From: Peter Zijlstra <peterz@infradead.org>
To: Frederic Weisbecker <frederic@kernel.org>
Cc: Qian Cai <cai@lca.pw>, "Paul E. McKenney" <paulmck@kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Michael Ellerman <mpe@ellerman.id.au>,
linuxppc-dev <linuxppc-dev@lists.ozlabs.org>,
Borislav Petkov <bp@alien8.de>
Subject: Re: Endless soft-lockups for compiling workload since next-20200519
Date: Thu, 21 May 2020 12:10:47 +0200 [thread overview]
Message-ID: <20200521101047.GH325280@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <20200521004035.GA15455@lenoir>
On Thu, May 21, 2020 at 02:40:36AM +0200, Frederic Weisbecker wrote:
> atomic_fetch_or(...., nohz_flags(0))
> softirq() { #VMEXIT or anything that could stop a CPU for a while
> run_rebalance_domain() {
> nohz_idle_balance() {
> atomic_andnot(NOHZ_KICK_MASK, nohz_flag(0))
I'm an idiot and didn't have enough wake-up-juice; I missed that andnot
clearing the flag again.
Yes, fun fun fun..
prev parent reply other threads:[~2020-05-21 10:11 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-20 3:58 Endless soft-lockups for compiling workload since next-20200519 Qian Cai
2020-05-20 12:50 ` Peter Zijlstra
2020-05-20 14:06 ` Qian Cai
2020-05-21 0:40 ` Frederic Weisbecker
2020-05-21 9:39 ` Peter Zijlstra
2020-05-21 10:49 ` Peter Zijlstra
2020-05-21 11:00 ` Peter Zijlstra
2020-05-21 12:41 ` Frederic Weisbecker
2020-05-25 13:21 ` Peter Zijlstra
2020-05-25 14:05 ` Frederic Weisbecker
2020-05-25 14:38 ` Peter Zijlstra
2020-05-25 14:17 ` Peter Zijlstra
2020-05-22 2:00 ` Qian Cai
2020-05-21 10:10 ` 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=20200521101047.GH325280@hirez.programming.kicks-ass.net \
--to=peterz@infradead.org \
--cc=bp@alien8.de \
--cc=cai@lca.pw \
--cc=frederic@kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linuxppc-dev@lists.ozlabs.org \
--cc=mpe@ellerman.id.au \
--cc=paulmck@kernel.org \
--cc=tglx@linutronix.de \
/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