On Tue, Dec 04, 2007 at 03:26:20AM -0800, Andrew Morton wrote: > On Tue, 4 Dec 2007 12:21:00 +0100 Nick Piggin <[EMAIL PROTECTED]> wrote: > > > + * > > + * Cannot support XIP and highmem, because our ->direct_access > > + * routine for XIP must return memory that is always addressable. > > + * If XIP was reworked to use pfns and kmap throughout, this > > + * restriction might be able to be lifted. > > */ > > + gfp_flags = GFP_NOIO | __GFP_ZERO; > > +#ifndef CONFIG_BLK_DEV_XIP > > + gfp_flags |= __GFP_HIGHMEM; > > +#endif > > A dubious tradeoff?
On big highmem machines certainly. It may be somewhat useful on small memory systems... but having the config option there is nice for a VM developer without an s390 easily available ;) But don't apply these XIP patches yet -- after a bit more testing I'm seeing some data corruption, so I'll have to work out what's going wrong with that first. - To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
