diff options
| author | Prakash Surya <[email protected]> | 2012-04-27 12:43:49 -0700 |
|---|---|---|
| committer | Brian Behlendorf <[email protected]> | 2012-05-07 11:50:04 -0700 |
| commit | c0e0fc14e3e65e519849dd9fbfb94a6c79d0d149 (patch) | |
| tree | 9cd11c821b31173e2b816045165774ef7630bfa4 /module/spl | |
| parent | cef7605c342a87eb108b6eac919cae737c08a230 (diff) | |
Ignore slab cache age and delay in direct reclaim
When memory pressure triggers direct memory reclaim, a slabs age
and delay should not prevent it from being freed. This patch ensures
these values are ignored, allowing an empty slab to be freed in this
code path no matter the value of its age and delay.
This prevents needless scanning of the partial slabs and has been
observed to significantly reduce the total cpu usage. In addition,
it should allow for snappier reclaim under memory pressure.
Signed-off-by: Prakash Surya <[email protected]>
Signed-off-by: Brian Behlendorf <[email protected]>
Closes #102
Diffstat (limited to 'module/spl')
| -rw-r--r-- | module/spl/spl-kmem.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/module/spl/spl-kmem.c b/module/spl/spl-kmem.c index eadf1cb17..361030b18 100644 --- a/module/spl/spl-kmem.c +++ b/module/spl/spl-kmem.c @@ -1916,7 +1916,8 @@ spl_kmem_cache_reap_now(spl_kmem_cache_t *skc, int count) if (skc->skc_reclaim) skc->skc_reclaim(skc->skc_private); - spl_slab_reclaim(skc, count, 0); + /* Reclaim from the cache, ignoring it's age and delay. */ + spl_slab_reclaim(skc, count, 1); clear_bit(KMC_BIT_REAPING, &skc->skc_flags); atomic_dec(&skc->skc_ref); |