Hey Randy! thanks for the quick response... wanted to start a new build :-). - Sedat - On Thu, Sep 9, 2010 at 5:23 PM, Randy Dunlap <randy.dunlap@xxxxxxxxxx> wrote: > On Thu, 9 Sep 2010 17:10:34 +0200 Sedat Dilek wrote: > >> Hi, >> >> while build latest 2.6.36-rc3 I get this warning: >> >> [ build.log] >> ... >> warning: (COMPACTION && EXPERIMENTAL && HUGETLB_PAGE && MMU) selects >> MIGRATION which has unmet direct dependencies (NUMA || >> ARCH_ENABLE_MEMORY_HOTREMOVE) >> ... >> >> Here the excerpt of... >> >> [ mm/Kconfig ] >> ... >> # support for memory compaction >> config COMPACTION >> bool "Allow for memory compaction" >> select MIGRATION >> depends on EXPERIMENTAL && HUGETLB_PAGE && MMU >> help >> Allows the compaction of memory for the allocation of huge pages. >> ... >> >> I have set the following kernel-config parameters: >> >> $ egrep 'COMPACTION|HUGETLB_PAGE|MMU|MIGRATION|NUMA|ARCH_ENABLE_MEMORY_HOTREMOVE' >> linux-2.6.36-rc3/debian/build/build_i386_none_686/.config >> CONFIG_MMU=y >> # CONFIG_IOMMU_HELPER is not set >> CONFIG_IOMMU_API=y >> CONFIG_COMPACTION=y >> CONFIG_MIGRATION=y >> CONFIG_MMU_NOTIFIER=y >> CONFIG_HUGETLB_PAGE=y >> # CONFIG_IOMMU_STRESS is not set >> >> Looks like I have no NUMA or ARCH_ENABLE_MEMORY_HOTREMOVE set. >> >> Ok, it is a *warning*... > > > Andrea Arcangeli posted a patch for this on linux-mm on 2010-SEP-03. > (below) > > --- > From: Andrea Arcangeli <aarcange@xxxxxxxxxx> > > COMPACTION enables MIGRATION, but MIGRATION spawns a warning if numa > or memhotplug aren't selected. However MIGRATION doesn't depend on > them. I guess it's just trying to be strict doing a double check on > who's enabling it, but it doesn't know that compaction also enables > MIGRATION. > > Signed-off-by: Andrea Arcangeli <aarcange@xxxxxxxxxx> > --- > > diff --git a/mm/Kconfig b/mm/Kconfig > --- a/mm/Kconfig > +++ b/mm/Kconfig > @@ -189,7 +189,7 @@ config COMPACTION > config MIGRATION > bool "Page migration" > def_bool y > - depends on NUMA || ARCH_ENABLE_MEMORY_HOTREMOVE > + depends on NUMA || ARCH_ENABLE_MEMORY_HOTREMOVE || COMPACTION > help > Allows the migration of the physical location of pages of processes > while the virtual addresses are not changed. This is useful in > -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href