PR_GET_EFFECTIVE_TIMERSLACK allows process to know its effective timer slack value. Signed-off-by: Kirill A. Shutemov <kirill@xxxxxxxxxxxxx> --- include/linux/prctl.h | 6 ++++++ kernel/sys.c | 3 +++ 2 files changed, 9 insertions(+), 0 deletions(-) diff --git a/include/linux/prctl.h b/include/linux/prctl.h index a3baeb2..3199458 100644 --- a/include/linux/prctl.h +++ b/include/linux/prctl.h @@ -102,4 +102,10 @@ #define PR_MCE_KILL_GET 34 +/* + * Get effective timerslack value for the process. + * It can be higher than PR_GET_TIMERSLACK. + */ +#define PR_GET_EFFECTIVE_TIMERSLACK 35 + #endif /* _LINUX_PRCTL_H */ diff --git a/kernel/sys.c b/kernel/sys.c index 18da702..b2ec8bf 100644 --- a/kernel/sys.c +++ b/kernel/sys.c @@ -1693,6 +1693,9 @@ SYSCALL_DEFINE5(prctl, int, option, unsigned long, arg2, unsigned long, arg3, case PR_GET_TIMERSLACK: error = current->timer_slack_ns; break; + case PR_GET_EFFECTIVE_TIMERSLACK: + error = task_get_effective_timer_slack(current); + break; case PR_SET_TIMERSLACK: if (arg2 <= 0) current->timer_slack_ns = -- 1.7.4.1 -- To unsubscribe from this list: send the line "unsubscribe linux-api" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
