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Add slow disk diagnosis to ZED

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Slow disk response times can be indicative of a failing drive. ZFS
currently tracks slow I/Os (slower than zio_slow_io_ms) and generates
events (ereport.fs.zfs.delay).  However, no action is taken by ZED,
like is done for checksum or I/O errors.  This change adds slow disk
diagnosis to ZED which is opt-in using new VDEV properties:
  VDEV_PROP_SLOW_IO_N
  VDEV_PROP_SLOW_IO_T

If multiple VDEVs in a pool are undergoing slow I/Os, then it skips
the zpool_vdev_degrade().

Sponsored-By: OpenDrives Inc.
Sponsored-By: Klara Inc.
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Allan Jude <allan@klarasystems.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Co-authored-by: Rob Wing <rob.wing@klarasystems.com>
Signed-off-by: Don Brady <don.brady@klarasystems.com>
Closes #15469
This commit is contained in:
Don Brady
2024-02-08 10:19:52 -07:00
committed by Tony Hutter
parent db65272aef
commit c1c26a77ff
29 changed files with 655 additions and 71 deletions
Download Patch File Download Diff File Expand all files Collapse all files
lib/libzfs/libzfs.abi
+3 -1
View File
@@ -5672,7 +5672,9 @@
<enumerator name='VDEV_PROP_IO_N' value='44'/>
<enumerator name='VDEV_PROP_IO_T' value='45'/>
<enumerator name='VDEV_PROP_RAIDZ_EXPANDING' value='46'/>
<enumerator name='VDEV_NUM_PROPS' value='47'/>
<enumerator name='VDEV_PROP_SLOW_IO_N' value='47'/>
<enumerator name='VDEV_PROP_SLOW_IO_T' value='48'/>
<enumerator name='VDEV_NUM_PROPS' value='49'/>
</enum-decl>
<typedef-decl name='vdev_prop_t' type-id='1573bec8' id='5aa5c90c'/>
<class-decl name='zpool_load_policy' size-in-bits='256' is-struct='yes' visibility='default' id='2f65b36f'>
lib/libzfs/libzfs_pool.c
+2
View File
@@ -5224,6 +5224,8 @@ zpool_get_vdev_prop_value(nvlist_t *nvprop, vdev_prop_t prop, char *prop_name,
case VDEV_PROP_CHECKSUM_T:
case VDEV_PROP_IO_N:
case VDEV_PROP_IO_T:
case VDEV_PROP_SLOW_IO_N:
case VDEV_PROP_SLOW_IO_T:
if (intval == UINT64_MAX) {
(void) strlcpy(buf, "-", len);
} else {
lib/libzfs/libzfs_util.c
+3 -1
View File
@@ -1699,7 +1699,9 @@ zprop_parse_value(libzfs_handle_t *hdl, nvpair_t *elem, int prop,
(prop == VDEV_PROP_CHECKSUM_N ||
prop == VDEV_PROP_CHECKSUM_T ||
prop == VDEV_PROP_IO_N ||
prop == VDEV_PROP_IO_T)) {
prop == VDEV_PROP_IO_T ||
prop == VDEV_PROP_SLOW_IO_N ||
prop == VDEV_PROP_SLOW_IO_T)) {
*ivalp = UINT64_MAX;
}