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Christoph Hellwig bebe2fdc17 target: stop splitting commands into multiple tasks 
From hch:

The high-performance backends (iblock and rd) support tasks of unlimited
size.  With that there is no reason to keep a complex infrastructure for
splitting up commands in place.  Stop doing so and only submit a single
task per data direction.  Once this is in place we can slowly remove fields
from the task that duplicate things in the command, or move other fields
into the command.

From nab:

The benefit to IBLOCK performance by removing the additional
fast-path allocation overhead + SGL mapping to se_task->task_sg[] is now
greater than transparently supporting an received CDB I/O length that
exceeds what is allowed by backend pSCSI LLD hardware max_sectors, that
was originally supported for all backend export cases.

This change may effect some users of pSCSI users on legacy hardware, but
I think most folks are now using TYPE_DISK struct scsi_device export
with IBLOCK.  The only other place where this may can issues that cannot
be resolved with IBLOCK TYPE_DISK is using TYPE_ROM, TYPE_TAPE or other
pSCSI non TYPE_DISK export with an SCSI LLDs using a smaller
max_sectors.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
 		2012-04-14 17:40:31 -07:00
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accessibility
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acpi Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux 2012-04-06 19:56:04 -07:00
amba
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ata 1) AHCI regression fix. A recent "make driver conform to spec" change 2012-03-22 20:22:30 -07:00
atm Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
auxdisplay
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base regmap: A couple of small fixes for 3.4 2012-04-07 09:56:00 -07:00
bcma
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block Two fixes for regressions: 2012-04-06 17:54:53 -07:00
bluetooth Merge branch 'akpm' (Andrew's patch-bomb) 2012-04-05 15:30:34 -07:00
cdrom
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char Merge branch 'stable' of git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile 2012-04-06 17:56:20 -07:00
clk
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clocksource Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-arm 2012-03-29 16:53:48 -07:00
connector
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cpufreq ARM: SoC fixes for 3.4-rc2 2012-04-05 22:13:39 -07:00
cpuidle Merge branches 'idle-fix' and 'misc' into release 2012-04-06 21:48:59 -04:00
crypto Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2012-03-22 18:15:32 -07:00
dca
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devfreq ARM: global cleanups 2012-03-27 16:03:32 -07:00
dio
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dma Merge branch 'akpm' (Andrew's patch-bomb) 2012-04-05 15:30:34 -07:00
edac Merge branch 'stable' of git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile 2012-04-06 17:56:20 -07:00
eisa
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firewire Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
firmware
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gpio gpio: tegra: Iterate over the correct number of banks 2012-04-04 13:13:18 -06:00
gpu Merge branch 'akpm' (Andrew's patch-bomb) 2012-04-05 15:30:34 -07:00
hid simple_open: automatically convert to simple_open() 2012-04-05 15:25:50 -07:00
hsi
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hv
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hwmon hwmon: (ad7314) Adds missing spi_dev initialization 2012-04-03 17:08:28 -07:00
hwspinlock
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i2c Disintegrate and delete asm/system.h 2012-03-28 15:58:21 -07:00
ide Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
idle simple_open: automatically convert to simple_open() 2012-04-05 15:25:50 -07:00
ieee802154
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infiniband Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2012-03-29 23:17:44 -07:00
iommu Merge branch 'akpm' (Andrew's patch-bomb) 2012-04-05 15:30:34 -07:00
isdn Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2012-04-02 17:53:39 -07:00
leds MFD changes for 3.4 2012-03-28 13:56:35 -07:00
lguest
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macintosh Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
mca
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md md/raid1,raid10: don't compare excess byte during consistency check. 2012-04-03 15:39:23 +10:00
media ARM: cleanups of io includes 2012-03-29 18:02:10 -07:00
memstick
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message Disintegrate and delete asm/system.h 2012-03-28 15:58:21 -07:00
mfd Merge branch 'akpm' (Andrew's patch-bomb) 2012-04-05 15:30:34 -07:00
misc Merge branch 'akpm' (Andrew's patch-bomb) 2012-04-05 15:30:34 -07:00
mmc mmc: use really long write timeout to deal with crappy cards 2012-04-05 20:32:34 -04:00
mtd Merge branch 'akpm' (Andrew's patch-bomb) 2012-04-05 15:30:34 -07:00
net Merge branch 'stable' of git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile 2012-04-06 17:56:20 -07:00
nfc
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nubus Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
of GPIO changes for v3.4 2012-03-28 14:08:46 -07:00
oprofile simple_open: automatically convert to simple_open() 2012-04-05 15:25:50 -07:00
parisc Disintegrate and delete asm/system.h 2012-03-28 15:58:21 -07:00
parport
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pci Two fixes for regressions: 2012-04-06 17:54:53 -07:00
pcmcia Merge git://git.kernel.org/pub/scm/linux/kernel/git/brodo/pcmcia 2012-03-29 16:00:48 -07:00
pinctrl
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platform Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux 2012-03-30 16:45:39 -07:00
pnp Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux 2012-03-30 16:45:39 -07:00
power Various small bugfixes and enhancements, plus two new drivers: 2012-03-30 16:09:02 -07:00
pps
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ps3
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ptp
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rapidio
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regulator regulator: Fixes for -rc1 2012-04-04 10:09:30 -07:00
remoteproc simple_open: automatically convert to simple_open() 2012-04-05 15:25:50 -07:00
rpmsg
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rtc Merge branch 'akpm' (Andrew's patch-bomb) 2012-04-05 15:30:34 -07:00
s390 Disintegrate and delete asm/system.h 2012-03-28 15:58:21 -07:00
sbus Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
scsi Merge branch 'akpm' (Andrew's patch-bomb) 2012-04-05 15:30:34 -07:00
sfi
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sh SuperH updates for 3.4 merge window 2012-03-30 00:09:17 -07:00
sn
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spi Merge branch 'akpm' (Andrew's patch-bomb) 2012-04-05 15:30:34 -07:00
ssb Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2012-03-20 21:04:47 -07:00
staging Documentation: remove references to /etc/modprobe.conf 2012-03-30 16:03:15 -07:00
target target: stop splitting commands into multiple tasks 2012-04-14 17:40:31 -07:00
tc
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thermal thermal: Fix for setting the thermal zone mode to enable/disable 2012-03-22 01:10:18 -04:00
tty SuperH updates for 3.4-rc1 2012-04-07 09:52:46 -07:00
uio
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usb ARM: SoC fixes for 3.4-rc2 2012-04-05 22:13:39 -07:00
uwb simple_open: automatically convert to simple_open() 2012-04-05 15:25:50 -07:00
vhost Merge branch 'vhost-net' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost 2012-03-23 14:46:48 -04:00
video ARM: SoC fixes for 3.4-rc2 2012-04-05 22:13:39 -07:00
virt
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virtio virtio-pci: switch to PM ops macro to initialise PM functions 2012-03-31 08:09:51 +05:30
vlynq
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w1
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watchdog ARM: cleanups of io includes 2012-03-29 18:02:10 -07:00
xen Two fixes for regressions: 2012-04-06 17:54:53 -07:00
zorro
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Kconfig Merge branch 'for-next' of git://gitorious.org/kernel-hsi/kernel-hsi 2012-04-02 09:50:40 -07:00
Makefile Merge branch 'for-next' of git://gitorious.org/kernel-hsi/kernel-hsi 2012-04-02 09:50:40 -07:00