Message ID | 20180801151958.32590-8-hannes@cmpxchg.org (mailing list archive) |
---|---|
State | New, archived |
Headers | show
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[216.49.36.201]) by smtp.gmail.com with ESMTPSA id k38-v6sm13787746qtc.45.2018.08.01.08.17.32 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Wed, 01 Aug 2018 08:17:33 -0700 (PDT) From: Johannes Weiner <hannes@cmpxchg.org> To: Ingo Molnar <mingo@redhat.com>, Peter Zijlstra <peterz@infradead.org>, Andrew Morton <akpm@linux-foundation.org>, Linus Torvalds <torvalds@linux-foundation.org> Cc: Tejun Heo <tj@kernel.org>, Suren Baghdasaryan <surenb@google.com>, Daniel Drake <drake@endlessm.com>, Vinayak Menon <vinmenon@codeaurora.org>, Christopher Lameter <cl@linux.com>, Mike Galbraith <efault@gmx.de>, Shakeel Butt <shakeelb@google.com>, Peter Enderborg <peter.enderborg@sony.com>, linux-mm@kvack.org, cgroups@vger.kernel.org, linux-kernel@vger.kernel.org, kernel-team@fb.com Subject: [PATCH 7/9] sched: introduce this_rq_lock_irq() Date: Wed, 1 Aug 2018 11:19:56 -0400 Message-Id: <20180801151958.32590-8-hannes@cmpxchg.org> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20180801151958.32590-1-hannes@cmpxchg.org> References: <20180801151958.32590-1-hannes@cmpxchg.org> X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: <linux-mm.kvack.org> X-Virus-Scanned: ClamAV using ClamSMTP |
Series |
psi: pressure stall information for CPU, memory, and IO v3
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diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 211890edf37e..9586a8141f16 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -4960,9 +4960,7 @@ 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); diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h index b8f038497240..bc798c7cb4d4 100644 --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h @@ -1119,6 +1119,18 @@ rq_unlock(struct rq *rq, struct rq_flags *rf) 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,
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. Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> --- kernel/sched/core.c | 4 +--- kernel/sched/sched.h | 12 ++++++++++++ 2 files changed, 13 insertions(+), 3 deletions(-)