On Mon, Aug 20 2012 at 9:58am -0400, Christoph Hellwig <[email protected]> wrote:
> On Mon, Aug 20, 2012 at 09:57:39AM -0400, Mike Snitzer wrote: > > But I haven't put my finger on _why_ a discard bio has bio->bi_io_vec > > (but given my use of DM, bio comes from bio_alloc_bioset, and DM passes > > original bio->bi_max_vecs for nr_iovecs). > > TRIM has a payload and we cheay by preallocation a data page for it. Thought we pushed that down? Hence sd_setup_discard_cmnd's alloc_page + blk_add_request_payload hack. -- 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/
