Messages in this thread | | | Date | Thu, 29 Jul 2004 11:17:28 -0700 | From | Andrew Morton <> | Subject | Re: [Fastboot] Re: Announce: dumpfs v0.01 - common RAS output API |
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Alan Cox <alan@lxorguk.ukuu.org.uk> wrote: > > On Iau, 2004-07-29 at 01:22, Andrew Morton wrote: > > eh? People do care. The point here is that we should stop the DMA in the > > dump kernel, not from within the broken kernel. > > And pray just how do you expect to prove that the dump kernel isnt > being overwritten *as* it is being loaded.
It was preloaded.
Of course, there's an assumption here that the dead kernel doesn't scribble on pages which were never available to its page allocator. If DMA somehow goes off and scribbles on the dump kernel we lose.
> > btw, if we simply insert a five-second-pause, what problems does that > > leave? Network Rx, which is OK. Disk writes will have completed (?). > > What remains? > > Network RX is the obvious one since we've no idea where the DMA is > going in memory.
See above. We assume that network RX DMA won't be scribbling in the 16MB which was pre-reserved. That's reasonable. We _have_ to assume that. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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