Re: [2.6.12] x86-64 IO-APIC + timer doesn't work II + PATCH

[Alistair John Strachan <s0348365@sms.ed.ac.uk>]

Andi,

On Sunday 19 Jun 2005 00:52, Andi Kleen wrote:
[snip]
>
> It's a bit of a shot into the dark, but could you test if the following
> patch helps?  The A64 is quite aggressive in reordering instructions and it
>  might be breaking __delay() and cause it to return early.
>

Firstly, I apologise in the delay getting back to you.

I tried the patch, but the machine still hung in the same way with the options 
apic apic=verbose (I don't know if the first "apic" is required, or whether 
this is an invalid combination of parameters, but it hung in the same way).

> If not I would check what a failing case and a working case output for
>
> Calibrating delay loop... 3940.35 BogoMIPS (lpj=1970176)
>
> Does the failing kernel output something different here?

I'll get back to you about this, but see my other email (a successfully booted 
apic=debug machine). Thanks for investigating this.

-- 
Cheers,
Alistair.

personal:   alistair()devzero!co!uk
university: s0348365()sms!ed!ac!uk
student:    CS/CSim Undergraduate
contact:    1F2 55 South Clerk Street,
            Edinburgh. EH8 9PP.
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