Messages in this thread | | | Date | Sun, 10 Sep 2006 22:34:40 +0100 | From | Matthew Garrett <> | Subject | Re: [PATCH V3] VIA IRQ quirk behaviour change |
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On Sun, Sep 10, 2006 at 05:30:18PM -0400, Lee Revell wrote:
> Sorry, all I have is anecdotal evidence. The scope of the problem isn't > fully known. Could be related to vendors implementing ACPI using SMM. > Vendors are tight lipped about which hardware is affected because it > understandably annoys users.
I don't know what you really mean by "implementing ACPI" here. Certain queries may generate SMM traps, but I haven't seen any event driven code paths that do[1]. If you're polling hardware you may generate some latency, but I don't think that's any great surprise.
It would be interesting to have a test case under Linux so we could attempt to figure out whether it's an actual problem, or just Windows doing awkward things.
[1] outside sort of obvious stuff like ripping out a hotswap bay and /potentially/ critical battery status to switch on a warning light, but if you hit those situations you're probably pretty much dead anyway
-- Matthew Garrett | mjg59@srcf.ucam.org - 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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