On Fri, Feb 26, 2010 at 04:25:21PM +0000, Catalin Marinas wrote: > For mmap'ed pages (and present in the page cache), is it guaranteed that > the HCD driver won't write to it once it has been mapped into user > space? If that's the case, it may solve the problem by just reversing > the meaning of PG_arch_1 on ARM and assume that a newly allocated page > has dirty D-cache by default. I guess we could also set PG_arch_1 in the DMA API as well, to avoid the unnecessary D cache flushing when clean pages get mapped into userspace. -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
