Re: [Fastboot] Re: [BROKEN PATCH] kexec for ia64

Grant Grundler
2004-08-05T15:39:29Z

On Wed, Aug 04, 2004 at 08:14:55PM -0600, Eric W. Biederman wrote:
> VGA/serial console devices rarely need to do be bus masters so they
> should be fine.

yeah - you are right. I wasn't thinking.
Can anyone comment on UGA or other console devices?

> In the general case it appears to be overkill, incorrect and
> insufficient to disable bus mastering on all PCI devices. Which is
> why device_shutdown() calls device specific code.

Is anyone else considering using kexec() to recover from a oops/panic?
What is the risk calling multiple device_shutdown() will expose another panic?

While calling a device specific cleanup is best, I worry about how
much code/data gets touched in this path. I was hoping something
simple like twiddling bus master bit would be sufficient.
If it's not, oh well.

thanks,
grant