[PATCH] powerpc: ibmveth: Harden driver initilisation for kexec

Michael Ellerman michael at ellerman.id.au
Fri Mar 3 12:10:47 EST 2006

On Fri, 3 Mar 2006 11:34, Randy.Dunlap wrote:
> On Fri, 3 Mar 2006 11:22:45 +1100 Michael Ellerman wrote:
> > Hi Jeff,
> >
> > I realise it's late, but it'd be really good if you could send this up
> > for 2.6.16, we're hosed without it.
> I'm wondering if this means that for every virtual/hypervisor
> situation, we have to modify any $interested_drivers.
> Why wouldn't we come up with a cleaner solution (in the long term)?
> E.g., could the hypervisor know when one of it's virtual OSes
> dies or reboots and release its resources then?

It does exactly that for a regular reboot, but when we kexec we _don't_ die or 
reboot, as far as the Hypervisor is concerned it's all systems go.

It's something of a double-edged sword, we're totally in control which gives 
us lots of flexibility, and _fast_ reboot times, but we also have to do a bit 
of extra stuff (ie. this patch) to keep things sane.


Michael Ellerman
IBM OzLabs

wwweb: http://michael.ellerman.id.au
phone: +61 2 6212 1183 (tie line 70 21183)

We do not inherit the earth from our ancestors,
we borrow it from our children. - S.M.A.R.T Person
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 189 bytes
Desc: not available
Url : http://ozlabs.org/pipermail/linuxppc64-dev/attachments/20060303/911a8749/attachment.pgp 

More information about the Linuxppc64-dev mailing list