Martin Svec 8f67835f1e target/rd: improve sg_table lookup scalability ...

Sequential scan of rd_dev->sg_table_array in rd_get_sg_table is
a serious I/O performance bottleneck for large rd LUNs. Fix this
by computing the sg_table index directly from page offset because
all sg_tables (except the last one) have the same number of pages.

Tested with 90 GiB rd_mcp LUN, where the patch improved maximal
random R/W IOPS by more than 100-150%, depending on actual
hardware and SAN setup.

Signed-off-by: Martin Svec<martin.svec@zoner.cz>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

2013-02-13 11:27:31 -08:00

..

iscsi

iscsi-target: Fix CmdSN comparison (use cmd->cmd_sn instead of cmd->stat_sn)

2013-01-10 21:00:37 -08:00

loopback

target: kill struct se_subsystem_dev

2012-11-06 20:55:43 -08:00

sbp

sbp-target: fix error path in sbp_make_tpg()

2012-12-12 21:17:25 -08:00

tcm_fc

tcm_fc: Do not report target role when target is not defined

2013-01-10 20:08:58 -08:00

Kconfig

sbp-target: Initial merge of firewire/ieee-1394 target mode support

2012-05-09 15:25:17 -07:00

Makefile

target: move code for CDB emulation

2012-07-16 17:27:45 -07:00

target_core_alua.c

target: Use TCM_NO_SENSE for initialisation

2013-01-10 20:07:10 -08:00

target_core_alua.h

target: pass sense_reason as a return value

2012-11-06 20:55:46 -08:00

target_core_configfs.c

target/configfs: use kmalloc() instead of kzalloc() for default groups

2012-11-27 22:49:24 -08:00

target_core_device.c

target: Fix divide by zero bug in fabric_max_sectors for unconfigured devices

2013-01-31 15:22:53 -08:00

target_core_fabric_configfs.c

target: Fix regression allowing unconfigured devices to fabric port link

2013-01-31 15:13:23 -08:00

target_core_fabric_lib.c

target: Update copyright information to 2012

2012-11-27 22:47:02 -08:00

target_core_file.c

target/file: merge fd_do_readv() and fd_do_writev()

2012-12-05 13:09:45 -08:00

target_core_file.h

target: kill struct se_subsystem_dev

2012-11-06 20:55:43 -08:00

target_core_hba.c

target: Update copyright information to 2012

2012-11-27 22:47:02 -08:00

target_core_iblock.c

target: Make spc_get_write_same_sectors return sector_t

2012-11-27 22:49:25 -08:00

target_core_iblock.h

target: kill struct se_subsystem_dev

2012-11-06 20:55:43 -08:00

target_core_internal.h

target: Add/check max_write_same_len device attribute + update block limits VPD

2012-11-15 12:27:21 -08:00

target_core_pr.c

target: Use TCM_NO_SENSE for initialisation

2013-01-10 20:07:10 -08:00

target_core_pr.h

target: pass sense_reason as a return value

2012-11-06 20:55:46 -08:00

target_core_pscsi.c

target: Update copyright information to 2012

2012-11-27 22:47:02 -08:00

target_core_pscsi.h

target: kill struct se_subsystem_dev

2012-11-06 20:55:43 -08:00

target_core_rd.c

target/rd: improve sg_table lookup scalability

2013-02-13 11:27:31 -08:00

target_core_rd.h

target: kill struct se_subsystem_dev

2012-11-06 20:55:43 -08:00

target_core_sbc.c

target: Fix zero-length READ_CAPACITY_16 regression

2013-01-29 14:24:26 -08:00

target_core_spc.c

target: Export SPC inquiry emulation

2013-02-13 11:27:22 -08:00

target_core_stat.c

target: Update copyright information to 2012

2012-11-27 22:47:02 -08:00

target_core_tmr.c

target: Remove useless if statement

2013-02-13 11:27:22 -08:00

target_core_tpg.c

target/iscsi_target: Add NodeACL tags for initiator group support

2012-12-13 14:18:09 -08:00

target_core_transport.c

target: Release se_cmd when LUN lookup fails for TMR

2013-01-10 21:00:36 -08:00

target_core_ua.c

target: Update copyright information to 2012

2012-11-27 22:47:02 -08:00

target_core_ua.h

target: pass sense_reason as a return value

2012-11-06 20:55:46 -08:00