On Fri, 14 Sep 2012 07:27:32 +1000 Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx> wrote: > Hi Andrew, > > On Thu, 13 Sep 2012 12:05:14 -0700 Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> wrote: > > > > diff -puN arch/x86/Kconfig~mm-introduce-have_arch_transparent_hugepage arch/x86/Kconfig > > --- a/arch/x86/Kconfig~mm-introduce-have_arch_transparent_hugepage > > +++ a/arch/x86/Kconfig > > @@ -83,7 +83,6 @@ config X86 > > select IRQ_FORCED_THREADING > > select USE_GENERIC_SMP_HELPERS if SMP > > select HAVE_BPF_JIT if X86_64 > > - select HAVE_ARCH_TRANSPARENT_HUGEPAGE > > Why not > select HAVE_ARCH_TRANSPARENT_HUGEPAGE if MMU > Well, this is in arch/x86/Kconfig, where MMU is known to always be set. Yes, I think Gerald's patch will suffice: --- a/arch/Kconfig~thp-x86-introduce-have_arch_transparent_hugepage +++ a/arch/Kconfig @@ -326,4 +326,7 @@ config HAVE_RCU_USER_QS are already protected inside rcu_irq_enter/rcu_irq_exit() but preemption or signal handling on irq exit still need to be protected. +config HAVE_ARCH_TRANSPARENT_HUGEPAGE + bool + source "kernel/gcov/Kconfig" --- a/arch/x86/Kconfig~thp-x86-introduce-have_arch_transparent_hugepage +++ a/arch/x86/Kconfig @@ -83,6 +83,7 @@ config X86 select IRQ_FORCED_THREADING select USE_GENERIC_SMP_HELPERS if SMP select HAVE_BPF_JIT if X86_64 + select HAVE_ARCH_TRANSPARENT_HUGEPAGE select CLKEVT_I8253 select ARCH_HAVE_NMI_SAFE_CMPXCHG select GENERIC_IOMAP --- a/mm/Kconfig~thp-x86-introduce-have_arch_transparent_hugepage +++ a/mm/Kconfig @@ -318,7 +318,7 @@ config NOMMU_INITIAL_TRIM_EXCESS config TRANSPARENT_HUGEPAGE bool "Transparent Hugepage Support" - depends on X86 && MMU + depends on HAVE_ARCH_TRANSPARENT_HUGEPAGE select COMPACTION help Transparent Hugepages allows the kernel to use huge pages and _ -- 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>