From: Mike Galbraith <umgwanakikbuti@gmail.com>
To: "Jörn Engel" <joern@purestorage.com>
Cc: Spencer Baugh <sbaugh@catern.com>,
Don Zickus <dzickus@redhat.com>,
Andrew Morton <akpm@linux-foundation.org>,
Ulrich Obergfell <uobergfe@redhat.com>,
Ingo Molnar <mingo@kernel.org>, Andrew Jones <drjones@redhat.com>,
chai wen <chaiw.fnst@cn.fujitsu.com>,
Chris Metcalf <cmetcalf@ezchip.com>,
Stephane Eranian <eranian@google.com>,
open list <linux-kernel@vger.kernel.org>,
Spencer Baugh <Spencer.baugh@purestorage.com>,
Joern Engel <joern@logfs.org>
Subject: Re: [PATCH] soft lockup: kill realtime threads before panic
Date: Wed, 22 Jul 2015 09:35:28 +0200 [thread overview]
Message-ID: <1437550528.3106.107.camel@gmail.com> (raw)
In-Reply-To: <20150722063323.GE23662@Sligo.logfs.org>
On Tue, 2015-07-21 at 23:33 -0700, Jörn Engel wrote:
> One could argue that killing the realtime thread is even better than
> panic, as things can restart with a blank slate even faster. But the
> real benefit is that we get better debug data for the failing component.
> If we had a kernel bug, the backtrace would usually be sufficient to
> point fingers. With a bonkers realtime thread, not so much.
If userspace wants a watchdog, it should train a userspace dog, not turn
the kernel watchdog into a userspace attack dog.
-Mike
next prev parent reply other threads:[~2015-07-22 7:35 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-21 22:07 [PATCH] soft lockup: kill realtime threads before panic Spencer Baugh
2015-07-22 4:36 ` Mike Galbraith
2015-07-22 5:18 ` Jörn Engel
2015-07-22 5:41 ` Mike Galbraith
2015-07-22 6:33 ` Jörn Engel
2015-07-22 7:35 ` Mike Galbraith [this message]
2015-07-22 13:52 ` Don Zickus
2015-07-22 16:35 ` Jörn Engel
2015-07-22 6:59 ` yalin wang
2015-07-22 22:54 ` Andrew Morton
2015-07-22 23:29 ` Jörn Engel
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