From: Peter Zijlstra <peterz@infradead.org>
To: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Lai Jiangshan <jiangshanlai+lkml@gmail.com>,
Tejun Heo <tj@kernel.org>,
torvalds@linux-foundation.org, jannh@google.com, bcrl@kvack.org,
viro@zeniv.linux.org.uk, kent.overstreet@gmail.com,
security@kernel.org, LKML <linux-kernel@vger.kernel.org>,
kernel-team@fb.com
Subject: Re: [PATCH 7/7] RCU, workqueue: Implement rcu_work
Date: Wed, 7 Mar 2018 17:23:17 +0100 [thread overview]
Message-ID: <20180307162317.GO25181@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <20180307145408.GC3918@linux.vnet.ibm.com>
On Wed, Mar 07, 2018 at 06:54:08AM -0800, Paul E. McKenney wrote:
> One downside of allowing RCU callback functions to sleep is that
> one poorly written callback can block a bunch of other ones.
Not to mention that we really want the RCU callbacks to be simple and
short. Needing fancy things in the callback really should be the
exception not the rule.
next prev parent reply other threads:[~2018-03-07 16:23 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
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 [this message]
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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