RE: Re: bad ip checksums

RE: Re: bad ip checksums

[Ian Pratt]

 

> -----Original Message-----
> From: Chris Bainbridge [mailto:chris.bainbridge@gmail.com] 
> Sent: 06 October 2005 16:54
> To: Ian Pratt
> Cc: xen-devel
> Subject: Re: [Xen-devel] Re: bad ip checksums
> 
> On 06/10/05, Ian Pratt <m+Ian.Pratt@cl.cam.ac.uk> wrote:
> > > > My old 20050929 snapshot works ok. The .config files 
> are identical.
> > > > Kernel config attached. Any ideas on what broke?
> > >
> > > Last nights binary release doesn't have this problem. Is 
> the config 
> > > file available?
> >
> > linux-2.6-sparse/arch/xen/configs
> 
> Using that config, with 7234. I built a dom0 kernel and the 
> problem is still present. Weird. What gcc and binutils are 
> you using? I've got gcc 3.4.4 and binutils-2.15.92.0.2.

The nightly build is done on an FC2 box:

gcc 3.3.3 binutils 2.15.90.0.3

Please can you verify that this is indeed a compiler specific issue.

Thanks,
Ian

Re: Re: bad ip checksums

[Chris Bainbridge]

On 06/10/05, Ian Pratt <m+Ian.Pratt@cl.cam.ac.uk> wrote:
> > >
> > On 06/10/05, Ian Pratt <m+Ian.Pratt@cl.cam.ac.uk> wrote:
> > > > > My old 20050929 snapshot works ok. The .config files
> > are identical.
> > > > > Kernel config attached. Any ideas on what broke?
> > > >
> > > > Last nights binary release doesn't have this problem. Is
> > the config
> > > > file available?
> > >
> > > linux-2.6-sparse/arch/xen/configs
> >
> > Using that config, with 7234. I built a dom0 kernel and the
> > problem is still present. Weird. What gcc and binutils are
> > you using? I've got gcc 3.4.4 and binutils-2.15.92.0.2.
>
> The nightly build is done on an FC2 box:
>
> gcc 3.3.3 binutils 2.15.90.0.3
>
> Please can you verify that this is indeed a compiler specific issue.

Well, I've tried updating to binutils-2.15.91, then downgrading to
gcc-3.3.5 and binutils 2.15.92.0.2, and nothing worked.

It's a mystery. Your binary build works fine, but my kernels built
from source are failing in an odd way. Is it possible to get a
post-patched full xen kernel sources anywhere?

Re: Re: bad ip checksums

[Ted Kaczmarek]

Are you sure these are really bad checksums?

Or is maybe checksum off loading happening somewhere?

Regards,
Ted

RE: Re: bad ip checksums

[Ian Pratt]

 
> Well, I've tried updating to binutils-2.15.91, then downgrading to
> gcc-3.3.5 and binutils 2.15.92.0.2, and nothing worked.
> 
> It's a mystery. Your binary build works fine, but my kernels 
> built from source are failing in an odd way. Is it possible 
> to get a post-patched full xen kernel sources anywhere?

It's incredibly unlikely that you're ending up with a different final
src tree.

What's more likely is that when you build from source you're picking up
an old config file from dist/install/boot that then results in you
getting a duff binary.

Do 'make mrproper' before 'make world' to delete the old configs.

Ian

RE: Re: bad ip checksums

[Ian Pratt]

> > My old 20050929 snapshot works ok. The .config files are identical.
> > Kernel config attached. Any ideas on what broke?
> 
> Last nights binary release doesn't have this problem. Is the 
> config file available?

linux-2.6-sparse/arch/xen/configs

ian

Re: Re: bad ip checksums

[Chris Bainbridge]

On 06/10/05, Ian Pratt <m+Ian.Pratt@cl.cam.ac.uk> wrote:
> > > My old 20050929 snapshot works ok. The .config files are identical.
> > > Kernel config attached. Any ideas on what broke?
> >
> > Last nights binary release doesn't have this problem. Is the
> > config file available?
>
> linux-2.6-sparse/arch/xen/configs

Using that config, with 7234. I built a dom0 kernel and the problem is
still present. Weird. What gcc and binutils are you using? I've got
gcc 3.4.4 and binutils-2.15.92.0.2.