From: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx> Hi all, Here is -v2 series for converting LIO target se_node_acl + se_lun mapping tables from fixed size arrays to dynamic RCU hlist_heads. This turns fast-path I/O into a lock-less RCU reader using existing percpu based se_lun->lun_ref logic, and converts the RCU updater path to allow for an arbitrary number of LUNs for both types of mappings within target-core. This series also squashes a number of previous se_node_acl RCU related changes into a single commit (#1) for easier review, and to avoid potential bisect issues. There have been a number of changes since -v1, including: - Mirror port->sep_rtpi in lun->lun_rtpi for RCU - Drop unnecessary synchronize_rcu() usage - Convert call_rcu() to kfree_rcu() usage - Move hlist_del_rcu head of rcu_assign_pointer in se_dev_entry - Drop unnecessary lookup deve in target_fabric_mappedlun_unlink() - Add target_lun_is_rdonly helper - Acquire lun_entry_mutex during core_disable_device_list_for_node - Drop TRANSPORT_LUNFLAGS_*_ACCESS usage - Pass se_dev_entry directly to core_disable_device_list_for_node - Convert sbp-target se_lun usage to use ->login_lun - Fix se_session dereference in spc_emulate_report_luns - Fix testing for NULL instead of IS_ERR in fabric_make_lun() - Convert BUG_ON to EINVAL for wrong dynamic -> explicit ACL conversion - Add missing hlist_del_rcu when swapping orig with new - Add HBA_FLAGS_INTERNAL_USE checks in add/remove lun Please review. --nab Christoph Hellwig (1): target/pr: cleanup core_scsi3_pr_seq_non_holder Nicholas Bellinger (8): target: Convert se_node_acl->device_list[] to RCU hlist target/pr: Use atomic bitop for se_dev_entry->pr_reg reservation check target/pr: Change alloc_registration to avoid pr_reg_tg_pt_lun target: Convert se_portal_group->tpg_lun_list[] to RCU hlist target: Convert se_tpg->acl_node_lock to ->acl_node_mutex target: Convert core_tpg_deregister to use list splice target: Drop unused se_lun->lun_acl_list target: Only reset specific dynamic entries during lun_group creation drivers/target/iscsi/iscsi_target_tpg.c | 2 - drivers/target/sbp/sbp_target.c | 97 +++--- drivers/target/sbp/sbp_target.h | 2 +- drivers/target/target_core_configfs.c | 6 +- drivers/target/target_core_device.c | 452 +++++++++++---------------- drivers/target/target_core_fabric_configfs.c | 75 +++-- drivers/target/target_core_internal.h | 17 +- drivers/target/target_core_pr.c | 217 +++++++------ drivers/target/target_core_pscsi.c | 7 +- drivers/target/target_core_spc.c | 18 +- drivers/target/target_core_stat.c | 180 +++++------ drivers/target/target_core_tpg.c | 269 ++++------------ drivers/target/target_core_transport.c | 20 +- drivers/target/target_core_ua.c | 51 ++- drivers/target/tcm_fc/tfc_conf.c | 4 +- drivers/xen/xen-scsiback.c | 27 +- include/target/target_core_backend.h | 2 +- include/target/target_core_base.h | 38 +-- include/target/target_core_fabric.h | 1 - 19 files changed, 634 insertions(+), 851 deletions(-) -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
