Re: interrupts on APs

[yamt%mwd.biglobe.ne.jp@localhost (YAMAMOTO Takashi)]

hi,

> On Tue, Nov 29, 2011 at 06:36:23AM +0000, YAMAMOTO Takashi wrote:
>> hi,
>> 
>> > revision 1.62
>> > date: 2009/04/22 21:20:52;  author: ad;  state: Exp;  lines: +6 -2
>> > Route all interrupts back to the BP again, for the time being.
>> > Distributing them is causing strange problems on some systems.
>> 
>> what kind of the strange problems?
>> 
>> i haven't noticed any problems on my system running this reverted.
> 
> Did anyone looks at what linux is doing in this area ? they have
> cpu/chipset/motherboard blaklists for a lot of things ...

only think i'm aware of is the "no_irq_affinity" quirk for E7520/7320/7525.
from their comment:

        /* BIOS may enable hardware IRQ balancing for
         * E7520/E7320/E7525(revision ID 0x9 and below)
         * based platforms.
         * Disable SW irqbalance/affinity on those platforms.
         */

can anyone test on those hardware?

YAMAMOTO Takashi

> 
> -- 
> Manuel Bouyer <bouyer%antioche.eu.org@localhost>
>      NetBSD: 26 ans d'experience feront toujours la difference
> --