RE: "exception Emask: 0x42" errors with 2.6.22.x and SATA drives

["Dermot Bradley" <dermot.bradley@sla-mobile.com>]

Alan Cox wrote:

> > I'm getting the following errors on occasion:
> >
> > Aug 24 13:19:22 playpbx kernel: APIC error on CPU0: 00(40)
> > Aug 24 13:19:33 playpbx kernel: APIC error on CPU0: 40(40)
>
> This is not good.

I've two things in mind to try:

(1) there is 1 newer official BIOS release and 2 beta BIOSes out for
this motherboard. The recent official BIOS (0901) does mention Linux:

   "Fixed Red Hat Enterprise Linux 4 installation failed"

So maybe a BIOS update will fix things.

(2) I will try booting with the "noapic" kernel option to see what
difference that makes.

> Neither are good, the latter is probably a drive firmware problem and
> the kernel will give up using NCQ with it if it keeps doing that,
> which should be just fine.

So I guess these drives should be added to the ata_blacklist_entry in
libata-core.c with ATA_HORKAGE_NONCQ?




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