Shaohua Li 466c08c71a [SCSI] don't change sdev starvation list order without request dispatched ... The sdev is deleted from starved list and then try to dispatch from this device. It's quite possible the sdev can't eventually dispatch a request, then the sdev will be in starved list tail. This isn't fair. There are two cases here: 1. unplug path. scsi_request_fn() calls to scsi_target_queue_ready(), then the dev is removed from starved list, but quite possible host queue isn't ready, the dev is moved to starved list without dispatching any request. 2. scsi_run_queue path. It deletes the dev from starved list first (both global and local starved lists), then handles the dev. Then we could have the same process like case 1. This patch fixes the first case. Case 2 isn't fixed, because there is a rare case scsi_run_queue finds host isn't busy but scsi_request_fn finds host is busy (other CPU is faster to get host queue depth). Not deleting the dev from starved list in scsi_run_queue will keep scsi_run_queue looping (though this is very rare case, because host will become busy). Fortunately fixing case 1 already gives big improvement for starvation in my test. In a 12 disk JBOD setup, running file creation under EXT4, this gives 12% more throughput. Signed-off-by: Shaohua Li <shaohua.li@intel.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>		2012-01-16 11:54:04 +04:00
..
aacraid	drivers/scsi/aacraid/commctrl.c: fix mem leak in aac_send_raw_srb()	2012-01-08 14:15:21 -08:00
aic7xxx	treewide: Fix typos in various parts of the kernel, and fix some comments.	2011-12-02 14:57:31 +01:00
aic7xxx_old
aic94xx	Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6	2011-10-28 16:44:18 -07:00
arcmsr
arm
be2iscsi	SCSI updates for post 3.2 merge window	2012-01-10 10:36:08 -08:00
bfa	[SCSI] bfa: Implement LUN Masking feature using the SCSI Slave Callouts.	2012-01-10 17:01:24 -06:00
bnx2fc	[SCSI] bnx2fc: Bumped version to 1.0.9	2011-10-30 14:05:52 +04:00
bnx2i	switch ->is_visible() to returning umode_t	2012-01-03 22:54:55 -05:00
cxgbi	[SCSI] libcxgbi: do not print a message when memory allocation fails	2012-01-10 17:01:21 -06:00
device_handler	[SCSI] scsi_dh_alua: Retry the check-condition in case Mode Parameters Changed	2012-01-10 17:01:24 -06:00
dpt	atomic: use <linux/atomic.h>	2011-07-26 16:49:47 -07:00
fcoe	[SCSI] fcoe: remove double check if skb is nonlinear	2012-01-10 17:01:23 -06:00
fnic
ibmvscsi
isci	[SCSI] isci: fix, prevent port from getting stuck in the 'configuring' state	2012-01-16 11:48:02 +04:00
libfc	Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux	2011-11-06 19:44:47 -08:00
libsas	scsi: Add export.h for EXPORT_SYMBOL/THIS_MODULE as required	2011-10-31 19:31:23 -04:00
lpfc	[SCSI] lpfc 8.3.28: Update driver version to 8.3.28	2011-12-15 10:57:45 +04:00
megaraid	[SCSI] megaraid_sas: Version and Changelog update	2012-01-16 11:28:33 +04:00
mpt2sas	[SCSI] mpt2sas: Removed redundant calling of _scsih_probe_devices() from _scsih_probe	2011-12-15 10:57:43 +04:00
mvsas	[SCSI] mv_sas: OCZ RevoDrive3 & zDrive R4 support	2011-10-31 13:29:01 +04:00
osd	scsi: Fix up files implicitly depending on module.h inclusion	2011-10-31 19:31:24 -04:00
pcmcia
pm8001	[SCSI] isci: export phy events via ->lldd_control_phy()	2011-10-02 13:24:26 -05:00
qla2xxx	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2012-01-08 13:21:22 -08:00
qla4xxx	[SCSI] qla4xxx: Update driver version to 5.02.00-k11	2012-01-10 17:01:23 -06:00
sym53c8xx_2	[SCSI] sym53c8xx: Fix NULL pointer dereference in slave_destroy	2012-01-10 17:01:18 -06:00
.gitignore
3w-9xxx.c	[SCSI] 3w-9xxx: fix iommu_iova leak	2011-09-26 09:28:58 -05:00
3w-9xxx.h
3w-sas.c
3w-sas.h
3w-xxxx.c
3w-xxxx.h
53c700_d.h_shipped
53c700.c
53c700.h
53c700.scr
a100u2w.c
a100u2w.h
a2091.c	scsi: Fix up files implicitly depending on module.h inclusion	2011-10-31 19:31:24 -04:00
a2091.h
a3000.c	scsi: Fix up files implicitly depending on module.h inclusion	2011-10-31 19:31:24 -04:00
a3000.h
a4000t.c
advansys.c
aha152x.c
aha152x.h
aha1542.c
aha1542.h
aha1740.c
aha1740.h
aic7xxx_old.c
atari_NCR5380.c
atari_scsi.c
atari_scsi.h
atp870u.c
atp870u.h
BusLogic.c
BusLogic.h
bvme6000_scsi.c
ch.c
constants.c
dc395x.c
dc395x.h
dmx3191d.c
dpt_i2o.c
dpti.h
dtc.c
dtc.h
eata_generic.h
eata_pio.c
eata_pio.h
eata.c
esp_scsi.c
esp_scsi.h
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
gdth_proc.h
gdth.c
gdth.h	treewide: Fix comment and string typo 'bufer'	2011-12-06 09:53:40 +01:00
gvp11.c	scsi: Fix up files implicitly depending on module.h inclusion	2011-10-31 19:31:24 -04:00
gvp11.h
hosts.c	[SCSI] Make scsi_free_queue() kill pending SCSI commands	2011-10-30 13:20:28 +04:00
hpsa_cmd.h	[SCSI] hpsa: fix potential array overflow in hpsa_update_scsi_devices	2011-10-30 14:34:04 +04:00
hpsa.c	[SCSI] hpsa: do not sleep in atomic context in rmmod path.	2012-01-16 09:47:24 +04:00
hpsa.h	[SCSI] hpsa: detect controller lockup	2011-10-30 14:35:01 +04:00
hptiop.c
hptiop.h
ibmmca.c
imm.c
imm.h
in2000.c
in2000.h
initio.c
initio.h
ipr.c	[SCSI] ipr: add definitions for additional adapter	2011-10-31 13:12:50 +04:00
ipr.h	[SCSI] ipr: add definitions for additional adapter	2011-10-31 13:12:50 +04:00
ips.c	treewide: Fix typos in various parts of the kernel, and fix some comments.	2011-12-02 14:57:31 +01:00
ips.h
iscsi_boot_sysfs.c	switch ->is_visible() to returning umode_t	2012-01-03 22:54:55 -05:00
iscsi_tcp.c	switch ->is_visible() to returning umode_t	2012-01-03 22:54:55 -05:00
iscsi_tcp.h
jazz_esp.c	misc latin1 to utf8 conversions	2012-01-02 13:04:55 +01:00
Kconfig	[SCSI] isci: update version to 1.1	2012-01-16 11:44:54 +04:00
lasi700.c
libiscsi_tcp.c	scsi: Fix up files implicitly depending on module.h inclusion	2011-10-31 19:31:24 -04:00
libiscsi.c	scsi: Fix up files implicitly depending on module.h inclusion	2011-10-31 19:31:24 -04:00
libsrp.c	scsi: Fix up files implicitly depending on module.h inclusion	2011-10-31 19:31:24 -04:00
mac53c94.c	scsi: Fix up files implicitly depending on module.h inclusion	2011-10-31 19:31:24 -04:00
mac53c94.h
mac_esp.c	m68k/mac: cleanup mac_irq_pending	2011-12-10 19:52:46 +01:00
mac_scsi.c	[SCSI] mac_scsi: Remove obsolete IRQ_FLG_* users	2011-12-15 10:57:43 +04:00
mac_scsi.h
Makefile	Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6	2011-10-28 16:44:18 -07:00
megaraid.c
megaraid.h
mesh.c
mesh.h
mvme16x_scsi.c
mvme147.c
mvme147.h
mvumi.c	[SCSI] mvumi: Add Marvell UMI driver	2011-08-27 08:36:58 -06:00
mvumi.h	[SCSI] mvumi: Add Marvell UMI driver	2011-08-27 08:36:58 -06:00
ncr53c8xx.c
ncr53c8xx.h
NCR53c406a.c
NCR5380.c
NCR5380.h
NCR_D700.c
NCR_D700.h
NCR_Q720.c
NCR_Q720.h
nsp32_debug.c
nsp32_io.h
nsp32.c
nsp32.h
osst_detect.h
osst_options.h
osst.c
osst.h
pas16.c
pas16.h
pmcraid.c	SCSI, pmcraid: Fix spelling error in a pmcraid_err() call	2011-12-15 16:35:38 +01:00
pmcraid.h	Remove unneeded version.h includes from drivers/scsi/	2011-09-15 14:57:07 +02:00
ppa.c
ppa.h
ps3rom.c	scsi: Fix up files implicitly depending on module.h inclusion	2011-10-31 19:31:24 -04:00
qla1280.c
qla1280.h
qlogicfas408.c
qlogicfas408.h
qlogicfas.c
qlogicpti.c	[SCSI] qlogicpti: fix timeout	2011-10-16 10:58:52 -05:00
qlogicpti.h
raid_class.c
script_asm.pl
scsi_debug.c
scsi_devinfo.c
scsi_error.c	[SCSI] add flag to skip the runtime PM calls on the host	2012-01-08 19:14:57 -05:00
scsi_ioctl.c
scsi_lib_dma.c	scsi: Add export.h for EXPORT_SYMBOL/THIS_MODULE as required	2011-10-31 19:31:23 -04:00
scsi_lib.c	[SCSI] don't change sdev starvation list order without request dispatched	2012-01-16 11:54:04 +04:00
scsi_logging.h
scsi_module.c
scsi_netlink.c	scsi: Add export.h for EXPORT_SYMBOL/THIS_MODULE as required	2011-10-31 19:31:23 -04:00
scsi_pm.c	[SCSI] runtime resume parent for child's system-resume	2012-01-08 19:14:59 -05:00
scsi_priv.h	[SCSI] scsi_dh: code cleanup and remove the references to scsi_dev_info	2011-12-15 10:55:00 +04:00
scsi_proc.c
scsi_sas_internal.h
scsi_scan.c	[SCSI] fix WARNING: at drivers/scsi/scsi_lib.c:1704	2011-11-09 12:05:23 -06:00
scsi_sysctl.c
scsi_sysfs.c	[SCSI] scsi: Added support for adapter and firmware reset	2011-08-27 08:36:46 -06:00
scsi_tgt_if.c	scsi: Add export.h for EXPORT_SYMBOL/THIS_MODULE as required	2011-10-31 19:31:23 -04:00
scsi_tgt_lib.c
scsi_tgt_priv.h
scsi_trace.c
scsi_transport_api.h
scsi_transport_fc_internal.h
scsi_transport_fc.c	[SCSI] scsi_transport_fc: Clear Devloss Callback Done flag in fc_remote_port_rolechg	2012-01-16 09:37:01 +04:00
scsi_transport_iscsi.c	SCSI updates for post 3.2 merge window	2012-01-10 10:36:08 -08:00
scsi_transport_sas.c	[SCSI] libsas: disable scanning lun > 0 on ata devices	2011-10-02 12:29:19 -05:00
scsi_transport_spi.c	switch ->is_visible() to returning umode_t	2012-01-03 22:54:55 -05:00
scsi_transport_srp_internal.h
scsi_transport_srp.c
scsi_typedefs.h
scsi_wait_scan.c
scsi.c
scsi.h
scsicam.c	fs: move code out of buffer.c	2012-01-03 22:54:07 -05:00
sd_dif.c
sd.c	[SCSI] sd: check runtime PM status in sd_shutdown	2012-01-08 19:14:57 -05:00
sd.h	[SCSI] sd: remove arbitrary SD_MAX_DISKS namespace limit	2011-10-30 12:58:11 +04:00
ses.c
sg.c	switch procfs to umode_t use	2012-01-03 22:54:56 -05:00
sgiwd93.c
sim710.c
sni_53c710.c	misc latin1 to utf8 conversions	2012-01-02 13:04:55 +01:00
sr_ioctl.c	scsi: Fix up files implicitly depending on module.h inclusion	2011-10-31 19:31:24 -04:00
sr_vendor.c
sr.c	[SCSI] sr: check_events() ignore GET_EVENT when TUR says otherwise	2011-07-21 14:15:58 -07:00
sr.h	[SCSI] sr: check_events() ignore GET_EVENT when TUR says otherwise	2011-07-21 14:15:58 -07:00
st_options.h
st.c	[SCSI] st: fix race in st_scsi_execute_end	2011-10-30 13:27:28 +04:00
st.h
stex.c
sun3_NCR5380.c
sun3_scsi_vme.c
sun3_scsi.c
sun3_scsi.h
sun3x_esp.c
sun_esp.c
sym53c416.c
sym53c416.h
t128.c
t128.h
tmscsim.c
tmscsim.h
u14-34f.c
ultrastor.c
ultrastor.h
vmw_pvscsi.c	treewide: Fix typos in various parts of the kernel, and fix some comments.	2011-12-02 14:57:31 +01:00
vmw_pvscsi.h
wd33c93.c
wd33c93.h
wd7000.c
zalon.c
zorro7xx.c