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-rw-r--r--usr/src/uts/common/fs/zfs/arc.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/usr/src/uts/common/fs/zfs/arc.c b/usr/src/uts/common/fs/zfs/arc.c
index e7e58ab8d9..e88213a491 100644
--- a/usr/src/uts/common/fs/zfs/arc.c
+++ b/usr/src/uts/common/fs/zfs/arc.c
@@ -8360,6 +8360,7 @@ 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);
@@ -8578,7 +8579,8 @@ 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);
}