linux-kernel - Re: [PATCH] tracing/osnoise: Force quiescent states while tracing

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Message-ID: <34833549a995fa3325f4ceb9b42cd01de0921c14.camel@redhat.com>
Date:   Fri, 04 Mar 2022 16:55:06 +0100
From:   Nicolas Saenz Julienne <nsaenzju@...hat.com>
To:     Daniel Bristot de Oliveira <bristot@...nel.org>
Cc:     mingo@...hat.com, linux-kernel@...r.kernel.org,
        mtosatti@...hat.com, paulmck@...nel.org, rostedt@...dmis.org,
        Juri Lelli <juri.lelli@...hat.com>
Subject: Re: [PATCH] tracing/osnoise: Force quiescent states while tracing

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.

-- 
Nicolás Sáenz