[PATCH, v10 2/3] hrtimer: implement PR_GET_EFFECTIVE_TIMERSLACK
From: Kirill A. Shutemov <hidden>
Date: 2011-10-11 16:15:42
Also in:
lkml
Subsystem:
the rest · Maintainer:
Linus Torvalds
From: "Kirill A. Shutemov" <redacted> PR_GET_EFFECTIVE_TIMERSLACK allows process to know its effective timer slack value. Signed-off-by: Kirill A. Shutemov <redacted> --- 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 6fecef0..4b86e41 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c@@ -1798,6 +1798,9 @@ 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 =
--
1.7.6.3