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| author | Peter Zijlstra <peterz@infradead.org> | 2021-05-04 22:43:32 +0200 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2021-05-12 11:43:25 +0200 |
| commit | e4042ad492357fa995921376462b04a025dd53b6 (patch) | |
| tree | 17a443a2b9b1be2276664e026f63e0c6b97127dd /Documentation | |
| parent | eee4d9fee2544389e5ce5697ed92db67c86d7a9f (diff) | |
| download | linux-e4042ad492357fa995921376462b04a025dd53b6.tar.gz linux-e4042ad492357fa995921376462b04a025dd53b6.tar.bz2 linux-e4042ad492357fa995921376462b04a025dd53b6.zip | |
delayacct: Default disabled
Assuming this stuff isn't actually used much; disable it by default
and avoid allocating and tracking the task_delay_info structure.
taskstats is changed to still report the regular sched and sched_info
and only skip the missing task_delay_info fields instead of not
reporting anything.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Ingo Molnar <mingo@kernel.org>
Link: https://lkml.kernel.org/r/20210505111525.308018373@infradead.org
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/accounting/delay-accounting.rst | 8 | ||||
| -rw-r--r-- | Documentation/admin-guide/kernel-parameters.txt | 2 |
2 files changed, 5 insertions, 5 deletions
diff --git a/Documentation/accounting/delay-accounting.rst b/Documentation/accounting/delay-accounting.rst index 7cc7f5852da0..f20b282d6de0 100644 --- a/Documentation/accounting/delay-accounting.rst +++ b/Documentation/accounting/delay-accounting.rst @@ -69,13 +69,13 @@ Compile the kernel with:: CONFIG_TASK_DELAY_ACCT=y CONFIG_TASKSTATS=y -Delay accounting is enabled by default at boot up. -To disable, add:: +Delay accounting is disabled by default at boot up. +To enable, add:: - nodelayacct + delayacct to the kernel boot options. The rest of the instructions -below assume this has not been done. +below assume this has been done. After the system has booted up, use a utility similar to getdelays.c to access the delays diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index cb89dbdedc46..ef5048c127a3 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -3244,7 +3244,7 @@ noclflush [BUGS=X86] Don't use the CLFLUSH instruction - nodelayacct [KNL] Disable per-task delay accounting + delayacct [KNL] Enable per-task delay accounting nodsp [SH] Disable hardware DSP at boot time. |