Messages in this thread | | | Date | Fri, 27 Sep 2002 08:46:01 +0200 | From | Jan Kasprzak <> | Subject | Re: AMD 768 erratum 10 (solved: AMD 760MPX DMA lockup) |
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Manfred Spraul wrote: : The errata is not PS/2 mouse specific: : it says that the io apic doesn't implement masking interrupts correctly.
Yes, but it says that problem has not been observed when running with PS/2 mouse. Which is exactly what I observe on my system. : : Linux uses masking aggressively - disable_irq() is implemented by : masking the interrupt in the io apic. I'm surprised that this doesn't : cause frequent problems.
The errata does not say that the interrupt masking in the IO-APIC does not work in all situations. I read it as the lock-up (caused by nonfunctional IRQ masking) sometimes occurs, nobody knows when, and it has been observed on some Netware boxes w/o the PS/2 mouse. Maybe even AMD does not know exactly what is going on there.
: Regarding Jan's problem: I'm not sure if his problems are related to : this errata. It says that using a PS/2 mouse instead of a serial mouse : with Novell Netward avoids the hang during shutdown, probably because : then netware doesn't mask the irq.
Yes, it may be a faulty board as well, but I think it is too close to this AMD errata.
-Yenya
-- | Jan "Yenya" Kasprzak <kas at {fi.muni.cz - work | yenya.net - private}> | | GPG: ID 1024/D3498839 Fingerprint 0D99A7FB206605D7 8B35FCDE05B18A5E | | http://www.fi.muni.cz/~kas/ Czech Linux Homepage: http://www.linux.cz/ | |----------- If you want the holes in your knowledge showing up -----------| |----------- try teaching someone. -- Alan Cox -----------| - 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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