From: Aaron Tomlin <atomlin@atomlin.com>
To: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Frederic Weisbecker <frederic@kernel.org>,
Christoph Lameter <cl@linux.com>,
tglx@linutronix.de, mingo@kernel.org,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
Phil Auld <pauld@redhat.com>
Subject: Re: [RFC PATCH] tick/sched: Ensure quiet_vmstat() is called when the idle tick was stopped too
Date: Thu, 24 Feb 2022 13:01:48 +0000 [thread overview]
Message-ID: <20220224130148.xfpfmybrtayjncor@ava.usersys.com> (raw)
In-Reply-To: <Yhd6UxWH3FQHg+eF@fuller.cnet>
On Thu 2022-02-24 09:30 -0300, Marcelo Tosatti wrote:
> > > > > 2) What if we are running task A in kernel mode while the tick is stopped
> > > > > (nohz_full). Task A modifies the vmstat and goes to userspace for a long
> > > > > while.
> > > > > Your patch fixes case 1) but not case 2). The problem is that TIMER_DEFERRABLE
> > > > > should really be about dynticks-idle only and not dynticks-full. I've always
> > > > > been afraid about enforcing that rule though because that would break old
> > > > > noise-free setups. But perhaps I should...
>
> Can't grasp the sentence above "The problem is that ...".
> What rule?
Hi Marcelo,
That statement was from Frederic.
Kind regards,
--
Aaron Tomlin
next prev parent reply other threads:[~2022-02-24 13:01 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-03 21:43 [RFC PATCH] tick/sched: Ensure quiet_vmstat() is called when the idle tick was stopped too Aaron Tomlin
2022-02-03 22:22 ` Phil Auld
2022-02-16 14:34 ` Aaron Tomlin
2022-02-16 21:20 ` Phil Auld
2022-02-17 12:57 ` Frederic Weisbecker
2022-02-17 14:45 ` Aaron Tomlin
2022-02-17 12:47 ` Frederic Weisbecker
2022-02-17 14:26 ` Aaron Tomlin
2022-02-17 16:32 ` Frederic Weisbecker
2022-02-18 12:54 ` Aaron Tomlin
2022-02-19 15:46 ` Aaron Tomlin
2022-02-24 12:27 ` Marcelo Tosatti
2022-02-24 12:30 ` Marcelo Tosatti
2022-02-24 13:01 ` Aaron Tomlin [this message]
2022-02-24 12:37 ` Marcelo Tosatti
2022-02-24 13:00 ` Aaron Tomlin
2022-02-24 13:14 ` Marcelo Tosatti
2022-02-24 13:28 ` Aaron Tomlin
2022-02-24 13:40 ` Marcelo Tosatti
2022-02-24 13:44 ` Aaron Tomlin
2022-03-31 14:33 ` Aaron Tomlin
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