On Wed, Jul 30, 2008 at 07:33:26AM -0500, Kumar Gala wrote: > > On Jul 29, 2008, at 10:37 PM, Benjamin Herrenschmidt wrote: > > >From: Nick Piggin <[EMAIL PROTECTED]> > > > >Implement lockless get_user_pages_fast for powerpc. Page table > >existence > >is guaranteed with RCU, and speculative page references are used to > >take a > >reference to the pages without having a prior existence guarantee on > >them. > > > >Signed-off-by: Nick Piggin <[EMAIL PROTECTED]> > >Signed-off-by: Dave Kleikamp <[EMAIL PROTECTED]> > >Acked-by: Benjamin Herrenschmidt <[EMAIL PROTECTED]> > >Cc: Paul Mackerras <[EMAIL PROTECTED]> > >Cc: Hugh Dickins <[EMAIL PROTECTED]> > >Cc: "Paul E. McKenney" <[EMAIL PROTECTED]> > >Cc: Peter Zijlstra <[EMAIL PROTECTED]> > >Signed-off-by: Andrew Morton <[EMAIL PROTECTED]> > >--- > > > >I'm going to merge this, sending it to the list for reference, it was > >in -mm for some time , minus some changes/fixes I did to solve > >conflicts > >with the new multiple huge page sizes. > > > >Index: linux-work/arch/powerpc/Kconfig > >=================================================================== > >--- linux-work.orig/arch/powerpc/Kconfig 2008-07-30 > >13:17:06.000000000 +1000 > >+++ linux-work/arch/powerpc/Kconfig 2008-07-30 13:27:40.000000000 > >+1000 > >@@ -42,6 +42,9 @@ config GENERIC_HARDIRQS > > bool > > default y > > > >+config HAVE_GET_USER_PAGES_FAST > >+ def_bool PPC64 > >+ > >config HAVE_SETUP_PER_CPU_AREA > > def_bool PPC64 > > what's ppc64 specific here?
I didn't look how 32-bit powerpc does its TLB shootdown and page table walking, so I don't know if it will work... _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
