On Wed, Apr 22, 2015 at 04:45:00PM -0700, Andrew Morton wrote: > On Wed, 22 Apr 2015 18:07:50 +0100 Mel Gorman <mgorman@xxxxxxx> wrote: > > > --- a/arch/x86/Kconfig > > +++ b/arch/x86/Kconfig > > @@ -32,6 +32,7 @@ config X86 > > select HAVE_UNSTABLE_SCHED_CLOCK > > select ARCH_SUPPORTS_NUMA_BALANCING if X86_64 > > select ARCH_SUPPORTS_INT128 if X86_64 > > + select ARCH_SUPPORTS_DEFERRED_STRUCT_PAGE_INIT if X86_64 && NUMA > > Put this in the "config X86_64" section and skip the "X86_64 &&"? > Done. > Can we omit the whole defer_meminit= thing and permanently enable the > feature? That's simpler, provides better test coverage and is, we > hope, faster. > Yes. The intent was to have a workaround if there were any failures like Waiman's vmalloc failures in an earlier version but they are bugs that should be fixed. > And can this be used on non-NUMA? Presumably that won't speed things > up any if we're bandwidth limited but again it's simpler and provides > better coverage. Nothing prevents it. There is less opportunity for parallelism but improving coverage is desirable. -- Mel Gorman SUSE Labs -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>