lkml.org 
[lkml]   [2008]   [Feb]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] Use global TLB flushes in MTRR code
and old-stable (eg 2.6.22)?

On 2/7/08, Andi Kleen <andi@firstfloor.org> wrote:
> [probably stable material too]
>
> Use global TLB flushes in MTRR code
>
> Obviously kernel mappings should be flushed here too.
>
> Signed-off-by: Andi Kleen <ak@suse.de>
>
> ---
> arch/x86/kernel/cpu/mtrr/generic.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> Index: linux/arch/x86/kernel/cpu/mtrr/generic.c
> ===================================================================
> --- linux.orig/arch/x86/kernel/cpu/mtrr/generic.c
> +++ linux/arch/x86/kernel/cpu/mtrr/generic.c
> @@ -356,7 +356,7 @@ static void prepare_set(void) __acquires
> }
>
> /* Flush all TLBs via a mov %cr3, %reg; mov %reg, %cr3 */
> - __flush_tlb();
> + __flush_tlb_all();
>
> /* Save MTRR state */
> rdmsr(MTRRdefType_MSR, deftype_lo, deftype_hi);
> @@ -368,7 +368,7 @@ static void prepare_set(void) __acquires
> static void post_set(void) __releases(set_atomicity_lock)
> {
> /* Flush TLBs (no need to flush caches - they are disabled) */
> - __flush_tlb();
> + __flush_tlb_all();
>
> /* Intel (P6) standard MTRRs */
> mtrr_wrmsr(MTRRdefType_MSR, deftype_lo, deftype_hi);
> --
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at http://www.tux.org/lkml/
>


--
Thanks,
Oliver


\
 
 \ /
  Last update: 2008-02-07 20:11    [W:0.071 / U:0.076 seconds]
©2003-2011 Jasper Spaans. Advertise on this site