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Re: [Qemu-ppc] [Qemu-devel] [PATCH 00/28] target-ppc: Altivec 2.07
From: |
Richard W.M. Jones |
Subject: |
Re: [Qemu-ppc] [Qemu-devel] [PATCH 00/28] target-ppc: Altivec 2.07 |
Date: |
Thu, 20 Feb 2014 12:47:31 +0000 |
User-agent: |
Mutt/1.5.20 (2009-12-10) |
On Thu, Feb 20, 2014 at 01:36:57PM +0100, Alexander Graf wrote:
>
> On 20.02.2014, at 13:34, Richard W.M. Jones <address@hidden> wrote:
>
> > On Thu, Feb 20, 2014 at 10:23:42AM +0000, Richard W.M. Jones wrote:
> >> I am now running a full libguestfs test which will take several hours,
> >> but it looks as if -- even if this test fails -- it won't be because
> >> of lack of emulation / missing instructions in qemu.
> >
> > The tests ran. I hit two bugs, but neither seems to be related to
> > qemu emulation. Please push these patches into upstream qemu :-)
>
> They will get into 2.0, no worries :).
>
> > One bug is in btrfs and is related to page size being different (and
> > much larger) on ppc64.
>
> I remember bugs (oopses) with btrfs when you use a 4k page size created fs
> and use it on a 64k page size kernel and vice versa. They still haven't fixed
> that?
The failure from the log is:
wipefs -a --force /dev/sda1
mkfs.btrfs --alloc-start 0 --byte-count 268435456 --data single --leafsize
4096 --label test --metadata single --nodesize 4096 --sectorsize 512 /dev/sda1
Illegal leafsize (or nodesize) 4096 (smaller than 65536)
I have not analysed this beyond simply looking at the command line
now, but it seems that this is NOT a bug in btrfs, but a bug in the
test suite, selecting a too small --leafsize parameter. Or perhaps a
limitation in btrfs. Anyway, doesn't look serious.
> > The second bug is kind of interesting. If you add ~ 256 disks (using
> > virtio-scsi), then it looks as if the firmware crashes. The total
> > console output is below. It looks as if "c >" is some kind of prompt.
> > qemu spins using 100% of CPU after this.
>
> How much RAM do you pass into the guest? Could you please try to
> increase that size to see whether it makes a difference? If it
> doesn't, Aneesh is your man :)
In the test case we used -m 768.
I reran the test with -m 2048 -- it crashed the same way.
I reran the test with -m 20480 -- it crashed the same way.
Rich.
--
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
virt-df lists disk usage of guests without needing to install any
software inside the virtual machine. Supports Linux and Windows.
http://people.redhat.com/~rjones/virt-df/
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- [Qemu-ppc] [PATCH 27/28] target-ppc: Altivec 2.07: Vector SHA Sigma Instructions, Tom Musta, 2014/02/12
- [Qemu-ppc] [PATCH 28/28] target-ppc: Altivec 2.07: Vector Permute and Exclusive OR, Tom Musta, 2014/02/12
- [Qemu-ppc] [PATCH 19/28] target-ppc: Altivec 2.07: Vector Doubleword Rotate and Shift Instructions, Tom Musta, 2014/02/12
- [Qemu-ppc] [PATCH 18/28] target-ppc: Altivec 2.07: Change Bit Masks to Support 64-bit Rotates and Shifts, Tom Musta, 2014/02/12
- Re: [Qemu-ppc] [Qemu-devel] [PATCH 00/28] target-ppc: Altivec 2.07, Richard W.M. Jones, 2014/02/18
- Re: [Qemu-ppc] [Qemu-devel] [PATCH 00/28] target-ppc: Altivec 2.07, Tom Musta, 2014/02/18
- Re: [Qemu-ppc] [Qemu-devel] [PATCH 00/28] target-ppc: Altivec 2.07, Richard W.M. Jones, 2014/02/20
- Re: [Qemu-ppc] [Qemu-devel] [PATCH 00/28] target-ppc: Altivec 2.07, Richard W.M. Jones, 2014/02/20
- Re: [Qemu-ppc] [Qemu-devel] [PATCH 00/28] target-ppc: Altivec 2.07, Alexander Graf, 2014/02/20
- Re: [Qemu-ppc] [Qemu-devel] [PATCH 00/28] target-ppc: Altivec 2.07,
Richard W.M. Jones <=
- Re: [Qemu-ppc] [Qemu-devel] [PATCH 00/28] target-ppc: Altivec 2.07, Aneesh Kumar K.V, 2014/02/21
- Re: [Qemu-ppc] [Qemu-devel] [PATCH 00/28] target-ppc: Altivec 2.07, Avik Sil, 2014/02/21
- Re: [Qemu-ppc] [Qemu-devel] [PATCH 00/28] target-ppc: Altivec 2.07, Alexander Graf, 2014/02/21
- Re: [Qemu-ppc] [Qemu-devel] [PATCH 00/28] target-ppc: Altivec 2.07, Peter Maydell, 2014/02/21
- Re: [Qemu-ppc] [Qemu-devel] [PATCH 00/28] target-ppc: Altivec 2.07, Alexander Graf, 2014/02/21
- Re: [Qemu-ppc] [Qemu-devel] [PATCH 00/28] target-ppc: Altivec 2.07, Peter Maydell, 2014/02/21
- Re: [Qemu-ppc] [Qemu-devel] [PATCH 00/28] target-ppc: Altivec 2.07, Nikunj A Dadhania, 2014/02/26
- Re: [Qemu-ppc] [Qemu-devel] [PATCH 00/28] target-ppc: Altivec 2.07, Nikunj A Dadhania, 2014/02/26
- Re: [Qemu-ppc] [Qemu-devel] [PATCH 00/28] target-ppc: Altivec 2.07, Thomas Huth, 2014/02/20
- Re: [Qemu-ppc] [Qemu-devel] [PATCH 00/28] target-ppc: Altivec 2.07, Richard W.M. Jones, 2014/02/20