On Wed, 2008-01-09 at 22:12 -0600, Linas Vepstas wrote: > On 09/01/2008, Olof Johansson <[EMAIL PROTECTED]> wrote: > > On Wed, Jan 09, 2008 at 08:33:53PM -0600, Linas Vepstas wrote: > > > > > Heh. That's the elbow-grease of this thing. The easy part is to get > > > the core function working. The hard part is to test these various configs, > > > and when they don't work, figure out what went wrong. That will take > > > perseverence and brains. > > > > This just sounds like a whole lot of extra work to get a feature that > > already exists. > > Well, no. kexec is horribly ill-behaved with respect to PCI. The > kexec kernel starts running with PCI devices in some random > state; maybe they're DMA'ing or who knows what. kexec tries > real hard to whack a few needed pci devices into submission > but it has been hit-n-miss, and the source of 90% of the kexec > headaches and debugging effort. Its not pretty.
Isn't that what EEH and the IOMMU are for? :) cheers -- Michael Ellerman OzLabs, IBM Australia Development Lab 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
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