Received-SPF: softfail (google.com: domain of transitioning linux-kernel-owner@vger.kernel.org does not designate 23.128.96.19 as permitted sender) client-ip=23.128.96.19;
Date:   Fri, 4 Mar 2022 08:26:44 -0800
From:   "Paul E. McKenney" <paulmck@kernel.org>
To:     Nicolas Saenz Julienne <nsaenzju@redhat.com>
Cc:     Daniel Bristot de Oliveira <bristot@kernel.org>, mingo@redhat.com,
        linux-kernel@vger.kernel.org, mtosatti@redhat.com,
        rostedt@goodmis.org, Juri Lelli <juri.lelli@redhat.com>
Subject: Re: [PATCH] tracing/osnoise: Force quiescent states while tracing
Message-ID: <20220304162644.GO4285@paulmck-ThinkPad-P17-Gen-1>
Reply-To: paulmck@kernel.org
References: <20220228141423.259691-1-nsaenzju@redhat.com>
 <78d798aa-388c-70bc-4227-985ba76c1d7e@kernel.org>
 <b5e1f0d14a48c0815863af623cedbdc8c1bc255f.camel@redhat.com>
 <abb789c3-0d1a-28e9-3b8d-e4a68e3f57f5@kernel.org>
 <2b47679c6248a0d113b556ed6118e8ed72c74b29.camel@redhat.com>
 <bc048c18-0ba7-1cb9-90a0-0bc049997c23@kernel.org>
 <34833549a995fa3325f4ceb9b42cd01de0921c14.camel@redhat.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <34833549a995fa3325f4ceb9b42cd01de0921c14.camel@redhat.com>
Precedence: bulk

On Fri, Mar 04, 2022 at 04:55:06PM +0100, Nicolas Saenz Julienne wrote:
> On Fri, 2022-03-04 at 16:37 +0100, Daniel Bristot de Oliveira wrote:
> > On 3/4/22 16:28, Nicolas Saenz Julienne wrote:
> > > Some comments:
> > >  - You're not exiting/entering EQS on IRQ/NMI entry/exit. See
> > >    irqentry_{enter,exit}() and irqentry_nmi_{enter,exit}().
> > 
> > hummm, right!
> > 
> > >  - See this series[1], if we ever pursue this approach, it's important we got
> > >    through context tracking, instead of poking at RCU directly.
> > 
> > I had a test patch with context_tracking as well... entering and leaving using
> > it. Lemme find it.... but it basically works in the same way as for RCU (or
> > pretend to work).
> 
> Yes, agree, it's fundamentally the same.

And there is work in flight to make it even more the same.  ;-)

https://lore.kernel.org/all/20220302154810.42308-1-frederic@kernel.org/

							Thanx, Paul