Gh0st
/
linux
mirror of https://github.com/torvalds/linux.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity
linux/drivers
History
Tony Battersby c2fd206e08 [SCSI] sym53c8xx: use a queue depth of 1 for untagged devices 
sym53c8xx uses a command queue depth of 2 for untagged devices,
without good reason.  This _mostly_ seems to work ok, but it has
caused me some subtle problems.  For example, I have an application
where one thread sends write commands to a tape drive, and another
thread sends log sense polling commands.  With a queue depth of
2, the polling commands end up being starved for long periods of
time while multiple write commands are serviced (this may also be
related to the fact the the sg driver queues commands in LIFO order).
This problem is fixed by changing the queue depth to 1 for untagged
devices.  I have tested this change extensively with many different
tape drives, medium changers, and disk drives (disk drives of course
use tagged commands and are therefore unaffected by this patch).

Signed-off-by: Tony Battersby <tonyb@cybernetics.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
 		2009-03-12 12:58:17 -05:00
..
accessibility
…
acpi Merge branches 'release', 'bugzilla-12011', 'bugzilla-12632', 'misc' and 'suspend' into release 2009-02-21 22:01:43 -05:00
amba
…
ata [libata] pata_legacy: for VLB 32bit PIO don't try tricks with slop 2009-02-25 15:30:23 -05:00
atm ATM: misplaced parentheses? 2009-02-18 17:41:38 -08:00
auxdisplay
…
base PM: Split up sysdev_[suspend|resume] from device_power_[down|up], fix 2009-02-22 22:09:33 +01:00
block xen/blkfront: use blk_rq_map_sg to generate ring entries 2009-02-26 10:45:48 +01:00
bluetooth
…
cdrom
…
char m68k: atari - Rename "mfp" to "st_mfp" 2009-02-22 09:23:02 -08:00
clocksource
…
connector
…
cpufreq [CPUFREQ] Make ignore_nice_load setting of ondemand work as expected. 2009-02-05 12:25:26 -05:00
cpuidle
…
crypto crypto: ixp4xx - Fix qmgr_request_queue build failure 2009-03-04 08:01:22 +08:00
dca dca: redesign locks to fix deadlocks 2009-02-02 23:26:57 -08:00
dio m68k: dio - Kill resource_size_t format warnings 2009-01-12 20:56:42 +01:00
dma [ARM] fix lots of ARM __devexit sillyness 2009-03-03 21:04:04 +00:00
edac powerpc: More printing warning fixes for the l64 to ll64 conversion 2009-01-28 17:15:52 +11:00
eisa
…
firewire firewire: core: Remove card from list of cards when enable fails 2009-02-01 11:17:24 +01:00
firmware Bernhard has moved 2009-02-18 15:37:56 -08:00
gpio gpiolib: fix request related issue 2009-01-29 18:04:43 -08:00
gpu drm: fix double lock typo 2009-03-04 21:49:14 +10:00
hid HID: move tmff and zpff devices from ignore_list to blacklist 2009-02-17 13:25:01 +01:00
hwmon lis3lv02d: add axes knowledge of HP Pavilion dv5 models 2009-02-18 15:37:54 -08:00
i2c Merge master.kernel.org:/home/rmk/linux-2.6-arm 2009-03-03 14:12:41 -08:00
ide ide: fix refcounting in device drivers 2009-02-25 20:28:24 +01:00
idle
…
ieee1394 Make ieee1394_init a fs-initcall 2009-02-26 10:32:31 -08:00
infiniband Merge branches 'ehca', 'ipoib' and 'mlx4' into for-linus 2009-01-16 15:05:54 -08:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2009-03-02 15:43:03 -08:00
isdn ISDN: fix sc/shmem printk format warning 2009-02-20 00:54:44 -08:00
leds lis3lv02d: merge with leds hp disk 2009-01-15 16:39:40 -08:00
lguest lguest: Fix a memory leak with the lg object during launcher close 2009-01-30 11:34:11 +10:30
macintosh
…
mca
…
md md: avoid races when stopping resync. 2009-02-25 13:18:47 +11:00
media Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2009-03-02 15:43:03 -08:00
memstick memstick: annotate endianness of attribute structs 2009-01-09 16:54:41 -08:00
message [SCSI] mpt: fix disable lsi sas to use msi as default 2009-02-22 08:51:07 -06:00
mfd mfd: Fix sm501_register_gpio section mismatch 2009-02-17 09:48:05 +01:00
misc hpilo: new pci device 2009-02-27 16:26:22 -08:00
mmc sdhci: Add NO_BUSY_IRQ quirk for Marvell CAFE host chip 2009-03-02 21:48:20 +01:00
mtd Merge master.kernel.org:/home/rmk/linux-2.6-arm 2009-03-03 14:12:41 -08:00
net Merge master.kernel.org:/home/rmk/linux-2.6-arm 2009-03-03 14:12:41 -08:00
nubus
…
of drivers/of: Add the of_find_i2c_device_by_node function. 2009-01-09 15:49:06 -07:00
oprofile oprofile: fix uninitialized use of struct op_entry 2009-01-17 17:26:39 +01:00
parisc Documentation: move DMA-mapping.txt to Doc/PCI/ 2009-01-29 18:19:29 -08:00
parport m68k: atari - Rename "mfp" to "st_mfp" 2009-02-22 09:23:02 -08:00
pci Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6 2009-02-26 14:43:42 -08:00
pcmcia powerpc: Change u64/s64 to a long long integer type 2009-01-13 14:47:59 +11:00
platform fujitsu-laptop: Use RFKILL support bitmask from firmware 2009-02-21 21:59:55 -05:00
pnp Merge branch 'linus' into release 2009-01-09 03:39:43 -05:00
power pcf50633_charger: Fix typo 2009-02-02 19:53:02 +03:00
ps3 powerpc/ps3: Printing fixups for l64 to ll64 conversion drivers/ps3 2009-01-16 16:15:14 +11:00
rapidio
…
regulator leds: Fix bounds checking of wm8350->pmic.led 2009-01-30 21:50:49 +00:00
rtc rtc: t reaches -1, tested 0 2009-02-11 14:25:36 -08:00
s390 [SCSI] Remove SUGGEST flags 2009-03-12 12:58:02 -05:00
sbus
…
scsi [SCSI] sym53c8xx: use a queue depth of 1 for untagged devices 2009-03-12 12:58:17 -05:00
serial Merge branch 'sh/for-2.6.29' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6 2009-02-27 16:40:00 -08:00
sh
…
sn
…
spi spi-gpio: sanitize MISO bitvalue 2009-02-18 15:37:56 -08:00
ssb
…
staging Staging: w35und: fix usb_control_msg() error handling in wb35_probe() 2009-02-27 12:56:24 -08:00
tc
…
telephony
…
thermal
…
uio
…
usb [SCSI] Remove SUGGEST flags 2009-03-12 12:58:02 -05:00
uwb uwb: lock rc->rsvs_lock with spin_lock_bh() 2009-01-23 12:57:20 +00:00
video Merge master.kernel.org:/home/rmk/linux-2.6-arm 2009-03-03 14:12:41 -08:00
virtio virtio-pci: do not oops on config change if driver not loaded 2009-02-02 19:17:56 -08:00
w1 w1: add missing Kconfig/Makefile entries for DS2431 slave driver 2009-02-27 16:26:21 -08:00
watchdog Merge master.kernel.org:/home/rmk/linux-2.6-arm 2009-02-19 09:52:12 -08:00
xen PM: Split up sysdev_[suspend|resume] from device_power_[down|up] 2009-02-22 10:33:44 -08:00
zorro m68k: zorro - Use %pR to print resources 2009-01-12 20:56:43 +01:00
Kconfig
…
Makefile Merge branch 'drivers-platform' into release 2009-01-09 04:56:56 -05:00