From: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
To: "Darrick J. Wong" <darrick.wong@oracle.com>,
Michael Ellerman <mpe@ellerman.id.au>
Cc: linuxppc-dev@ozlabs.org
Subject: Re: kernel bug in "Drop WIMG in favour of new constants"?
Date: Thu, 16 Jun 2016 16:16:00 +0530 [thread overview]
Message-ID: <87ziql8l93.fsf@skywalker.in.ibm.com> (raw)
In-Reply-To: <8737oda1lt.fsf@skywalker.in.ibm.com>
"Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com> writes:
> "Darrick J. Wong" <darrick.wong@oracle.com> writes:
>
>> On Thu, Jun 16, 2016 at 03:23:47PM +1000, Michael Ellerman wrote:
>>> On Wed, 2016-06-15 at 21:33 -0700, Darrick J. Wong wrote:
>>>
>>> > Hi Aneesh,
>>> >
>>> > I noticed when trying out 4.7-rc3 on qemu-2.5 that the kernel no longer
>>> > boots. 4.6 booted just fine, so I bisected the kernel to the commit
>>> > 30bda41aba4efb2370c97e2cbe7385de93ccc372, which is "powerpc/mm: Drop WIMG in
>>> > favour of new constants". The changelog suggests that the KVM changes need
>>> > closer review, and here's an actual crash:
>>> >
>>> > (I can send libvirt's machine xml, .config, and full dmesg if that helps.)
>>>
>>> Yes please.
>>>
>>> I'm successfully booting 4.7-rc's on qemu (2.5.0 (Debian 1:2.5+dfsg-5ubuntu10.1)).
>>
>> Ok, see attached. I also sent along the dpkg --status output for qemu
>> and qemu-slof; looks like we're running the same Ubuntu packages...
>>
>> ...my host kernel is 4.6.0 on x64.
>
> So this is Qemu TCG mode right ? I will try some test and update later.
>
I am able to reproduce this with
qemu-system-ppc64 -kernel vmlinux -machine
type=pseries,usb=off -smp 1 -m 1G -vga none -nographic -device
usb-ehci -device usb-kbd -device usb-mouse
Looks like enabling usb device is the issue.
-aneesh
next prev parent reply other threads:[~2016-06-16 10:46 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-16 4:33 kernel bug in "Drop WIMG in favour of new constants"? Darrick J. Wong
2016-06-16 5:23 ` Michael Ellerman
2016-06-16 5:57 ` Darrick J. Wong
2016-06-16 10:07 ` Aneesh Kumar K.V
2016-06-16 10:46 ` Aneesh Kumar K.V [this message]
2016-06-16 10:52 ` Aneesh Kumar K.V
2016-06-16 12:05 ` Benjamin Herrenschmidt
2016-06-16 14:45 ` Aneesh Kumar K.V
2016-06-16 14:31 ` Aneesh Kumar K.V
2016-06-16 22:30 ` Benjamin Herrenschmidt
2016-06-17 1:49 ` Darrick J. Wong
2016-06-16 16:23 ` Darrick J. Wong
2016-06-16 5:28 ` Balbir Singh
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