diff options
| author | Mikulas Patocka <mpatocka@redhat.com> | 2021-06-28 09:59:37 -0400 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2021-06-28 16:30:13 -0400 |
| commit | 5c0de3d72f8c05678ed769bea24e98128f7ab570 (patch) | |
| tree | 9d41547dfdf367e5969af1244180d48564a1cc5b /drivers/md/dm-io-tracker.h | |
| parent | 95b88f4d71cb953e02206be3c757083601391a0f (diff) | |
dm writecache: make writeback pause configurable
Commit 95b88f4d71cb953e02206be3c757083601391a0f ("dm writecache: pause
writeback if cache full and origin being written directly") introduced a
code that pauses cache flushing if we are issuing writes directly to the
origin.
Improve that initial commit by making the timeout code configurable
(via the option "pause_writeback"). Also change the default from 1s to
3s because it performed better.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md/dm-io-tracker.h')
| -rw-r--r-- | drivers/md/dm-io-tracker.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/md/dm-io-tracker.h b/drivers/md/dm-io-tracker.h index 1dcf01f9f066..bdcc6273ebf0 100644 --- a/drivers/md/dm-io-tracker.h +++ b/drivers/md/dm-io-tracker.h @@ -45,6 +45,18 @@ static inline bool dm_iot_idle_for(struct dm_io_tracker *iot, unsigned long j) return r; } +static inline unsigned long dm_iot_idle_time(struct dm_io_tracker *iot) +{ + unsigned long r = 0; + + spin_lock_irq(&iot->lock); + if (!iot->in_flight) + r = jiffies - iot->idle_time; + spin_unlock_irq(&iot->lock); + + return r; +} + static inline void dm_iot_io_begin(struct dm_io_tracker *iot, sector_t len) { spin_lock_irq(&iot->lock); |