Re: [RFC PATCH] x86:Use cpu_khz for loops_per_jiffy calculation

Ingo Molnar
2008-06-09T13:12:01Z

* Alok Kataria <akataria@vmware.com> wrote:

> --- linux-2.6.orig/arch/x86/kernel/tsc_32.c 2008-05-27 12:28:16.000000000 -0700
> +++ linux-2.6/arch/x86/kernel/tsc_32.c 2008-06-03 17:28:46.000000000 -0700
> @@ -401,6 +401,7 @@
> void __init tsc_init(void)
> {
> int cpu;
> + u64 lpj;
>
> if (!cpu_has_tsc || tsc_disabled) {
> /* Disable the TSC in case of !cpu_has_tsc */
> @@ -421,6 +422,10 @@
> return;
> }
>
> + lpj = ((u64)cpu_khz * 1000);
> + do_div(lpj, HZ);
> + lpj_tsc = lpj;

that wont work very well as lpj_tsc is not declared.

Ingo