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| author | Josef Bacik <josef@toxicpanda.com> | 2020-10-09 15:28:19 +0200 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2021-02-08 22:58:58 +0100 |
| commit | ac1ea10e757a57fb61512ae9beb2ef67e5340e31 (patch) | |
| tree | dab384f192cb229fcbe3929615fb502cb2debc63 /arch/microblaze | |
| parent | btrfs: make flush_space take a enum btrfs_flush_state instead of int (diff) | |
| download | linux-ac1ea10e757a57fb61512ae9beb2ef67e5340e31.tar.xz linux-ac1ea10e757a57fb61512ae9beb2ef67e5340e31.zip | |
btrfs: add a trace point for reserve tickets
While debugging a ENOSPC related performance problem I needed to see the
time difference between start and end of a reserve ticket, so add a
trace point to report when we handle a reserve ticket.
I opted to spit out start_ns itself without calculating the difference
because there could be a gap between enabling the tracepoint and setting
start_ns. Doing it this way allows us to filter on 0 start_ns so we
don't get bogus entries, and we can easily calculate the time difference
with bpftrace or something else.
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'arch/microblaze')
0 files changed, 0 insertions, 0 deletions