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From: Ingo Molnar <mingo@elte.hu>
To: Bastien ROUCARIES <roucaries.bastien@gmail.com>,
	Avi Kivity <avi@redhat.com>, Sheng Yang <sheng@linux.intel.com>,
	KVM devel mailing list <kvm@vger.kernel.org>
Cc: LKML <linux-kernel@vger.kernel.org>,
	Matthew Garrett <mjg59@srcf.ucam.org>,
	"Rafael J. Wysocki" <rjw@sisk.pl>,
	Thomas Gleixner <tglx@linutronix.de>,
	x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>
Subject: [VT-d reboot problems] Re: [PATCH] x86 / reboot: Blacklist Dell OptiPlex 990 known to require PCI reboot
Date: Tue, 31 Jan 2012 13:15:13 +0100	[thread overview]
Message-ID: <20120131121513.GE32010@elte.hu> (raw)
In-Reply-To: <CAE2SPAbHxjQm3-z+LRXYBJAVnrwjMn=u=9RFLmZ6hkc8XtNy+w@mail.gmail.com>


(added KVM folks to the Cc:)

* Bastien ROUCARIES <roucaries.bastien@gmail.com> wrote:

> Ping^2
> 
> Bastien
> On Mon, Jan 23, 2012 at 11:28 AM, Bastien ROUCARIES
> <roucaries.bastien@gmail.com> wrote:
> > On Mon, Jan 16, 2012 at 8:21 PM, H. Peter Anvin <hpa@zytor.com> wrote:
> >> On 01/16/2012 03:27 AM, Bastien ROUCARIES wrote:
> >>>>
> >>>> Does it work if you disable VT-d in the firmware? If so, then adding it
> >>>> to the reboot method blacklist is the wrong fix - we need to figure out
> >>>> why VT-d interferes with Dell's reboot code.
> >>>
> >>> Yes it work
> >>>
> >>
> >> This is particularly so since we are very close to having a full Dell
> >> model catalogue in the kernel...
> >
> > Ping ? Do you need some dump ? testing ?

So disabling VT-d in the BIOS fixes the reboot problem and 
Matthew Garrett suggests we should figure out why and how VT-d 
on this Dell box interferes with the reboot method.

Thanks,

	Ingo

       reply	other threads:[~2012-01-31 12:15 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <201111160019.51303.rjw@sisk.pl>
     [not found] ` <201201091700.09318.roucaries.bastien@gmail.com>
     [not found]   ` <20120116004110.GA21240@srcf.ucam.org>
     [not found]     ` <CAE2SPAZH9vQ=7mTxaCGY6DHdf5Yvv-0SWCwUobUY3tTD5caLow@mail.gmail.com>
     [not found]       ` <4F1478B0.6080200@zytor.com>
     [not found]         ` <CAE2SPAak9xnN8Tbjru3eLN79_JGTGaPWi7w+t=7peN-Nd9f+Bw@mail.gmail.com>
     [not found]           ` <CAE2SPAbHxjQm3-z+LRXYBJAVnrwjMn=u=9RFLmZ6hkc8XtNy+w@mail.gmail.com>
2012-01-31 12:15             ` Ingo Molnar [this message]
2012-02-14 18:17               ` [VT-d reboot problems] Re: [PATCH] x86 / reboot: Blacklist Dell OptiPlex 990 known to require PCI reboot Bastien ROUCARIES

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