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Allow to control failfast

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Linux defaults to setting "failfast" on BIOs, so that the OS will not
retry IOs that fail, and instead report the error to ZFS.

In some cases, such as errors reported by the HBA driver, not
the device itself, we would wish to retry rather than generating
vdev errors in ZFS. This new property allows that.

This introduces a per vdev option to disable the failfast option.
This also introduces a global module parameter to define the failfast
mask value.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Co-authored-by: Allan Jude <allan@klarasystems.com>
Signed-off-by: Allan Jude <allan@klarasystems.com>
Signed-off-by: Mariusz Zaborski <mariusz.zaborski@klarasystems.com>
Sponsored-by: Seagate Technology LLC
Submitted-by: Klara, Inc.
Closes #14056
This commit is contained in:
Mariusz Zaborski
2022-11-10 22:37:12 +01:00
committed by GitHub
parent 945b407486
commit 16f0fdaddd
9 changed files with 94 additions and 8 deletions
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include/sys/fs/zfs.h
+1
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@@ -355,6 +355,7 @@ typedef enum {
VDEV_PROP_BYTES_TRIM,
VDEV_PROP_REMOVING,
VDEV_PROP_ALLOCATING,
VDEV_PROP_FAILFAST,
VDEV_NUM_PROPS
} vdev_prop_t;
include/sys/vdev_impl.h
+1
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@@ -299,6 +299,7 @@ struct vdev {
uint64_t vdev_islog; /* is an intent log device */
uint64_t vdev_noalloc; /* device is passivated? */
uint64_t vdev_removing; /* device is being removed? */
uint64_t vdev_failfast; /* device failfast setting */
boolean_t vdev_ishole; /* is a hole in the namespace */
uint64_t vdev_top_zap;
vdev_alloc_bias_t vdev_alloc_bias; /* metaslab allocation bias */