From: Xiao Guangrong <guangrong.xiao@linux.intel.com>
To: Markus Trippelsdorf <markus@trippelsdorf.de>
Cc: Ingo Molnar <mingo@kernel.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
linux-kernel@vger.kernel.org,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
Thomas Gleixner <tglx@linutronix.de>,
Andrew Morton <akpm@linux-foundation.org>,
Mike Galbraith <efault@gmx.de>, Joerg Roedel <jroedel@suse.de>,
Paolo Bonzini <pbonzini@redhat.com>,
kvm@vger.kernel.org
Subject: Re: commit 3c2e7f7de3 (KVM use NPT page attributes) causes boot failures
Date: Wed, 2 Sep 2015 06:31:25 +0800 [thread overview]
Message-ID: <55E6273D.6080701@linux.intel.com> (raw)
In-Reply-To: <20150901135636.GA423@x4>
On 09/01/2015 09:56 PM, Markus Trippelsdorf wrote:
> On 2015.09.01 at 21:00 +0800, Xiao Guangrong wrote:
>>
>> Did it trigger the BUG()/BUG_ON() in mtrr2protval()/fallback_mtrr_type()?
>> If yes, could you please print the actual value out?
>
> It is the BUG() in fallback_mtrr_type(). I changed it to a printk and
> it prints 1 for the value of mtrr.
>
> MTRR_TYPE_WRCOMB 1
>
Then I suspect pat is not enabled in your box, could you please check
CONFIG_X86_PAT is selected in your .config file, pat is shown in
/proc/cpuid, "nopat" kernel parameter is used, and dmesg | grep PAT.
I will post a fix if the suspect is right.
next prev parent reply other threads:[~2015-09-01 22:37 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-08-31 17:24 [GIT PULL] scheduler changes for v4.3 Ingo Molnar
2015-09-01 7:08 ` Markus Trippelsdorf
2015-09-01 7:27 ` Ingo Molnar
2015-09-01 7:44 ` Markus Trippelsdorf
2015-09-01 8:38 ` Ingo Molnar
2015-09-01 8:44 ` Markus Trippelsdorf
2015-09-01 8:56 ` Ingo Molnar
2015-09-01 10:04 ` commit 3c2e7f7de3 (KVM use NPT page attributes) causes boot failures Markus Trippelsdorf
2015-09-01 13:00 ` Xiao Guangrong
2015-09-01 13:56 ` Markus Trippelsdorf
2015-09-01 22:31 ` Xiao Guangrong [this message]
2015-09-02 3:50 ` Markus Trippelsdorf
2015-09-02 9:17 ` Xiao Guangrong
2015-09-02 9:38 ` Markus Trippelsdorf
2015-09-02 10:27 ` Xiao Guangrong
2015-09-02 10:54 ` Markus Trippelsdorf
2015-09-02 10:57 ` Xiao Guangrong
2015-09-01 8:50 ` [GIT PULL] scheduler changes for v4.3 Markus Trippelsdorf
2015-09-01 8:18 ` Markus Trippelsdorf
2015-09-01 8:39 ` Markus Trippelsdorf
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