Commit b201fa67 authored by Paul E. McKenney's avatar Paul E. McKenney

rcu: Remove short-term CPU kicking

Commit 4914950a ("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 b7e7ade3 ("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: default avatarByungchul Park <byungchul.park@lge.com>
Signed-off-by: default avatarPaul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: default avatarJosh Triplett <josh@joshtriplett.org>
parent 28053bc7
...@@ -1220,11 +1220,6 @@ static int rcu_implicit_dynticks_qs(struct rcu_data *rdp, ...@@ -1220,11 +1220,6 @@ static int rcu_implicit_dynticks_qs(struct rcu_data *rdp,
rdp->rsp->jiffies_resched += 5; /* Re-enable beating. */ 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 * If more than halfway to RCU CPU stall-warning time, do
* a resched_cpu() to try to loosen things up a bit. * a resched_cpu() to try to loosen things up a bit.
......
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