cvs commit: src/sys/dev/sk if_sk.c if_skreg.h

John Baldwin jhb at
Mon May 1 19:41:28 UTC 2006

On Monday 01 May 2006 15:13, Maxim Sobolev wrote:
> John Baldwin wrote:
> >> BTW, can you check the following URL, it's the changes intel has made 
> >> to ia32 manual after releasing Core Duo. Maybe you can spot something 
> >> there. There are some lapic-related changes.
> >>
> >>
> > 
> > None of the APIC-related changes affect us.  We always access APIC
> > registers using 32-bit loads and stores for example.
> I see, do you have any other ideas why it doesn't work on FreeBSD, while 
> works OOB on Linux 2.6 (reportedly) and definitely on Windows XP SP2? 
> Anything specific in our way of lapic/SMP handling?


> BTW, I have noticed that we don't mark lapic page as noncacheable, which 
> seemingly required by the spec. I have made small change (3 lines), but 
> it doesn't help either.

You can also try the PAT patch which would have the side effect of
forcing the lapic to be mapped UC as well.

> -Maxim
> P.S. I will bring the laptop to BSDCan so that I can let you or anybody 
> else play with it if it helps to fix the problem.

Ok, I'll be there.

John Baldwin <jhb at>  <><
"Power Users Use the Power to Serve"  =

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