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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
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cmd/zinject/zinject.c
+16
View File
@@ -1083,6 +1083,22 @@ main(int argc, char **argv)
libzfs_fini(g_zfs);
return (1);
}
if (record.zi_nlanes) {
switch (io_type) {
case ZIO_TYPE_READ:
case ZIO_TYPE_WRITE:
case ZIO_TYPES:
break;
default:
(void) fprintf(stderr, "I/O type for a delay "
"must be 'read' or 'write'\n");
usage();
libzfs_fini(g_zfs);
return (1);
}
}
if (!error)
error = ENXIO;