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authorJuri Lelli <juri.lelli@gmail.com>2017-12-12 14:10:24 +0300
committerIngo Molnar <mingo@kernel.org>2018-01-10 13:30:31 +0300
commit34be39305a77b8b1ec9f279163c7cdb6cc719b91 (patch)
tree1d970e5d92e508630d575814a3bae1181ed85348 /include
parent7332dec055f2457c386032f7e9b2991eb05c2a0a (diff)
downloadlinux-34be39305a77b8b1ec9f279163c7cdb6cc719b91.tar.xz
sched/deadline: Implement "runtime overrun signal" support
This patch adds the possibility of getting the delivery of a SIGXCPU signal whenever there is a runtime overrun. The request is done through the sched_flags field within the sched_attr structure. Forward port of https://lkml.org/lkml/2009/10/16/170 Tested-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Juri Lelli <juri.lelli@gmail.com> Signed-off-by: Claudio Scordino <claudio@evidence.eu.com> Signed-off-by: Luca Abeni <luca.abeni@santannapisa.it> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Tommaso Cucinotta <tommaso.cucinotta@sssup.it> Link: http://lkml.kernel.org/r/1513077024-25461-1-git-send-email-claudio@evidence.eu.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/sched.h4
-rw-r--r--include/uapi/linux/sched.h5
2 files changed, 9 insertions, 0 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h
index d2588263a989..274a449c805a 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -472,11 +472,15 @@ struct sched_dl_entity {
* has not been executed yet. This flag is useful to avoid race
* conditions between the inactive timer handler and the wakeup
* code.
+ *
+ * @dl_overrun tells if the task asked to be informed about runtime
+ * overruns.
*/
unsigned int dl_throttled : 1;
unsigned int dl_boosted : 1;
unsigned int dl_yielded : 1;
unsigned int dl_non_contending : 1;
+ unsigned int dl_overrun : 1;
/*
* Bandwidth enforcement timer. Each -deadline task has its
diff --git a/include/uapi/linux/sched.h b/include/uapi/linux/sched.h
index 30a9e51bbb1e..22627f80063e 100644
--- a/include/uapi/linux/sched.h
+++ b/include/uapi/linux/sched.h
@@ -49,5 +49,10 @@
*/
#define SCHED_FLAG_RESET_ON_FORK 0x01
#define SCHED_FLAG_RECLAIM 0x02
+#define SCHED_FLAG_DL_OVERRUN 0x04
+
+#define SCHED_FLAG_ALL (SCHED_FLAG_RESET_ON_FORK | \
+ SCHED_FLAG_RECLAIM | \
+ SCHED_FLAG_DL_OVERRUN)
#endif /* _UAPI_LINUX_SCHED_H */