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authorPeter Zijlstra (Intel) <peterz@infradead.org>2020-01-11 12:53:39 +0300
committerIngo Molnar <mingo@kernel.org>2020-01-28 23:36:44 +0300
commitebc0f83c78a2d26384401ecf2d2fa48063c0ee27 (patch)
tree5549117417df46bf2e73150903f3856246eff870 /include/linux/sched
parent488603b815a7514c7009e6fc339d74ed4a30f343 (diff)
downloadlinux-ebc0f83c78a2d26384401ecf2d2fa48063c0ee27.tar.xz
timers/nohz: Update NOHZ load in remote tick
The way loadavg is tracked during nohz only pays attention to the load upon entering nohz. This can be particularly noticeable if full nohz is entered while non-idle, and then the cpu goes idle and stays that way for a long time. Use the remote tick to ensure that full nohz cpus report their deltas within a reasonable time. [ swood: Added changelog and removed recheck of stopped tick. ] Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Scott Wood <swood@redhat.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Link: https://lkml.kernel.org/r/1578736419-14628-3-git-send-email-swood@redhat.com
Diffstat (limited to 'include/linux/sched')
-rw-r--r--include/linux/sched/nohz.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/sched/nohz.h b/include/linux/sched/nohz.h
index 1abe91ff6e4a..6d67e9a5af6b 100644
--- a/include/linux/sched/nohz.h
+++ b/include/linux/sched/nohz.h
@@ -15,9 +15,11 @@ static inline void nohz_balance_enter_idle(int cpu) { }
#ifdef CONFIG_NO_HZ_COMMON
void calc_load_nohz_start(void);
+void calc_load_nohz_remote(struct rq *rq);
void calc_load_nohz_stop(void);
#else
static inline void calc_load_nohz_start(void) { }
+static inline void calc_load_nohz_remote(struct rq *rq) { }
static inline void calc_load_nohz_stop(void) { }
#endif /* CONFIG_NO_HZ_COMMON */