Messages in this thread | | | Subject | Re: [PATCH 09/14] msm: iommu: Kconfig option for cacheable page tables | From | Daniel Walker <> | Date | Sun, 14 Nov 2010 12:17:38 -0800 |
| |
On Fri, 2010-11-12 at 19:29 -0800, Stepan Moskovchenko wrote: > > +config IOMMU_PGTABLES_L2 > + depends on ARCH_MSM8X60 > + depends on MMU > + depends on CPU_DCACHE_DISABLE=n > + depends on SMP > + bool "Cacheable IOMMU page tables" > + default y > + help > + Allows the IOMMU page tables to be brought into the L2 cache. This > + improves the TLB miss latency at the expense of potential pollution > + of the L2 cache. This option has been shown to improve multimedia > + performance in some cases. > + > + If unsure, say Y here.
Why would someone want this off?
The other thing is that you usually want this included with the code that uses the option.
Daniel
-- Sent by an consultant of the Qualcomm Innovation Center, Inc. The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.
| |