From: Borislav Petkov <bp@alien8.de>
To: "Luck, Tony" <tony.luck@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>,
"mingo@kernel.org" <mingo@kernel.org>,
"hpa@zytor.com" <hpa@zytor.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"torvalds@linux-foundation.org" <torvalds@linux-foundation.org>,
"atodorov@redhat.com" <atodorov@redhat.com>,
"gong.chen@linux.intel.com" <gong.chen@linux.intel.com>,
"jwboyer@fedoraproject.org" <jwboyer@fedoraproject.org>,
"qmewlo@gmail.com" <qmewlo@gmail.com>,
"tglx@linutronix.de" <tglx@linutronix.de>,
"linux-tip-commits@vger.kernel.org"
<linux-tip-commits@vger.kernel.org>
Subject: Re: [tip:x86/urgent] x86/mce: Fix CMCI preemption bugs
Date: Thu, 17 Apr 2014 17:26:11 +0200 [thread overview]
Message-ID: <20140417152611.GD4321@pd.tnic> (raw)
In-Reply-To: <3908561D78D1C84285E8C5FCA982C28F31E2A1D3@ORSMSX106.amr.corp.intel.com>
On Thu, Apr 17, 2014 at 02:03:34PM +0000, Luck, Tony wrote:
> > Hohum, __raw_spin_lock_irqsave does preempt_disable(). And
> > machine_check_poll should be running in irq context so why would the
> > original issue happen?
> >
> >> kernel: [ 7.341085] BUG: using __this_cpu_write() in preemptible [00000000] code: modprobe/546
> >
> > Unfortunately, I have only one line in a mail CCed to me.
> >
> > Color me confused.
>
> Is this just the missing put_cpu() that Chen Gong already sent a patch for?
I'm not sure. There's some bug report floating around which contains the
"BUG" line above but I can't seem to find/get it.
I'll boot latest Linus tree on my SNB machine to check whether it
triggers here. Ingo says CONFIG_DEBUG_PREEMPT=y is causing it but this
is all hearsay stuff from where I'm standing...
--
Regards/Gruss,
Boris.
Sent from a fat crate under my desk. Formatting is fine.
--
next prev parent reply other threads:[~2014-04-17 15:26 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-04-17 9:57 [tip:x86/urgent] x86/mce: Fix CMCI preemption bugs tip-bot for Ingo Molnar
2014-04-17 10:09 ` Peter Zijlstra
2014-04-17 10:24 ` Borislav Petkov
2014-04-17 14:03 ` Luck, Tony
2014-04-17 15:26 ` Borislav Petkov [this message]
2014-04-17 16:54 ` Josh Boyer
2014-04-17 19:23 ` Borislav Petkov
2014-04-17 19:25 ` Linus Torvalds
2014-04-17 19:42 ` Borislav Petkov
2014-04-17 20:58 ` Borislav Petkov
[not found] ` <CAK7FoDt6tnknX7cioe7=2svVksyAyLUtoZX_oprzJNxoHZEpdw@mail.gmail.com>
2014-04-17 21:30 ` Borislav Petkov
2014-04-17 22:20 ` Borislav Petkov
2014-04-18 8:07 ` Ingo Molnar
2014-04-18 9:22 ` Borislav Petkov
2014-04-25 8:47 ` Chen, Gong
2014-04-25 13:15 ` Ingo Molnar
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