linux-kernel - Re: [PATCH tip/core/rcu 03/15] rcu: Drive TASKS

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Tue, 25 Jul 2017 14:14:05 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Cc:     linux-kernel@...r.kernel.org, mingo@...nel.org,
        jiangshanlai@...il.com, dipankar@...ibm.com,
        akpm@...ux-foundation.org, mathieu.desnoyers@...icios.com,
        josh@...htriplett.org, tglx@...utronix.de, peterz@...radead.org,
        dhowells@...hat.com, edumazet@...gle.com, fweisbec@...il.com,
        oleg@...hat.com
Subject: Re: [PATCH tip/core/rcu 03/15] rcu: Drive TASKS_RCU directly off of
 PREEMPT

On Mon, 24 Jul 2017 14:44:32 -0700
"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com> wrote:

> The actual use of TASKS_RCU is only when PREEMPT, otherwise RCU-sched
> is used instead.  This commit therefore makes synchronize_rcu_tasks()
> and call_rcu_tasks() available always, but mapped to synchronize_sched()
> and call_rcu_sched(), respectively, when !PREEMPT.  This approach also
> allows some #ifdefs to be removed from rcutorture.
> 

Hmm, I'll need to update ftrace. I believe I call synchronize_sched()
twice with !PREEMPT then.

-- Steve