From b201fa67371862229f27a1f022196423aa5c7381 Mon Sep 17 00:00:00 2001 From: "Paul E. McKenney" Date: Fri, 25 Nov 2016 00:07:23 -0800 Subject: rcu: Remove short-term CPU kicking Commit 4914950aaa12d ("rcu: Stop treating in-kernel CPU-bound workloads as errors") added a (relatively) short-timeout call to resched_cpu(). This was inspired by as issue that was fixed by b7e7ade34e61 ("sched/core: Fix remote wakeups"). But given that this issue was fixed, it is time for the current commit to remove this call to resched_cpu(). Reported-by: Byungchul Park Signed-off-by: Paul E. McKenney Reviewed-by: Josh Triplett --- kernel/rcu/tree.c | 5 ----- 1 file changed, 5 deletions(-) (limited to 'kernel/rcu') diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c index 0e61b62e3f4a..5a4aaad75e76 100644 --- a/kernel/rcu/tree.c +++ b/kernel/rcu/tree.c @@ -1220,11 +1220,6 @@ static int rcu_implicit_dynticks_qs(struct rcu_data *rdp, rdp->rsp->jiffies_resched += 5; /* Re-enable beating. */ } - /* And if it has been a really long time, kick the CPU as well. */ - if (ULONG_CMP_GE(jiffies, - rdp->rsp->gp_start + 2 * jiffies_till_sched_qs) || - ULONG_CMP_GE(jiffies, rdp->rsp->gp_start + jiffies_till_sched_qs)) - resched_cpu(rdp->cpu); /* Force CPU into scheduler. */ /* * If more than halfway to RCU CPU stall-warning time, do * a resched_cpu() to try to loosen things up a bit. -- cgit v1.2.3