diff options
| author | George Amanakis <[email protected]> | 2021-01-28 18:20:03 +0100 |
|---|---|---|
| committer | Brian Behlendorf <[email protected]> | 2021-01-28 11:39:24 -0800 |
| commit | a1a13869654a038e8a64ae8583494b5d8af24fdd (patch) | |
| tree | a7d6741290c93b2431af747ce36e706c6f84e582 | |
| parent | 43eaef6de817dab3e098488f8e02a11fe57944d0 (diff) | |
Avoid updating the L2ARC device header unnecessarily
If we do not write any buffers to the cache device and the evict hand
has not advanced do not update the cache device header.
Reviewed-by: Brian Behlendorf <[email protected]>
Signed-off-by: George Amanakis <[email protected]>
Closes #11522
Closes #11537
| -rw-r--r-- | module/zfs/arc.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/module/zfs/arc.c b/module/zfs/arc.c index a6c293933..0e40d1fc5 100644 --- a/module/zfs/arc.c +++ b/module/zfs/arc.c @@ -8925,6 +8925,7 @@ l2arc_write_buffers(spa_t *spa, l2arc_dev_t *dev, uint64_t target_sz) l2arc_write_callback_t *cb = NULL; zio_t *pio, *wzio; uint64_t guid = spa_load_guid(spa); + l2arc_dev_hdr_phys_t *l2dhdr = dev->l2ad_dev_hdr; ASSERT3P(dev->l2ad_vdev, !=, NULL); @@ -9153,7 +9154,8 @@ l2arc_write_buffers(spa_t *spa, l2arc_dev_t *dev, uint64_t target_sz) * Although we did not write any buffers l2ad_evict may * have advanced. */ - l2arc_dev_hdr_update(dev); + if (dev->l2ad_evict != l2dhdr->dh_evict) + l2arc_dev_hdr_update(dev); return (0); } |