Messages in this thread | | | Date | Thu, 15 Jan 2009 16:34:44 +0100 | From | Olaf Dabrunz <> | Subject | Re: PCI, ACPI, IRQ, IOAPIC: reroute PCI interrupt to legacy boot interrupt equivalent |
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On 13-Jan-09, Olaf Dabrunz wrote: > On 13-Jan-09, Stefan Assmann wrote: > > Hi Jon, > > > > Jon Masters wrote: > > > On Mon, 2009-01-12 at 11:51 -0700, Bjorn Helgaas wrote: > > >> (I added Eric, Maciej, and Jon because they participated in > > >> previous discussion here: http://lkml.org/lkml/2008/6/2/269) > > > > > > Thanks. You know what I'd really like even more than being on the CC? > > > I'd *love* someone to post a link to documentation on how this actually > > > is supposed to work. We had to guess last time because none of the > > > public documentation actually explains this. The guys at SuSE likely > > > received some docs, but I'm not sure where from or the title thereof. > > > > Actually, most of the Boot Interrupt patches resulted from reading the > > intel specs and observing the behavior of failing machines. We're trying > > to wrap up all the information gathered in a paper, which is pretty time > > consuming and a few steps away from being ready to publish. > > We read the specs of the chips, analyzed code, put up hypotheses and > tested them. Then read the specs again, finding new hypotheses and > tested again. Also reading what you guys sent out to lkml and reading > through the public discussions for *BSD, Darwin, XEN etc. helped. > And some colleagues discussed hypotheses and solution attempts with us. > > We summarized many of our end results in a presentation that we gave > internally, and I am working on making this available online (in > addition to the paper/slides that Stefan mentions below).
The presentation can be found at
http://www.suse.de/~odabrunz/Boot_Interrupts_and_IRQ_Threads.pdf
Some parts of it have been corrected and updated.
Please do not miss the "Details" slides after the License and the Disclaimer. The Details should answer many questions.
Thanks,
-- Olaf Dabrunz (od/odabrunz), SUSE Linux Products GmbH, Nürnberg
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