linux-kernel - Re: nohz fail (was: perf related boot hang.)

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20140904201752.GA3116@lerouge>
Date:	Thu, 4 Sep 2014 22:17:55 +0200
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Catalin Iacob <iacobcatalin@...il.com>
Cc:	Dave Jones <davej@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: nohz fail (was: perf related boot hang.)

On Thu, Sep 04, 2014 at 10:07:37PM +0200, Catalin Iacob wrote:
> On Tue, Sep 2, 2014 at 8:23 PM, Catalin Iacob <iacobcatalin@...il.com> wrote:
> > On Mon, Sep 1, 2014 at 10:14 PM, Frederic Weisbecker <fweisbec@...il.com> wrote:
> >> I'll send "nohz: Restore NMI safe local irq work for local nohz kick"
> >> as a fix for 3.17 and the rest will have to wait for 3.18 as it's a complicated
> >> fix for a long standing bug.
> >
> > I've been running with the full series since you sent it and haven't
> > experienced the bug since. I'll try to test with just the 3.17 patch
> > to also check that it's enough on its own.
> 
> I tested with just "nohz: Restore NMI safe local irq work for local
> nohz kick" on top of 7505ceaf8635 (which is 3.17-rc3 plus the merge of
> 1 commit) and unfortunately it doesn't fix the issue. I got the same
> panic after some minutes of building Firefox.

Yeah, that's expected. You need to apply the nine patches on top of -rc1:

git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks.git
        nohz/fixes

"nohz: Restore NMI safe local irq work for local nohz kick" only fixes
part of the issue.

Thanks.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/