On Wed, Jan 05, 2011 at 01:55:05PM -0500, Trond Myklebust wrote: > On Wed, 2011-01-05 at 18:27 +0000, Russell King - ARM Linux wrote: > > I do still think you need _something_ there, otherwise data can remain > > in the direct map alias and not be visible via the vmap alias. I don't > > see that we have anything in place to handle this at present though. > > Is that perhaps what flush_kernel_dcache_page() is supposed to do? Well, given how we have things currently setup on ARM, this ends up being a no-op - as new page cache pages are marked dirty and their flushing done at the point when they're mapped into userspace. I guess we could do the flushing there and mark the page clean, but it'd need some careful examination of various code paths to confirm that it's safe - we may be avoiding this because some ARM arch versions need to manually IPI cache flushes to other cores (which can only be done with IRQs enabled.) So, I don't think it'll do at the present time. -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
