diff options
| author | Chunwei Chen <[email protected]> | 2016-12-01 10:06:27 -0800 |
|---|---|---|
| committer | Brian Behlendorf <[email protected]> | 2016-12-01 11:06:27 -0700 |
| commit | 493492559e32aa77ff8a5b32572afab5b848a53b (patch) | |
| tree | 6625b9ad7cb203ae0a479ca801ba2a467096d1bf /man/man5 | |
| parent | cbba7146676dd145f373bcbe4f4f435d9100ddbb (diff) | |
Limit number of tasks shown in taskq proc
To prevent holding tq_lock for too long.
Before zfsonlinux/zfs@8e71ab9, hogging delay tasks and cat /proc/spl/taskq
would easily cause a lockup. While that bug has been fixed. It's probably
still a good idea to do this just in case task lists grow too large.
Reviewed-by: Tim Chase <[email protected]>
Reviewed-by: Brian Behlendorf <[email protected]>
Signed-off-by: Chunwei Chen <[email protected]>
Closes #586
Diffstat (limited to 'man/man5')
| -rw-r--r-- | man/man5/spl-module-parameters.5 | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/man/man5/spl-module-parameters.5 b/man/man5/spl-module-parameters.5 index 1b760243e..97241fd53 100644 --- a/man/man5/spl-module-parameters.5 +++ b/man/man5/spl-module-parameters.5 @@ -326,3 +326,18 @@ configurations. .sp Default value: \fB4\fR .RE + +.sp +.ne 2 +.na +\fBspl_max_show_tasks\fR (uint) +.ad +.RS 12n +The maximum number of tasks per pending list in each taskq shown in +/proc/spl/{taskq,taskq-all}. Write 0 to turn off the limit. The proc file will +walk the lists with lock held, reading it could cause a lock up if the list +grow too large without limiting the output. "(truncated)" will be shown if the +list is larger than the limit. +.sp +Default value: \fB512\fR +.RE |