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| author | Mikulas Patocka | 2021-06-25 15:33:02 -0400 |
|---|---|---|
| committer | Mike Snitzer | 2021-06-25 16:04:01 -0400 |
| commit | 95b88f4d71cb953e02206be3c757083601391a0f (patch) | |
| tree | 5330af07d1fdf5a5c2edb48d07fc377b704c532f /Documentation | |
| parent | dc4fa29fe445933f51e08674f3b325547ba52de1 (diff) | |
dm writecache: pause writeback if cache full and origin being written directly
Implementation reuses dm_io_tracker, that until now was only used by
dm-cache, to track if any writes were issued directly to the origin
(due to cache being full) within the last second. If so writeback is
paused for a second.
This change improves performance for when the cache is full and IO is
issued directly to the origin device (rather than through the cache).
Depends-on: d53f1fafec9d ("dm writecache: do direct write if the cache is full")
Suggested-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'Documentation')
0 files changed, 0 insertions, 0 deletions