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Hi all,

With help from others, I've been able to get Olaf's patch for enabling
MTUs >1500 for vifX.y and tapZ devices working. I've been able to boot
dom0, launch domU and live-migrate without having the bridge's MTU
degrade at any time.

Would the Xen RPM maintainers (and others) mind taking a look at the
following patches?

Kernel part:
https://bugzilla.redhat.com/show_bug.cgi?id=697021

Scripts part:
https://bugzilla.redhat.com/show_bug.cgi?id=697310

I've tested these on systems with stock MTUs of 1500 and they didn't
cause me any troubles.

If they can be tested and/or signed off on for the next round of RPMs,
I'd be very grateful. :)

--
Madison Kelly - Interlink sysadmin and tech support
Office: 416-585-9971 x609
Cell: 647-501-5200 (emergencies)
Skype: interlink.support
IRC: digimer (freenode.net)

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if the patch will be merged in mainline?
how to get the patch?

thanks



At 2011-04-23 07:44:54£¬Digimer <linux@alteeve.com> wrote:

>Hi all,
>
> With help from others, I've been able to get Olaf's patch for enabling
>MTUs >1500 for vifX.y and tapZ devices working. I've been able to boot
>dom0, launch domU and live-migrate without having the bridge's MTU
>degrade at any time.
>
> Would the Xen RPM maintainers (and others) mind taking a look at the
>following patches?
>
>Kernel part:
>https://bugzilla.redhat.com/show_bug.cgi?id=697021
>
>Scripts part:
>https://bugzilla.redhat.com/show_bug.cgi?id=697310
>
> I've tested these on systems with stock MTUs of 1500 and they didn't
>cause me any troubles.
>
> If they can be tested and/or signed off on for the next round of RPMs,
>I'd be very grateful. :)
>
>--
>Digimer
>E-Mail: digimer@alteeve.com
>AN!Whitepapers: http://alteeve.com
>Node Assassin: http://nodeassassin.org
>
>_______________________________________________
>Xen-devel mailing list
>Xen-devel@lists.xensource.com
>http://lists.xensource.com/xen-devel

On 04/22/2011 09:40 PM, yue wrote:
> if the patch will be merged in mainline?
> how to get the patch?
>
> thanks

I can't speak to getting it into mainline, but getting it into the Red
Hat el5.6 kernel is what I am hoping will happen soon. If you're in a
pinch, I can upload the patched files for you to download and test. Of
course, that's less preferable than just getting the next RPM updates. :)

--
Digimer
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On 04/22/2011 10:31 PM, Digimer wrote:
> On 04/22/2011 09:40 PM, yue wrote:
>> if the patch will be merged in mainline?
>> how to get the patch?
>>
>> thanks
>
> I can't speak to getting it into mainline, but getting it into the Red
> Hat el5.6 kernel is what I am hoping will happen soon. If you're in a
> pinch, I can upload the patched files for you to download and test. Of
> course, that's less preferable than just getting the next RPM updates. :)

Please use these at your own risk. I've done my best to get it right,
but without Xen folks giving the "all clear", I can't say that they'll
work. Also note: These were tested on a fully up to date EL5.6 (CentOS
5.6) x86_64 system.

Once these are in place, add the desired MTU size to your
/etc/sysconfig/network-scripts/ifcfg-ethX files. You will have to
manually push up the MTU on all interfaces or reboot to get the new MTU
to take effect. Seeing as you'll need to reboot to get access to the new
kernel, that would probably be easiest.

kernel:
http://alteeve.com/xen/RPMS/x86_64/
- Download at least kernel-xen-2.6.18-238.9.3.el5.x86_64.rpm, plus any
other RPMs you feel you need.

Patched scripts:
http://alteeve.com/xen/qemu-ifup -> /etc/xen/
http://alteeve.com/xen/xen-network-common.sh -> /etc/xen/scripts/

--
Digimer
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On Fri, Apr 22, 2011 at 10:31:42PM -0400, Digimer wrote:
> On 04/22/2011 09:40 PM, yue wrote:
> > if the patch will be merged in mainline?
> > how to get the patch?
> >
> > thanks
>
> I can't speak to getting it into mainline, but getting it into the Red
> Hat el5.6 kernel is what I am hoping will happen soon. If you're in a
> pinch, I can upload the patched files for you to download and test. Of
> course, that's less preferable than just getting the next RPM updates. :)
>

The kernel patch is already in xen.git xen/stable-2.6.32.x branch..
Not sure if it'll be in upstream Linux 2.6.39 netback..

How about the toolstack (script) patch? Is it already merged in Xen?

-- Pasi


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On Sat, 2011-04-23 at 18:42 +0100, Pasi Kärkkäinen wrote:
> On Fri, Apr 22, 2011 at 10:31:42PM -0400, Digimer wrote:
> > On 04/22/2011 09:40 PM, yue wrote:
> > > if the patch will be merged in mainline?
> > > how to get the patch?
> > >
> > > thanks
> >
> > I can't speak to getting it into mainline, but getting it into the Red
> > Hat el5.6 kernel is what I am hoping will happen soon. If you're in a
> > pinch, I can upload the patched files for you to download and test. Of
> > course, that's less preferable than just getting the next RPM updates. :)
> >
>
> The kernel patch is already in xen.git xen/stable-2.6.32.x branch..
> Not sure if it'll be in upstream Linux 2.6.39 netback..

It should be, the two were in sync at the point netback went upstream.

> How about the toolstack (script) patch? Is it already merged in Xen?
>
> -- Pasi
>
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xensource.com
> http://lists.xensource.com/xen-devel



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On 04/23/2011 02:29 PM, Ian Campbell wrote:
> On Sat, 2011-04-23 at 18:42 +0100, Pasi Kärkkäinen wrote:
>> On Fri, Apr 22, 2011 at 10:31:42PM -0400, Digimer wrote:
>>> On 04/22/2011 09:40 PM, yue wrote:
>>>> if the patch will be merged in mainline?
>>>> how to get the patch?
>>>>
>>>> thanks
>>>
>>> I can't speak to getting it into mainline, but getting it into the Red
>>> Hat el5.6 kernel is what I am hoping will happen soon. If you're in a
>>> pinch, I can upload the patched files for you to download and test. Of
>>> course, that's less preferable than just getting the next RPM updates. :)
>>>
>>
>> The kernel patch is already in xen.git xen/stable-2.6.32.x branch..
>> Not sure if it'll be in upstream Linux 2.6.39 netback..
>
> It should be, the two were in sync at the point netback went upstream.
>
>> How about the toolstack (script) patch? Is it already merged in Xen?
>>
>> -- Pasi

I'm afraid I don't know how to answer either Pasi's or your question, as
I am not familiar with the build environments. All I know is that the
latest kernel from EL5.6 does not have these patches.

Do I need to bring this up with Red Hat perhaps? I'm really quite new to
submitting patches, so I'm not sure if I am missing something.

--
Digimer
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On Sat, 2011-04-23 at 22:52 +0100, Digimer wrote:
> On 04/23/2011 02:29 PM, Ian Campbell wrote:
> > On Sat, 2011-04-23 at 18:42 +0100, Pasi Kärkkäinen wrote:
> >> On Fri, Apr 22, 2011 at 10:31:42PM -0400, Digimer wrote:
> >>> On 04/22/2011 09:40 PM, yue wrote:
> >>>> if the patch will be merged in mainline?
> >>>> how to get the patch?
> >>>>
> >>>> thanks
> >>>
> >>> I can't speak to getting it into mainline, but getting it into the Red
> >>> Hat el5.6 kernel is what I am hoping will happen soon. If you're in a
> >>> pinch, I can upload the patched files for you to download and test. Of
> >>> course, that's less preferable than just getting the next RPM updates. :)
> >>>
> >>
> >> The kernel patch is already in xen.git xen/stable-2.6.32.x branch..
> >> Not sure if it'll be in upstream Linux 2.6.39 netback..
> >
> > It should be, the two were in sync at the point netback went upstream.
> >
> >> How about the toolstack (script) patch? Is it already merged in Xen?
> >>
> >> -- Pasi
>
> I'm afraid I don't know how to answer either Pasi's or your question, as
> I am not familiar with the build environments. All I know is that the
> latest kernel from EL5.6 does not have these patches.
>
> Do I need to bring this up with Red Hat perhaps? I'm really quite new to
> submitting patches, so I'm not sure if I am missing something.

Only Red Hat can update the EL5.6 kernel. The bug you've filed in
bugzilla is sufficient to report the issue, now you just need to be
(very) patient.

Ian.



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