Messages in this thread | | | Date | Mon, 28 Apr 2008 15:36:17 -0700 | From | Randy Dunlap <> | Subject | Re: [PATCH] x86: mtrr cleanup for converting continuous to discrete layout v5 |
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On Mon, 28 Apr 2008 15:05:05 -0700 Yinghai Lu wrote:
> Index: linux-2.6/Documentation/kernel-parameters.txt > =================================================================== > --- linux-2.6.orig/Documentation/kernel-parameters.txt > +++ linux-2.6/Documentation/kernel-parameters.txt > @@ -595,6 +595,16 @@ and is between 256 and 4096 characters. > See drivers/char/README.epca and > Documentation/digiepca.txt. > > + disable_mtrr_cleanup [X86] > + enable_mtrr_cleanup [X86] > + The kernel try to adjust MTRR layout from continuous
tries
> + to discrete, to make x server driver could add WB entry
X server driver able to add WB entry
> + later. This parameter enable/disable that.
enables/disables
> + > + mtrr_chunk_size=nn[KMG] [X86] > + used for mtrr cleanup. It is largest continous chunk > + that could hold holes aka. UC entries. > + > disable_mtrr_trim [X86, Intel and AMD only] > By default the kernel will trim any uncacheable > memory out of your available memory pool based on > Index: linux-2.6/arch/x86/Kconfig > =================================================================== > --- linux-2.6.orig/arch/x86/Kconfig > +++ linux-2.6/arch/x86/Kconfig > @@ -1035,6 +1035,32 @@ config MTRR > > See <file:Documentation/mtrr.txt> for more information. > > +config MTRR_SANITIZER > + def_bool y > + prompt "MTRR cleanup support" > + depends on MTRR > + help > + Convert MTRR layout from continuous to discrete, so some X driver > + could add WB entries. > + > + Say N here if you see bootup problems (boot crash, boot hang, > + spontaneous reboots). > + > + could be disabled with disable_mtrr_cleanup. also mtrr_chunk_size
Could Also
> + could be used to send largest mtrr entry size for continuous block > + to hold holes (aka. UC entries) > + > + If unsure, say Y. > + > +config MTRR_SANITIZER_ENABLE_DEFAULT > + bool > + prompt "MTRR cleanup enable default"
prompt "Enable MTRR cleanup" or prompt "Enable MTRR cleanup by default"
> + depends on MTRR_SANITIZER > + help > + Enable mtrr cleanup by default
default.
> + > + If unsure, say Y. > + > config X86_PAT > bool > prompt "x86 PAT support"
--- ~Randy
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