Re: IDE corruption datapoint

[Alan Cox <alan@redhat.com>]

> FWIW, just like my alim5x3 based Sparcs, I have to boot with ide=nodma
> on my VAIO laptop which uses PIIX chipsets, otherwise I get data
> corruptions.

Ok thats I think a first ever and only report for the VAIO. Are you using
ACPI and what compiler are you using ? Do you have APIC support enabled ?
Does it occur with a vanilla Red Hat 2.4.20- kernel ?

> On the VAIO it shows up as corrupted kernel builds.  The build
> is successful but the images won't boot properly, rebuilding
> the same kernel tree with ide=nodma results in a working image.
> This shows up with both 2.4.21 and 2.4.22-current.

If you cp lots of data around then compare what is the error pattern,
thats basically essential info to debug this as is the drive data,
mode selected and so on

> This suggests, at least to me, that it's something generic in
> the IDE layer of 2.4.x vanilla vs. 2.6.0-test1 that's causing
> the problems, rather than a chipset specific issue.

That would be unlikely since someone found the ali problem with
sparc/alpha but just never bothered to send a patch to fix it.

Alan