Messages in this thread | | | Date | Sat, 27 Feb 2010 12:03:09 -0800 | From | "H. Peter Anvin" <> | Subject | Re: [GIT PULL] x86/cpu changes for v2.6.34 |
| |
On 02/27/2010 09:10 AM, Arjan van de Ven wrote: > On Sat, 27 Feb 2010 16:09:42 +0100 > Ingo Molnar <mingo@elte.hu> wrote: > >> +int wbinvd_on_all_cpus(void) >> +{ >> + return on_each_cpu(__wbinvd, NULL, 1); >> +} > > does this make sense at all? > > doesn't cache coherency on x86 already guarantee this? >
No, WBINVD (unlike CLFLUSH) is local to one CPU.
-hpa
-- H. Peter Anvin, Intel Open Source Technology Center I work for Intel. I don't speak on their behalf.
| |