On Thu, Apr 08, 2010 at 09:17:46PM +0200, Peter Zijlstra wrote: > Index: linux-2.6/include/asm-generic/tlb.h > =================================================================== > --- linux-2.6.orig/include/asm-generic/tlb.h > +++ linux-2.6/include/asm-generic/tlb.h > @@ -27,6 +27,49 @@ > #define tlb_fast_mode(tlb) 1 > #endif > > +#ifdef HAVE_ARCH_RCU_TABLE_FREE > +/* > + * Semi RCU freeing of the page directories. > + * > + * This is needed by some architectures to implement gup_fast(). Really? I see the comment in the powerpc code, but powerpc was already using RCU before gup_fast(), and AFAIKS it is indeed using it so that it can handle faults by getting the linux pte with find_linux_pte ? I would have thought this should be a well used method for handling software TLB faults. But anyway this looks like a nice abstraction. -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
