Messages in this thread | | | Subject | Re: [Fastboot] Re: Announce: dumpfs v0.01 - common RAS output API | From | (Eric W. Biederman) | Date | 28 Jul 2004 17:11:53 -0600 |
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Andrew Morton <akpm@osdl.org> writes:
> Jesse Barnes <jbarnes@engr.sgi.com> wrote: > > > > On Wednesday, July 28, 2004 11:00 am, Eric W. Biederman wrote: > > > > I think this could end up being a good thing. It gives more people a > > > > stake in making sure that driver shutdown() routines work well. > > > > > > Which actually is one of the items open for discussion currently. > > > For kexec on panic do we want to run the shutdown() routines? > > > > We'll have to do something about incoming dma traffic and other stuff that the > > > devices might be doing. Maybe a arch specific callout to do some chipset > > stuff? > > > > Does ongoing DMA actually matter? After all,the memory which is being > dma-ed into is pre-reserved and allocated for that purpose, and the dump > kernel won't be using it.
If we can ensure the addresses where the new kernel will run will never have DMA pointed at them I actually don't think so. This is why last year I recommended building a kernel that runs at a non-default address and finding a way to simply preload it there.
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