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 36
2019-05-24 17:27:11 +02:00
sched.h
sched/fair: do not expose some tracepoints to user if CONFIG_SCHEDSTATS is not set
2019-04-08 09:22:51 -04:00
scsi.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
sctp.h
net: sctp: Add SCTP ACK tracking trace event
2018-01-02 14:27:29 -05:00
signal.h
signal: Distinguish between kernel_siginfo and siginfo
2018-10-03 16:47:43 +02:00
siox.h
siox: add support for tracing
2017-12-19 10:56:24 +01:00
skb.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
smbus.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 36
2019-05-24 17:27:11 +02:00
sock.h
net: expose sk wmem in sock_exceed_buf_limit tracepoint
2018-07-02 22:40:56 +09:00
spi.h
spi/trace: Cap buffer contents at 64 bytes
2019-05-02 10:37:52 +09:00
spmi.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
sunrpc.h
Merge tag 'nfs-for-5.2-1' of git://git.linux-nfs.org/projects/anna/linux-nfs
2019-05-09 14:33:15 -07:00
sunvnet.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
swiotlb.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
syscalls.h
syscalls: Remove start and number from syscall_get_arguments() args
2019-04-05 09:26:43 -04:00
target.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
task.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
tcp.h
tcp: expose sk_state in tcp_retransmit_skb tracepoint
2018-09-26 20:07:19 -07:00
tegra_apb_dma.h
dmaengine: tegra: add tracepoints to driver
2019-01-07 09:52:42 +05:30
thermal_power_allocator.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
thermal.h
cpu_cooling: Drop static-power related stuff
2017-12-07 22:52:01 +01:00
thp.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
timer.h
timer/trace: Improve timer tracing
2019-03-24 20:29:33 +01:00
tlb.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
udp.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
ufs.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 284
2019-06-05 17:36:37 +02:00
v4l2.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
vb2.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
vmscan.h
mm/vmscan: simplify trace_reclaim_flags and trace_shrink_flags
2019-05-14 09:47:51 -07:00
vsock_virtio_transport_common.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
wbt.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
workqueue.h
treewide: Switch printk users from %pf and %pF to %ps and %pS, respectively
2019-04-09 14:19:06 +02:00
writeback.h
mm/page-writeback: introduce tracepoint for wait_on_page_writeback()
2019-05-14 09:47:51 -07:00
xdp.h
bpf: fix redirect to map under tail calls
2018-08-17 15:56:23 -07:00
xen.h
treewide: Switch printk users from %pf and %pF to %ps and %pS, respectively
2019-04-09 14:19:06 +02:00