Messages in this thread |  | | Date | Thu, 5 Aug 2004 08:39:29 -0700 | | From | Grant Grundler <> | | Subject | Re: [Fastboot] Re: [BROKEN PATCH] kexec for ia64 |
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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.
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