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Add knob to disable slow io notifications

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Introduce a new vdev property `VDEV_PROP_SLOW_IO_REPORTING` that
allows users to disable notifications for slow devices.
This prevents ZED and/or ZFSD from degrading the pool due to slow
I/O.

Reviewed-by: Alexander Motin <alexander.motin@TrueNAS.com>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Mariusz Zaborski <oshogbo@FreeBSD.org>
Closes 17477
This commit is contained in:
Mariusz Zaborski
2025-11-11 19:42:17 +01:00
committed by GitHub
parent b4f073b5a6
commit 02fdd26e51
10 changed files with 127 additions and 32 deletions
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man/man7/vdevprops.7
+7 -1
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@@ -45,7 +45,7 @@ section, below.
Every vdev has a set of properties that export statistics about the vdev
as well as control various behaviors.
Properties are not inherited from top-level vdevs, with the exception of
checksum_n, checksum_t, io_n, io_t, slow_io_n, and slow_io_t.
checksum_n, checksum_t, io_n, io_t, slow_io_events, slow_io_n, and slow_io_t.
.Pp
The values of numeric properties can be specified using human-readable suffixes
.Po for example,
@@ -149,6 +149,12 @@ For
.Sy OpenZFS on FreeBSD
defaults see
.Xr zfsd 8 .
The
.It Sy slow_io_events
property controls whether slow I/O events are generated.
Even when disabled, slow I/Os will be included in the
.Nm zpool Cm status Fl s
output.
.It Sy comment
A text comment up to 8192 characters long
.It Sy bootsize