On Wed, Apr 6, 2016 at 10:34 AM, Kent Overstreet <kent.overstr...@gmail.com> wrote: > On Wed, Apr 06, 2016 at 10:30:22AM +0800, Ming Lei wrote: >> Now limit.max_segments is for limiting segments from hw view, one this >> segment may include lots of pages/bvecs. >> >> The current bio_clone() issue is that we can't clone from one bio which >> includes more than 256 bvecs, maybe all these 256 bvecs belong to >> one same hw segment. > > So the distinction is purely a post multipage bvec thing?
Even after multipage bvec is applied, the limit for max bvecs is still needed for some cases like bio bounce, in which bio_clone() need to clone single page bvec. Thanks, > -- > To unsubscribe from this list: send the line "unsubscribe linux-block" in > the body of a message to majord...@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html
