[PATCH] x86/amd: disable way access filter on affected CPUs

2012-10-31 Thread Andre Przywara
From: Andre Przywara The Way Access Filter in recent AMD CPUs may hurt the performance of some workloads, caused by aliasing issues in the L1 cache. This patch disables it on the affected CPUs. The issue is similar to that one of last year:

[PATCH] x86/amd: disable way access filter on affected CPUs

2012-10-31 Thread Andre Przywara
From: Andre Przywara andre.przyw...@amd.com The Way Access Filter in recent AMD CPUs may hurt the performance of some workloads, caused by aliasing issues in the L1 cache. This patch disables it on the affected CPUs. The issue is similar to that one of last year:

Re: [PATCH] x86/amd: disable way access filter on affected CPUs

2012-10-26 Thread Ingo Molnar
* Andre Przywara wrote: > On 10/24/2012 12:46 PM, Ingo Molnar wrote: > > > >* Andre Przywara wrote: > > > >>The WAF may hurt the performance of some workloads, caused by > >>aliasing issues in the L1 cache. > >>Disable it on the affected CPUs. > >> > >>Signed-off-by: Andre Przywara > >>--- >

Re: [PATCH] x86/amd: disable way access filter on affected CPUs

2012-10-26 Thread Ingo Molnar
* Andre Przywara andre.przyw...@amd.com wrote: On 10/24/2012 12:46 PM, Ingo Molnar wrote: * Andre Przywara andre.przyw...@amd.com wrote: The WAF may hurt the performance of some workloads, caused by aliasing issues in the L1 cache. Disable it on the affected CPUs. Signed-off-by:

Re: [PATCH] x86/amd: disable way access filter on affected CPUs

2012-10-24 Thread Andre Przywara
On 10/24/2012 12:46 PM, Ingo Molnar wrote: * Andre Przywara wrote: The WAF may hurt the performance of some workloads, caused by aliasing issues in the L1 cache. Disable it on the affected CPUs. Signed-off-by: Andre Przywara --- arch/x86/kernel/cpu/amd.c | 14 ++ 1 file

Re: [PATCH] x86/amd: disable way access filter on affected CPUs

2012-10-24 Thread Ingo Molnar
* Andre Przywara wrote: > The WAF may hurt the performance of some workloads, caused by > aliasing issues in the L1 cache. > Disable it on the affected CPUs. > > Signed-off-by: Andre Przywara > --- > arch/x86/kernel/cpu/amd.c | 14 ++ > 1 file changed, 14 insertions(+) > > diff

[PATCH] x86/amd: disable way access filter on affected CPUs

2012-10-24 Thread Andre Przywara
The WAF may hurt the performance of some workloads, caused by aliasing issues in the L1 cache. Disable it on the affected CPUs. Signed-off-by: Andre Przywara --- arch/x86/kernel/cpu/amd.c | 14 ++ 1 file changed, 14 insertions(+) diff --git a/arch/x86/kernel/cpu/amd.c

[PATCH] x86/amd: disable way access filter on affected CPUs

2012-10-24 Thread Andre Przywara
The WAF may hurt the performance of some workloads, caused by aliasing issues in the L1 cache. Disable it on the affected CPUs. Signed-off-by: Andre Przywara andre.przyw...@amd.com --- arch/x86/kernel/cpu/amd.c | 14 ++ 1 file changed, 14 insertions(+) diff --git

Re: [PATCH] x86/amd: disable way access filter on affected CPUs

2012-10-24 Thread Ingo Molnar
* Andre Przywara andre.przyw...@amd.com wrote: The WAF may hurt the performance of some workloads, caused by aliasing issues in the L1 cache. Disable it on the affected CPUs. Signed-off-by: Andre Przywara andre.przyw...@amd.com --- arch/x86/kernel/cpu/amd.c | 14 ++ 1 file

Re: [PATCH] x86/amd: disable way access filter on affected CPUs

2012-10-24 Thread Andre Przywara
On 10/24/2012 12:46 PM, Ingo Molnar wrote: * Andre Przywara andre.przyw...@amd.com wrote: The WAF may hurt the performance of some workloads, caused by aliasing issues in the L1 cache. Disable it on the affected CPUs. Signed-off-by: Andre Przywara andre.przyw...@amd.com ---