From: Peter Zijlstra <peterz@infradead.org>
To: Daniel Bristot de Oliveira <bristot@redhat.com>
Cc: linux-rt-users <linux-rt-users@vger.kernel.org>,
"Sebastian Andrzej Siewior" <bigeasy@linutronix.de>,
"Clark Williams" <williams@redhat.com>,
"Tommaso Cucinotta" <tommaso.cucinotta@sssup.it>,
"Rômulo Silva de Oliveira" <romulo.deoliveira@ufsc.br>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: BUG-RT: scheduling while in atomic in the watchdog's hrtimer
Date: Thu, 21 Mar 2019 22:46:08 +0100 [thread overview]
Message-ID: <20190321214608.GE7905@worktop.programming.kicks-ass.net> (raw)
In-Reply-To: <d2eb047a-6c07-e176-aa2a-68a425efd0ae@redhat.com>
On Thu, Mar 21, 2019 at 10:27:30PM +0100, Daniel Bristot de Oliveira wrote:
> Hi,
>
> In the 4.19/5.0-rt configured !SMP, the following chain of events can
> take place:
>
> ------------------------------ %< -------------------------------------
> smp_apic_timer_interrupt(){
> hrtimer_interrupt() {
> __hrtimer_run_queues() {
> watchdog_timer_fn() {
> stop_one_cpu_nowait() {
> #ifdef !CONFIG_SMP
ARGGHH..
prev parent reply other threads:[~2019-03-21 21:46 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-21 21:27 BUG-RT: scheduling while in atomic in the watchdog's hrtimer Daniel Bristot de Oliveira
2019-03-21 21:46 ` Peter Zijlstra [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20190321214608.GE7905@worktop.programming.kicks-ass.net \
--to=peterz@infradead.org \
--cc=bigeasy@linutronix.de \
--cc=bristot@redhat.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-rt-users@vger.kernel.org \
--cc=romulo.deoliveira@ufsc.br \
--cc=tommaso.cucinotta@sssup.it \
--cc=williams@redhat.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).