From: Pavel Begunkov <asml.silence@gmail.com>
To: Jens Axboe <axboe@kernel.dk>,
io-uring@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 4/5] tasks: add put_task_struct_many()
Date: Tue, 14 Jul 2020 02:41:55 +0300 [thread overview]
Message-ID: <97d4ccff189d1df7e0a7656af40ced2642caef99.1594683622.git.asml.silence@gmail.com> (raw)
In-Reply-To: <cover.1594683622.git.asml.silence@gmail.com>
put_task_struct_many() is as put_task_struct() but puts several
references at once. Useful to batching it.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
---
include/linux/sched/task.h | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/include/linux/sched/task.h b/include/linux/sched/task.h
index 38359071236a..1301077f9c24 100644
--- a/include/linux/sched/task.h
+++ b/include/linux/sched/task.h
@@ -126,6 +126,12 @@ static inline void put_task_struct(struct task_struct *t)
__put_task_struct(t);
}
+static inline void put_task_struct_many(struct task_struct *t, int nr)
+{
+ if (refcount_sub_and_test(nr, &t->usage))
+ __put_task_struct(t);
+}
+
void put_task_struct_rcu_user(struct task_struct *task);
#ifdef CONFIG_ARCH_WANTS_DYNAMIC_TASK_STRUCT
--
2.24.0
next prev parent reply other threads:[~2020-07-13 23:44 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-13 23:41 [PATCH 0/5] batch completion + freeing improvements Pavel Begunkov
2020-07-13 23:41 ` [PATCH 1/5] io_uring: move io_req_complete() definition Pavel Begunkov
2020-07-13 23:41 ` [PATCH 2/5] io_uring: replace list with array for compl batch Pavel Begunkov
2020-07-13 23:41 ` [PATCH 3/5] io_uring: batch free in batched completion Pavel Begunkov
2020-07-13 23:41 ` Pavel Begunkov [this message]
2020-07-13 23:41 ` [PATCH 5/5] io_uring: batch put_task_struct() Pavel Begunkov
2020-07-14 1:08 ` [PATCH 0/5] batch completion + freeing improvements Jens Axboe
2020-07-14 7:15 ` Pavel Begunkov
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