From: Peter Zijlstra <peterz@infradead.org>
To: Waiman Long <longman@redhat.com>
Cc: mingo@kernel.org, will@kernel.org, oleg@redhat.com,
tglx@linutronix.de, linux-kernel@vger.kernel.org,
bigeasy@linutronix.de, juri.lelli@redhat.com,
williams@redhat.com, bristot@redhat.com, dave@stgolabs.net,
jack@suse.com
Subject: Re: [PATCH 5/5] locking/percpu-rwsem: Remove the embedded rwsem
Date: Tue, 17 Dec 2019 11:28:24 +0100 [thread overview]
Message-ID: <20191217102824.GB2844@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <7b412d15-b796-3b8d-0e98-22362377093f@redhat.com>
On Mon, Nov 18, 2019 at 04:52:23PM -0500, Waiman Long wrote:
> On 11/13/19 5:21 AM, Peter Zijlstra wrote:
> > @@ -130,20 +131,12 @@ static inline void percpu_rwsem_release(
> > bool read, unsigned long ip)
> > {
> > lock_release(&sem->dep_map, ip);
> > -#ifdef CONFIG_RWSEM_SPIN_ON_OWNER
> > - if (!read)
> > - atomic_long_set(&sem->rw_sem.owner, RWSEM_OWNER_UNKNOWN);
> > -#endif
> > }
> >
>
> This is the only place that set RWSEM_OWNER_UNKNOWN. So you may as well
> remove all references to it:
Done, thanks!
next prev parent reply other threads:[~2019-12-17 10:28 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-13 10:21 [PATCH 0/5] locking: Percpu-rwsem rewrite Peter Zijlstra
2019-11-13 10:21 ` [PATCH 1/5] locking/percpu-rwsem, lockdep: Make percpu-rwsem use its own lockdep_map Peter Zijlstra
2019-11-15 20:39 ` Davidlohr Bueso
2020-01-08 1:33 ` [PATCH] locking/percpu-rwsem: Add might_sleep() for writer locking Davidlohr Bueso
2020-01-08 1:33 ` Davidlohr Bueso
2020-02-11 12:48 ` [tip: locking/core] " tip-bot2 for Davidlohr Bueso
2019-11-13 10:21 ` [PATCH 2/5] locking/percpu-rwsem: Convert to bool Peter Zijlstra
2019-11-13 10:21 ` [PATCH 3/5] locking/percpu-rwsem: Move __this_cpu_inc() into the slowpath Peter Zijlstra
2019-11-13 10:21 ` [PATCH 4/5] locking/percpu-rwsem: Extract __percpu_down_read_trylock() Peter Zijlstra
2019-11-18 16:28 ` Oleg Nesterov
2019-11-13 10:21 ` [PATCH 5/5] locking/percpu-rwsem: Remove the embedded rwsem Peter Zijlstra
2019-11-18 19:53 ` Davidlohr Bueso
2019-11-18 23:19 ` Davidlohr Bueso
2019-12-17 10:45 ` Peter Zijlstra
2019-12-17 10:35 ` Peter Zijlstra
2019-11-18 21:52 ` Waiman Long
2019-12-17 10:28 ` Peter Zijlstra [this message]
2019-11-19 13:50 ` Waiman Long
2019-11-19 15:58 ` Oleg Nesterov
2019-11-19 16:28 ` Waiman Long
2019-12-17 10:26 ` Peter Zijlstra
2019-12-17 10:28 ` Peter Zijlstra
2019-11-15 17:14 ` [PATCH 0/5] locking: Percpu-rwsem rewrite Juri Lelli
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