Re: [Xen-devel] hvc0 xvc0 "compatibility"?

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Tue, 2009-06-23 at 16:00 -0400, Dan Magenheimer wrote:
> I have a (RHEL5) guest that I alternate booting with a 2.6.18-xen
> kernel and an upstream kernel.
> 
> Upstream uses hvc0 for the console and 2.6.18-xen uses xvc0.  To
> switch between them, I manually modify /etc/inittab.  If I
> forget to do this, I get no login prompt and have to destroy
> the domain, restart selecting the other kernel, etc.
> 
> Do I recall a patch that allows one of these kernels to
> handle both hvc0 and xvc0?  That would make my life easier.
> Or is this something that can be done in userland?

I think you are thinking of linux-2.6.18-xen.hg 762:a070228ac76e "add
hvc compatibility mode to xencons". If you add xencons=hvc to your
kernel command line then 2.6.18 will use hvc and since pvops will just
ignore the unknown option you won't need to keep switching stuff around.

Ian.

> 
> Thanks,
> Dan
> 
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