diff options
| author | Mike Snitzer <snitzer@kernel.org> | 2022-03-26 14:14:00 -0400 |
|---|---|---|
| committer | Mike Snitzer <snitzer@kernel.org> | 2022-05-05 17:31:34 -0400 |
| commit | 442761fd2b297d65d1cb5786249e1e07a19e9122 (patch) | |
| tree | 5f2b1b8f1c25cd74c1e2c0af3ce2e6fed3941c5b /drivers/md/dm-table.c | |
| parent | 563a225c9fd207326c2a2af9d59b4097cb31ce70 (diff) | |
dm: conditionally enable branching for less used features
Use jump_labels to further reduce cost of unlikely branches for zoned
block devices, dm-stats and swap_bios throttling.
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
Diffstat (limited to 'drivers/md/dm-table.c')
| -rw-r--r-- | drivers/md/dm-table.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c index 73ed15d8cfc6..a37c7b763643 100644 --- a/drivers/md/dm-table.c +++ b/drivers/md/dm-table.c @@ -719,6 +719,9 @@ int dm_table_add_target(struct dm_table *t, const char *type, DMWARN("%s: %s: ignoring discards_supported because num_discard_bios is zero.", dm_device_name(t->md), type); + if (tgt->limit_swap_bios && !static_key_enabled(&swap_bios_enabled.key)) + static_branch_enable(&swap_bios_enabled); + return 0; bad: @@ -2040,6 +2043,8 @@ int dm_table_set_restrictions(struct dm_table *t, struct request_queue *q, r = dm_set_zones_restrictions(t, q); if (r) return r; + if (!static_key_enabled(&zoned_enabled.key)) + static_branch_enable(&zoned_enabled); } dm_update_crypto_profile(q, t); |