From: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx> Hi folks, This is an updated series for adding tag pre-allocation support of target fabric descriptor memory, utilizing Kent's latest per-cpu ida bits here, along with Christoph Lameter's latest comments: [PATCH 04/10] idr: Percpu ida http://marc.info/?l=linux-kernel&m=137160026006974&w=2 The first patch is a standalone version of per-cpu-ida, seperate from the full idr rewrite from Kent that is still being discussed. Given that I have a number of other target items aside from this series that depend on this code, I'd like to go ahead and include this standalone version into target-pending/for-next as a v3.12 item. Jens has also expressed interest in a blk-mq conversion to use these per-cpu-ida primatives, so getting this piece merged for v3.12 would make life easier for both of us. ;) The second patch includes target-core setup of se_sess->sess_cmd_map + se_sess->sess_tag_pool resources at session creation time, using fabric independent code in transport_init_session_tags(). The third patch is the initial conversion of vhost-scsi fabric code to use per-cpu ida logic for obtaining a new tcm_vhost_cmd descriptor via vhost_scsi_get_tag() during vhost_work_fn_t->handle_kick() -> vhost_scsi_handle_vq() callback execution. And the forth patch is a vhost-scsi change that adds pre-allocation of per tcm_vhost_cmd descriptor scatterlist + user-space page pointer memory, that allows the last two fast-path allocations to be dropped from tcm_vhost_submission_work() -> vhost_scsi_map_to_sgl() fast-path execution. Please review as v3.12 material. Thanks! --nab Kent Overstreet (1): idr: Percpu ida Nicholas Bellinger (3): target: Add transport_init_session_tags using per-cpu ida vhost/scsi: Convert to per-cpu ida_alloc + ida_free command map vhost/scsi: Add pre-allocation for tv_cmd SGL + upages memory drivers/target/target_core_transport.c | 33 ++++ drivers/vhost/scsi.c | 132 +++++++++---- include/linux/idr.h | 53 ++++++ include/target/target_core_base.h | 5 + include/target/target_core_fabric.h | 1 + lib/idr.c | 316 +++++++++++++++++++++++++++++++- 6 files changed, 501 insertions(+), 39 deletions(-) -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
