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From: Peter Zijlstra <peterz@infradead.org>
To: Bart Van Assche <Bart.VanAssche@wdc.com>
Cc: "tj@kernel.org" <tj@kernel.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"jannh@google.com" <jannh@google.com>,
	"bcrl@kvack.org" <bcrl@kvack.org>,
	"torvalds@linux-foundation.org" <torvalds@linux-foundation.org>,
	"kernel-team@fb.com" <kernel-team@fb.com>,
	"security@kernel.org" <security@kernel.org>,
	"kent.overstreet@gmail.com" <kent.overstreet@gmail.com>,
	"viro@zeniv.linux.org.uk" <viro@zeniv.linux.org.uk>,
	"axboe@kernel.dk" <axboe@kernel.dk>,
	"paulmck@linux.vnet.ibm.com" <paulmck@linux.vnet.ibm.com>
Subject: Re: [PATCH 5/7] block: Remove superflous rcu_read_[un]lock_sched() in blk_queue_enter()
Date: Wed, 14 Mar 2018 21:08:46 +0100	[thread overview]
Message-ID: <20180314200846.GR4064@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <1521057929.3006.31.camel@wdc.com>

On Wed, Mar 14, 2018 at 08:05:30PM +0000, Bart Van Assche wrote:
> Can you clarify this further? From <linux/rcupdate.h>:
> 
> static inline void synchronize_rcu(void)
> {
> 	synchronize_sched();
> }

You'll find that is for !CONFIG_PREEMPT_RCU.

  reply	other threads:[~2018-03-14 20:08 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-03-06 17:26 [PATCHSET] percpu_ref, RCU: Audit RCU usages in percpu_ref users Tejun Heo
2018-03-06 17:33 ` [PATCH 1/7] fs/aio: Add explicit RCU grace period when freeing kioctx Tejun Heo
2018-03-06 17:33   ` [PATCH 2/7] fs/aio: Use RCU accessors for kioctx_table->table[] Tejun Heo
2018-03-06 17:33   ` [PATCH 3/7] RDMAVT: Fix synchronization around percpu_ref Tejun Heo
2018-03-07 15:39     ` Dennis Dalessandro
2018-03-06 17:33   ` [PATCH 4/7] HMM: Remove superflous RCU protection around radix tree lookup Tejun Heo
2018-03-06 17:33     ` Tejun Heo
2018-03-06 17:59     ` Jerome Glisse
2018-03-06 17:59       ` Jerome Glisse
2018-03-06 17:33   ` [PATCH 5/7] block: Remove superflous rcu_read_[un]lock_sched() in blk_queue_enter() Tejun Heo
2018-03-06 17:52     ` Bart Van Assche
2018-03-14 18:46       ` tj
2018-03-14 20:05         ` Bart Van Assche
2018-03-14 20:08           ` Peter Zijlstra [this message]
2018-03-14 20:14             ` Bart Van Assche
2018-03-06 17:33   ` [PATCH 6/7] percpu_ref: Update doc to dissuade users from depending on internal RCU grace periods Tejun Heo
2018-03-06 17:33   ` [PATCH 7/7] RCU, workqueue: Implement rcu_work Tejun Heo
2018-03-06 18:30     ` Linus Torvalds
2018-03-09 15:37       ` Tejun Heo
2018-03-07  2:49     ` Lai Jiangshan
2018-03-07 14:54       ` Paul E. McKenney
2018-03-07 16:23         ` Peter Zijlstra
2018-03-07 17:58           ` Paul E. McKenney
2018-03-08  0:29         ` Lai Jiangshan
2018-03-08 17:28           ` Paul E. McKenney
2018-03-09 16:21           ` Tejun Heo

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