diff options
| author | Isaac Huang <[email protected]> | 2017-05-12 18:28:03 -0600 |
|---|---|---|
| committer | Brian Behlendorf <[email protected]> | 2017-05-12 17:28:03 -0700 |
| commit | 3d6da72d183dc655a7dc8fd59f57748fc5c1806c (patch) | |
| tree | ca6da500e5b88a5beaf9d4ef265eeb5964ff1a36 /module/zfs/vdev_disk.c | |
| parent | 8c54ddd33af92e5defc587a10914493ca85ad60c (diff) | |
Skip spurious resilver IO on raidz vdev
On a raidz vdev, a block that does not span all child vdevs, excluding
its skip sectors if any, may not be affected by a child vdev outage or
failure. In such cases, the block does not need to be resilvered.
However, current resilver algorithm simply resilvers all blocks on a
degraded raidz vdev. Such spurious IO is not only wasteful, but also
adds the risk of overwriting good data.
This patch eliminates such spurious IOs.
Reviewed-by: Gvozden Neskovic <[email protected]>
Reviewed-by: Brian Behlendorf <[email protected]>
Reviewed by: Matthew Ahrens <[email protected]>
Signed-off-by: Isaac Huang <[email protected]>
Closes #5316
Diffstat (limited to 'module/zfs/vdev_disk.c')
| -rw-r--r-- | module/zfs/vdev_disk.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/module/zfs/vdev_disk.c b/module/zfs/vdev_disk.c index 33b7f5d15..3fdf5642b 100644 --- a/module/zfs/vdev_disk.c +++ b/module/zfs/vdev_disk.c @@ -796,6 +796,7 @@ vdev_ops_t vdev_disk_ops = { vdev_disk_io_start, vdev_disk_io_done, NULL, + NULL, vdev_disk_hold, vdev_disk_rele, VDEV_TYPE_DISK, /* name of this vdev type */ |