The patch titled
Subject: sched: introduce this_rq_lock_irq()
has been added to the -mm tree. Its filename is
sched-introduce-this_rq_lock_irq.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/sched-introduce-this_rq_lock_irq.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/sched-introduce-this_rq_lock_irq.patch
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------------------------------------------------------
From: Johannes Weiner <hannes@xxxxxxxxxxx>
Subject: sched: introduce this_rq_lock_irq()
do_sched_yield() disables IRQs, looks up this_rq() and locks it. The next
patch is adding another site with the same pattern, so provide a
convenience function for it.
Link: http://lkml.kernel.org/r/20180828172258.3185-8-hannes@xxxxxxxxxxx
Signed-off-by: Johannes Weiner <hannes@xxxxxxxxxxx>
Tested-by: Suren Baghdasaryan <surenb@xxxxxxxxxx>
Tested-by: Daniel Drake <drake@xxxxxxxxxxxx>
Cc: Christopher Lameter <cl@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Johannes Weiner <jweiner@xxxxxx>
Cc: Mike Galbraith <efault@xxxxxx>
Cc: Peter Enderborg <peter.enderborg@xxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Cc: Shakeel Butt <shakeelb@xxxxxxxxxx>
Cc: Tejun Heo <tj@xxxxxxxxxx>
Cc: Vinayak Menon <vinmenon@xxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/sched/core.c | 4 +---
kernel/sched/sched.h | 12 ++++++++++++
2 files changed, 13 insertions(+), 3 deletions(-)
--- a/kernel/sched/core.c~sched-introduce-this_rq_lock_irq
+++ a/kernel/sched/core.c
@@ -4932,9 +4932,7 @@ static void do_sched_yield(void)
struct rq_flags rf;
struct rq *rq;
- local_irq_disable();
- rq = this_rq();
- rq_lock(rq, &rf);
+ rq = this_rq_lock_irq(&rf);
schedstat_inc(rq->yld_count);
current->sched_class->yield_task(rq);
--- a/kernel/sched/sched.h~sched-introduce-this_rq_lock_irq
+++ a/kernel/sched/sched.h
@@ -1150,6 +1150,18 @@ rq_unlock(struct rq *rq, struct rq_flags
raw_spin_unlock(&rq->lock);
}
+static inline struct rq *
+this_rq_lock_irq(struct rq_flags *rf)
+ __acquires(rq->lock)
+{
+ struct rq *rq;
+
+ local_irq_disable();
+ rq = this_rq();
+ rq_lock(rq, rf);
+ return rq;
+}
+
#ifdef CONFIG_NUMA
enum numa_topology_type {
NUMA_DIRECT,
_
Patches currently in -mm which might be from hannes@xxxxxxxxxxx are
mm-workingset-tell-cache-transitions-from-workingset-thrashing.patch
delayacct-track-delays-from-thrashing-cache-pages.patch
sched-loadavg-consolidate-load_int-load_frac-calc_load.patch
sched-loadavg-make-calc_load_n-public.patch
sched-schedh-make-rq-locking-and-clock-functions-available-in-statsh.patch
sched-introduce-this_rq_lock_irq.patch
psi-pressure-stall-information-for-cpu-memory-and-io.patch
psi-pressure-stall-information-for-cpu-memory-and-io-fix.patch
psi-pressure-stall-information-for-cpu-memory-and-io-fix-2.patch
psi-pressure-stall-information-for-cpu-memory-and-io-fix-3.patch
psi-cgroup-support.patch
