From: Thomas Gleixner <tglx@linutronix.de>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: "Koehrer Mathias (ETAS/ESS2)" <mathias.koehrer@etas.com>,
Jan Kiszka <jan.kiszka@web.de>,
"linux-rt-users@vger.kernel.org" <linux-rt-users@vger.kernel.org>
Subject: Re: AW: VirtualBox 4.2.4 freezes PC using RT_PREEMPT kernel
Date: Fri, 21 Dec 2012 16:05:39 +0100 (CET) [thread overview]
Message-ID: <alpine.LFD.2.02.1212211604060.3148@ionos> (raw)
In-Reply-To: <1356101745.5896.102.camel@gandalf.local.home>
On Fri, 21 Dec 2012, Steven Rostedt wrote:
> On Fri, 2012-12-21 at 08:23 +0000, Koehrer Mathias (ETAS/ESS2) wrote:
> > *** DEADLOCK ***
>
> So this is an obvious bug in virtualbox. No need to send us a config.
> This bug has nothing to do with RT. It's just that RT can expose bugs in
> mainline (or anything added to mainline) much easier.
>
> Funny thing is, this deadlock isn't even possible in RT, so there's
> probably many more bugs in the virtualbox driver.
It's worse on RT, because that's a smp function call interrupt. Which
just cannot work on RT with the lock not being a raw lock.
Thanks,
tglx
next prev parent reply other threads:[~2012-12-21 15:05 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-19 14:44 VirtualBox 4.2.4 freezes PC using RT_PREEMPT kernel Koehrer Mathias (ETAS/ESS2)
2012-12-20 18:20 ` Thomas Gleixner
2012-12-21 8:23 ` AW: " Koehrer Mathias (ETAS/ESS2)
2012-12-21 14:55 ` Steven Rostedt
2012-12-21 15:05 ` Thomas Gleixner [this message]
2012-12-21 15:13 ` Steven Rostedt
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