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

From: Alistair John Strachan
Date: Sat Jun 18 2005 - 19:26:29 EST


On Sunday 19 Jun 2005 00:52, Andi Kleen wrote:
> 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.


personal: alistair()devzero!co!uk
university: s0348365()sms!ed!ac!uk
student: CS/CSim Undergraduate
contact: 1F2 55 South Clerk Street,
Edinburgh. EH8 9PP.
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at