c/mirror_zfs
1
0
Fork 0
mirror of https://git.proxmox.com/git/mirror_zfs.git synced 2026-05-22 02:27:36 +03:00
Code Issues Packages Projects Releases Wiki Activity

Allow kicking a taskq to spawn more threads

Browse Source 
This patch add a module parameter spl_taskq_kick. When writing non-zero value
to it, it will scan all the taskq, if a taskq contains a task pending for more
than 5 seconds, it will be forced to spawn a new thread. This is use as an
emergency recovery from deadlock, not a general solution.

Signed-off-by: Chunwei Chen <david.chen@osnexus.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #529
This commit is contained in:
Chunwei Chen
2016-01-27 16:55:14 -08:00
committed by Brian Behlendorf
parent d112232f5e
commit 8f3b403a73
3 changed files with 75 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
man/man5/spl-module-parameters.5
+14
View File
@@ -250,6 +250,20 @@ may be overridden for non-standard configurations.
Default value: \fB/etc/hostid\fR
.RE
.sp
.ne 2
.na
\fBspl_taskq_kick\fR (uint)
.ad
.RS 12n
Kick stuck taskq to spawn threads. When writing a non-zero value to it, it will
scan all the taskqs. If any of them have a pending task more than 5 seconds old,
it will kick it to spawn more threads. This can be used if you find a rare
deadlock occurs because one or more taskqs didn't spawn a thread when it should.
.sp
Default value: \fB0\fR
.RE
.sp
.ne 2
.na