On Thu, May 07, 2015 at 08:12:31PM +0800, Ming Lei wrote: > In case of loop, it is quite specific about dirtying READ pages in > direct IO because fs over loop has considered dirtying these pages > already. > > For other cases of ITER_BVEC or ITER_KVEC, if the page is > anonymous or mapped, dirtying is still needed, otherwise > the new written data may be dropped like direct-io from user space.
But those would be user pages. Anyone who passes a kernel page doesn't expect it do be dirtied for normal kernel interfaces. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
