Commits on Feb 7, 2024

1. Add slow disk diagnosis to ZED …

   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.
   Co-authored-by: Rob Wing <rob.wing@klarasystems.com>
   Signed-off-by: Don Brady <don.brady@klarasystems.com>

   

   don-brady and Rob Wing committed Feb 7, 2024
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