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| author | Joe Thornber <ejt@redhat.com> | 2013-05-10 14:37:16 +0100 |
|---|---|---|
| committer | Alasdair G Kergon <agk@redhat.com> | 2013-05-10 14:37:16 +0100 |
| commit | f8350daf7af05e3b8cf98e9550de3f623af03fe7 (patch) | |
| tree | 109342db8572f7fa15784ffb8bdf2b3b0dca258c | |
| parent | 042bcef889f4319d366c67fb694f1f2498fcb68e (diff) | |
| download | op-kernel-dev-f8350daf7af05e3b8cf98e9550de3f623af03fe7.zip op-kernel-dev-f8350daf7af05e3b8cf98e9550de3f623af03fe7.tar.gz | |
dm cache: tune migration throttling
Tune the dm cache migration throttling.
i) Issue a tick every second, just in case there's no i/o going through.
ii) Drop the migration threshold right down to something suitable for
background work.
Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
| -rw-r--r-- | drivers/md/dm-cache-target.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/md/dm-cache-target.c b/drivers/md/dm-cache-target.c index 6feaba2..c3c1852 100644 --- a/drivers/md/dm-cache-target.c +++ b/drivers/md/dm-cache-target.c @@ -1445,6 +1445,7 @@ static void do_worker(struct work_struct *ws) static void do_waker(struct work_struct *ws) { struct cache *cache = container_of(to_delayed_work(ws), struct cache, waker); + policy_tick(cache->policy); wake_worker(cache); queue_delayed_work(cache->wq, &cache->waker, COMMIT_PERIOD); } @@ -1886,7 +1887,7 @@ static sector_t calculate_discard_block_size(sector_t cache_block_size, return discard_block_size; } -#define DEFAULT_MIGRATION_THRESHOLD (2048 * 100) +#define DEFAULT_MIGRATION_THRESHOLD 2048 static int cache_create(struct cache_args *ca, struct cache **result) { |
