AcoSail/kernel_optimize_test
8
0
Fork 0
forked from luck/tmp_suning_uos_patched
Code Pull Requests Activity
f0c0a376d0
kernel_optimize_test/drivers/scsi
History
Mike Christie f0c0a376d0 [SCSI] Add helper code so transport classes/driver can control queueing (v3) 
SCSI-ml manages the queueing limits for the device and host, but
does not do so at the target level. However something something similar
can come in userful when a driver is transitioning a transport object to
the the blocked state, becuase at that time we do not want to queue
io and we do not want the queuecommand to be called again.

The patch adds code similar to the exisiting SCSI_ML_*BUSY handlers.
You can now return SCSI_MLQUEUE_TARGET_BUSY when we hit
a transport level queueing issue like the hw cannot allocate some
resource at the iscsi session/connection level, or the target has temporarily
closed or shrunk the queueing window, or if we are transitioning
to the blocked state.

bnx2i, when they rework their firmware according to netdev
developers requests, will also need to be able to limit queueing at this
level. bnx2i will hook into libiscsi, but will allocate a scsi host per
netdevice/hba, so unlike pure software iscsi/iser which is allocating
a host per session, it cannot set the scsi_host->can_queue and return
SCSI_MLQUEUE_HOST_BUSY to reflect queueing limits on the transport.

The iscsi class/driver can also set a scsi_target->can_queue value which
reflects the max commands the driver/class can support. For iscsi this
reflects the number of commands we can support for each session due to
session/connection hw limits, driver limits, and to also reflect the
session/targets's queueing window.

Changes:
v1 - initial patch.
v2 - Fix scsi_run_queue handling of multiple blocked targets.
Previously we would break from the main loop if a device was added back on
the starved list. We now run over the list and check if any target is
blocked.
v3 - Rediff for scsi-misc.

Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2008-10-13 09:28:46 -04:00
..
aacraid block: unify request timeout handling 2008-10-09 08:56:13 +02:00
aic7xxx
aic7xxx_old
aic94xx [SCSI] replace __FUNCTION__ with __func__ 2008-07-27 10:31:49 -04:00
arcmsr
arm [ARM] Move include/asm-arm/arch-* to arch/arm/*/include/mach 2008-08-07 09:55:48 +01:00
device_handler [SCSI] scsi_dh: suppress comparison warning 2008-10-03 12:11:51 -05:00
dpt removed unused #include <linux/version.h>'s 2008-08-23 12:14:12 -07:00
ibmvscsi block: unify request timeout handling 2008-10-09 08:56:13 +02:00
libsas Merge branch 'for-2.6.28' of git://git.kernel.dk/linux-2.6-block 2008-10-10 10:52:45 -07:00
lpfc removed unused #include <linux/version.h>'s 2008-08-23 12:14:12 -07:00
megaraid block: unify request timeout handling 2008-10-09 08:56:13 +02:00
pcmcia removed unused #include <linux/version.h>'s 2008-08-23 12:14:12 -07:00
qla2xxx [SCSI] qla2xxx: fix printk format warnings 2008-10-03 11:46:19 -05:00
qla4xxx block: unify request timeout handling 2008-10-09 08:56:13 +02:00
sym53c8xx_2 block: unify request timeout handling 2008-10-09 08:56:13 +02:00
.gitignore
3w-9xxx.c [SCSI] 3w-9xxx: add MSI support and misc fixes 2008-07-26 15:15:00 -04:00
3w-9xxx.h [SCSI] 3w-9xxx: add MSI support and misc fixes 2008-07-26 15:15:00 -04:00
3w-xxxx.c Add a bunch of cycle_kernel_lock() calls 2008-06-20 14:05:53 -06:00
3w-xxxx.h
53c700_d.h_shipped
53c700.c [SCSI] Let scsi_cmnd->cmnd use request->cmd buffer 2008-05-02 10:18:22 -05:00
53c700.h
53c700.scr
a100u2w.c Don't crash on IOMMU overflow in A100U2W driver 2008-07-15 14:30:56 -07:00
a100u2w.h
a2091.c
a2091.h
a3000.c
a3000.h
a4000t.c
advansys.c [SCSI] replace __FUNCTION__ with __func__ 2008-07-27 10:31:49 -04:00
aha152x.c [SCSI] replace __FUNCTION__ with __func__ 2008-07-27 10:31:49 -04:00
aha152x.h
aha1542.c
aha1542.h
aha1740.c
aha1740.h
aic7xxx_old.c
atari_dma_emul.c
atari_NCR5380.c
atari_scsi.c
atari_scsi.h
atp870u.c scsi: fix integer as NULL pointer warning 2008-05-23 08:11:07 -07:00
atp870u.h
BusLogic.c
BusLogic.h
bvme6000_scsi.c
ch.c [SCSI] ch: fix ch_remove oops 2008-07-26 15:17:47 -04:00
constants.c [SCSI] add support for variable length extended commands 2008-05-02 11:33:25 -05:00
dc395x.c
dc395x.h
dmx3191d.c
dpt_i2o.c device create: scsi: convert device_create to device_create_drvdata 2008-07-21 21:54:44 -07:00
dpti.h drivers/scsi/dpt_i2o.c: fix build on alpha 2008-05-08 10:46:56 -07:00
dtc.c
dtc.h
eata_generic.h
eata_pio.c
eata_pio.h
eata.c
esp_scsi.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 2008-07-15 18:58:04 -07:00
esp_scsi.h sparc: Kill SBUS DVMA layer. 2008-08-29 02:13:10 -07:00
fd_mcs.c
fdomain.c
fdomain.h
FlashPoint.c
g_NCR5380_mmio.c
g_NCR5380.c
g_NCR5380.h
gdth_ioctl.h
gdth_proc.c block: unify request timeout handling 2008-10-09 08:56:13 +02:00
gdth_proc.h block: unify request timeout handling 2008-10-09 08:56:13 +02:00
gdth.c block: unify request timeout handling 2008-10-09 08:56:13 +02:00
gdth.h block: unify request timeout handling 2008-10-09 08:56:13 +02:00
gvp11.c
gvp11.h
hosts.c [SCSI] scsi_host_lookup: error returns and NULL pointers 2008-10-03 11:46:12 -05:00
hptiop.c remove unnecessary <linux/hdreg.h> includes 2008-08-05 18:16:58 +02:00
hptiop.h
ibmmca.c
ide-scsi.c ide: Remove ide_spin_wait_hwgroup() and use special requests instead 2008-10-10 22:39:40 +02:00
imm.c [SCSI] replace __FUNCTION__ with __func__ 2008-07-27 10:31:49 -04:00
imm.h
in2000.c
in2000.h
initio.c [SCSI] Let scsi_cmnd->cmnd use request->cmd buffer 2008-05-02 10:18:22 -05:00
initio.h
ipr.c block: unify request timeout handling 2008-10-09 08:56:13 +02:00
ipr.h [SCSI] replace __FUNCTION__ with __func__ 2008-07-27 10:31:49 -04:00
ips.c block: unify request timeout handling 2008-10-09 08:56:13 +02:00
ips.h removed unused #include <linux/version.h>'s 2008-08-23 12:14:12 -07:00
iscsi_tcp.c [SCSI] libiscsi, iscsi_tcp, ib_iser: fix setting of can_queue with old tools. 2008-07-12 08:22:29 -05:00
iscsi_tcp.h [SCSI] iscsi_tcp: handle iscsi_cmd_task rename 2008-07-12 08:22:20 -05:00
jazz_esp.c
Kconfig [SCSI] qla2xxx: remove the unused SCSI_QLOGIC_FC_FIRMWARE option 2008-10-03 12:11:51 -05:00
lasi700.c
libiscsi.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 2008-10-10 10:53:26 -07:00
libsrp.c [SCSI] replace __FUNCTION__ with __func__ 2008-07-27 10:31:49 -04:00
mac53c94.c
mac53c94.h
mac_esp.c MODULE_LICENSE expects "GPL v2", not "GPLv2" 2008-05-21 16:56:00 -07:00
mac_scsi.c
mac_scsi.h
Makefile [SCSI] sd: Support for SCSI disk (SBC) Data Integrity Field 2008-07-26 15:14:56 -04:00
megaraid.c Add a bunch of cycle_kernel_lock() calls 2008-06-20 14:05:53 -06:00
megaraid.h
mesh.c [SCSI] SCSI: remove dev->power.power_state from mesh driver 2008-06-05 09:23:44 -05:00
mesh.h
mvme16x_scsi.c
mvme147.c
mvme147.h
mvsas.c drivers/scsi/mvsas.c: fix printk warnings 2008-05-01 08:04:03 -07:00
ncr53c8xx.c block: unify request timeout handling 2008-10-09 08:56:13 +02:00
ncr53c8xx.h
NCR53c406a.c
NCR5380.c
NCR5380.h
NCR_D700.c
NCR_D700.h
NCR_Q720.c
NCR_Q720.h
nsp32_debug.c [SCSI] replace __FUNCTION__ with __func__ 2008-07-27 10:31:49 -04:00
nsp32_io.h
nsp32.c removed unused #include <linux/version.h>'s 2008-08-23 12:14:12 -07:00
nsp32.h removed unused #include <linux/version.h>'s 2008-08-23 12:14:12 -07:00
osst_detect.h
osst_options.h
osst.c Merge commit 'v2.6.26' into bkl-removal 2008-07-14 15:29:34 -06:00
osst.h
pas16.c
pas16.h
ppa.c [SCSI] replace __FUNCTION__ with __func__ 2008-07-27 10:31:49 -04:00
ppa.h
ps3rom.c
ql1040_fw.h
ql1280_fw.h
ql12160_fw.h
qla1280.c block: unify request timeout handling 2008-10-09 08:56:13 +02:00
qla1280.h
qlogicfas408.c
qlogicfas408.h
qlogicfas.c
qlogicpti_asm.c
qlogicpti.c Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6 2008-10-11 12:39:35 -07:00
qlogicpti.h qlogicpti: Convert to pure OF driver. 2008-08-29 02:14:46 -07:00
raid_class.c
script_asm.pl
scsi_debug.c [SCSI] replace __FUNCTION__ with __func__ 2008-07-27 10:31:49 -04:00
scsi_devinfo.c [SCSI] replace __FUNCTION__ with __func__ 2008-07-27 10:31:49 -04:00
scsi_error.c block: unify request timeout handling 2008-10-09 08:56:13 +02:00
scsi_ioctl.c
scsi_lib_dma.c
scsi_lib.c [SCSI] Add helper code so transport classes/driver can control queueing (v3) 2008-10-13 09:28:46 -04:00
scsi_logging.h
scsi_module.c
scsi_netlink.c [SCSI] scsi_netlink: Add transport and LLD recieve and event support 2008-10-03 11:46:13 -05:00
scsi_priv.h block: unify request timeout handling 2008-10-09 08:56:13 +02:00
scsi_proc.c [SCSI] scsi_host_lookup: error returns and NULL pointers 2008-10-03 11:46:12 -05:00
scsi_sas_internal.h
scsi_scan.c [SCSI] Add helper code so transport classes/driver can control queueing (v3) 2008-10-13 09:28:46 -04:00
scsi_sysctl.c
scsi_sysfs.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 2008-10-10 10:53:26 -07:00
scsi_tgt_if.c scsi-tgt: BKL pushdown 2008-07-02 15:06:25 -06:00
scsi_tgt_lib.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 2008-10-10 10:53:26 -07:00
scsi_tgt_priv.h [SCSI] replace __FUNCTION__ with __func__ 2008-07-27 10:31:49 -04:00
scsi_transport_api.h
scsi_transport_fc_internal.h
scsi_transport_fc.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 2008-10-10 10:53:26 -07:00
scsi_transport_iscsi.c [SCSI] scsi_host_lookup: error returns and NULL pointers 2008-10-03 11:46:12 -05:00
scsi_transport_sas.c [SCSI] replace __FUNCTION__ with __func__ 2008-07-27 10:31:49 -04:00
scsi_transport_spi.c [SCSI] scsi_transport_spi: fix oops in revalidate 2008-07-30 10:22:39 -05:00
scsi_transport_srp_internal.h
scsi_transport_srp.c
scsi_typedefs.h
scsi_wait_scan.c
scsi.c [SCSI] Add helper code so transport classes/driver can control queueing (v3) 2008-10-13 09:28:46 -04:00
scsi.h
scsicam.c
sd_dif.c [SCSI] sd: Support for SCSI disk (SBC) Data Integrity Field 2008-07-26 15:14:56 -04:00
sd.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 2008-10-10 10:53:26 -07:00
sd.h Re-introduce "[SCSI] extend the last_sector_bug flag to cover more sectors" 2008-08-05 21:42:21 -07:00
ses.c [SCSI] ses: fix VPD inquiry overrun 2008-07-30 10:21:56 -05:00
sg.c sg: remove unnecessary blk_rq_unmap_user 2008-10-09 08:56:16 +02:00
sgiwd93.c
sim710.c
sni_53c710.c
sr_ioctl.c
sr_vendor.c
sr.c block: unify request timeout handling 2008-10-09 08:56:13 +02:00
sr.h
st_options.h
st.c [SCSI] st: Remove bogus memset 2008-07-26 15:14:47 -04:00
st.h
stex.c [SCSI] stex: fix queue depth setting 2008-07-26 15:14:49 -04:00
sun3_NCR5380.c
sun3_scsi_vme.c
sun3_scsi.c
sun3_scsi.h
sun3x_esp.c
sun_esp.c sparc: Annotate of_device_id arrays with const or __initdata. 2008-08-31 01:23:17 -07:00
sym53c416.c
sym53c416.h
t128.c
t128.h
tmscsim.c [SCSI] tmscsim: Fixup KERN_INFO in printk 2008-10-03 11:46:12 -05:00
tmscsim.h
u14-34f.c [SCSI] u14-34f: Fix 32bit only problem 2008-05-02 13:18:06 -05:00
ultrastor.c
ultrastor.h
wd33c93.c
wd33c93.h
wd7000.c [SCSI] replace __FUNCTION__ with __func__ 2008-07-27 10:31:49 -04:00
zalon.c [SCSI] replace __FUNCTION__ with __func__ 2008-07-27 10:31:49 -04:00
zorro7xx.c