Messages in this thread Patch in this message | | | From | cgel.zte@gmail ... | Subject | [PATCH] delayacct: fix incomplete disable operation when switch enable to disable | Date | Tue, 23 Nov 2021 14:03:43 +0000 |
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From: Yang Yang <yang.yang29@zte.com.cn>
When a task is created after delayacct is enabled, kernel will do all the delay accountings for that task. The problems is if user disables delayacct by set /proc/sys/kernel/task_delayacct to zero, only blkio delay accounting is disabled.
Now disable all the kinds of delay accountings when /proc/sys/kernel/task_delayacct sets to zero.
Signed-off-by: Yang Yang <yang.yang29@zte.com.cn> Reported-by: Zeal Robot <zealci@zte.com.cn> --- include/linux/delayacct.h | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+)
diff --git a/include/linux/delayacct.h b/include/linux/delayacct.h index b96d68f310a2..c675cfb6437e 100644 --- a/include/linux/delayacct.h +++ b/include/linux/delayacct.h @@ -131,36 +131,54 @@ static inline __u64 delayacct_blkio_ticks(struct task_struct *tsk) static inline void delayacct_freepages_start(void) { + if (!static_branch_unlikely(&delayacct_key)) + return; + if (current->delays) __delayacct_freepages_start(); } static inline void delayacct_freepages_end(void) { + if (!static_branch_unlikely(&delayacct_key)) + return; + if (current->delays) __delayacct_freepages_end(); } static inline void delayacct_thrashing_start(void) { + if (!static_branch_unlikely(&delayacct_key)) + return; + if (current->delays) __delayacct_thrashing_start(); } static inline void delayacct_thrashing_end(void) { + if (!static_branch_unlikely(&delayacct_key)) + return; + if (current->delays) __delayacct_thrashing_end(); } static inline void delayacct_swapin_start(void) { + if (!static_branch_unlikely(&delayacct_key)) + return; + if (current->delays) __delayacct_swapin_start(); } static inline void delayacct_swapin_end(void) { + if (!static_branch_unlikely(&delayacct_key)) + return; + if (current->delays) __delayacct_swapin_end(); } -- 2.25.1
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