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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 GitHub
parent 229b9f4ed0
commit cbe882298e
29 changed files with 655 additions and 71 deletions
Download Patch File Download Diff File Expand all files Collapse all files
cmd/zed/agents/fmd_api.h
+2 -1
View File
@@ -151,7 +151,6 @@ extern void fmd_hdl_vdebug(fmd_hdl_t *, const char *, va_list);
extern void fmd_hdl_debug(fmd_hdl_t *, const char *, ...);
extern int32_t fmd_prop_get_int32(fmd_hdl_t *, const char *);
extern int64_t fmd_prop_get_int64(fmd_hdl_t *, const char *);
#define FMD_STAT_NOALLOC 0x0 /* fmd should use caller's memory */
#define FMD_STAT_ALLOC 0x1 /* fmd should allocate stats memory */
@@ -195,10 +194,12 @@ extern size_t fmd_buf_size(fmd_hdl_t *, fmd_case_t *, const char *);
extern void fmd_serd_create(fmd_hdl_t *, const char *, uint_t, hrtime_t);
extern void fmd_serd_destroy(fmd_hdl_t *, const char *);
extern int fmd_serd_exists(fmd_hdl_t *, const char *);
extern int fmd_serd_active(fmd_hdl_t *, const char *);
extern void fmd_serd_reset(fmd_hdl_t *, const char *);
extern int fmd_serd_record(fmd_hdl_t *, const char *, fmd_event_t *);
extern int fmd_serd_fired(fmd_hdl_t *, const char *);
extern int fmd_serd_empty(fmd_hdl_t *, const char *);
extern void fmd_serd_gc(fmd_hdl_t *);
extern id_t fmd_timer_install(fmd_hdl_t *, void *, fmd_event_t *, hrtime_t);
extern void fmd_timer_remove(fmd_hdl_t *, id_t);