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  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:   Thu, 7 Oct 2021 10:49:20 +0200
From:   Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:     "Paul E. McKenney" <paulmck@...nel.org>
Cc:     Frederic Weisbecker <frederic@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Uladzislau Rezki <urezki@...il.com>,
        Valentin Schneider <valentin.schneider@....com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Boqun Feng <boqun.feng@...il.com>,
        Neeraj Upadhyay <neeraju@...eaurora.org>,
        Josh Triplett <josh@...htriplett.org>,
        Joel Fernandes <joel@...lfernandes.org>, rcu@...r.kernel.org
Subject: Re: [PATCH 00/11] rcu: Make rcu_core() safe in PREEMPT_RT with NOCB
 + a few other fixes

On 2021-10-06 08:13:39 [-0700], Paul E. McKenney wrote:
> On Thu, Sep 30, 2021 at 12:10:01AM +0200, Frederic Weisbecker wrote:
> > PREEMPT_RT has made rcu_core() preemptible, making it unsafe against
> > concurrent NOCB (de-)offloading.
> > 
> > Thomas suggested to drop the local_lock() based solution and simply
> > check the offloaded state while context looks safe but that's not
> > enough. Here is a bit of rework.
> > 
> > git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks.git
> > 	rcu/rt
> > 
> > HEAD: aac1c58961446c731f2e989bd822ca1fd2659bad
> 
> Many of these look quite good, but any chance of getting an official
> Tested-by from someone in the -rt community?

I looked over the series, bootet the series and run a quick rcutorture
and didn't notice anything.

Tested-by: Sebastian Andrzej Siewior <bigeasy@...utronix.de>

> 							Thanx, Paul

Sebastian

Powered by blists - more mailing lists