Messages in this thread | | | Date | Mon, 28 Apr 2008 15:47:59 -0700 | From | "Yinghai Lu" <> | Subject | Re: [PATCH] x86: mtrr cleanup for converting continuous to discrete layout v5 |
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On Mon, Apr 28, 2008 at 3:36 PM, Randy Dunlap <randy.dunlap@oracle.com> wrote: > 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"
thanks.
YH
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