| Date | Mon, 02 Jul 2012 00:58:17 -0400 | From | Rik van Riel <> | Subject | Re: [PATCH 34/40] autonuma: add CONFIG_AUTONUMA and CONFIG_AUTONUMA_DEFAULT_ENABLED |
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On 06/28/2012 08:56 AM, Andrea Arcangeli wrote: > Add the config options to allow building the kernel with AutoNUMA. > > If CONFIG_AUTONUMA_DEFAULT_ENABLED is "=y", then > /sys/kernel/mm/autonuma/enabled will be equal to 1, and AutoNUMA will > be enabled automatically at boot. > > CONFIG_AUTONUMA currently depends on X86, because no other arch > implements the pte/pmd_numa yet and selecting =y would result in a > failed build, but this shall be relaxed in the future. Porting > AutoNUMA to other archs should be pretty simple. > > Signed-off-by: Andrea Arcangeli<aarcange@redhat.com>
The Makefile changes could be merged into this patch
> diff --git a/mm/Kconfig b/mm/Kconfig > index 82fed4e..330dd51 100644 > --- a/mm/Kconfig > +++ b/mm/Kconfig > @@ -207,6 +207,19 @@ config MIGRATION > pages as migration can relocate pages to satisfy a huge page > allocation instead of reclaiming. > > +config AUTONUMA > + bool "Auto NUMA" > + select MIGRATION > + depends on NUMA&& X86
How about having the x86 architecture export a HAVE_AUTONUMA flag, and testing for that?
> + help > + Automatic NUMA CPU scheduling and memory migration.
This could be expanded to list advantages and disadvantages of having autonuma enabled.
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