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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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include/sys/fm/fs/zfs.h
+2
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@@ -82,6 +82,8 @@ extern "C" {
#define FM_EREPORT_PAYLOAD_ZFS_VDEV_CKSUM_T "vdev_cksum_t"
#define FM_EREPORT_PAYLOAD_ZFS_VDEV_IO_N "vdev_io_n"
#define FM_EREPORT_PAYLOAD_ZFS_VDEV_IO_T "vdev_io_t"
#define FM_EREPORT_PAYLOAD_ZFS_VDEV_SLOW_IO_N "vdev_slow_io_n"
#define FM_EREPORT_PAYLOAD_ZFS_VDEV_SLOW_IO_T "vdev_slow_io_t"
#define FM_EREPORT_PAYLOAD_ZFS_VDEV_DELAYS "vdev_delays"
#define FM_EREPORT_PAYLOAD_ZFS_PARENT_GUID "parent_guid"
#define FM_EREPORT_PAYLOAD_ZFS_PARENT_TYPE "parent_type"