On Fri, 2010-04-30 at 17:11 -0400, John David Anglin wrote: > On Fri, 30 Apr 2010, James Bottomley wrote: > > > It's the essential patch we need to fix up our kmapping. Right at the > > moment kmap of a page with a dirty cache line in userspace sees stale > > data and kunmap of a page the kernel has modified will see likewise. > > Did you try using the version of copy_user_page_asm that uses > equivalent aliasing? There is an issue with needing cache flushing > noted in pgtable.h, but if this works it may be less of a hammer. Not yet. I want to isolate the root cause first before I start adding optimisations. Although the optimisation is a fairly safe one, since it's used by a lot of other architectures. James -- To unsubscribe from this list: send the line "unsubscribe linux-parisc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
