Paul Clements 48f15b93b2 NBD: make nbd default to deadline I/O scheduler ... NBD doesn't work well with CFQ (or AS) schedulers, so let's default to something else. The two problems I have experienced with nbd and cfq are: 1) nbd hangs with cfq on RHEL 5 (2.6.18) -- this may well have been fixed There's a similar debian bug that has been filed as well: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=447638 There have been posts to nbd-general mailing list about problems with cfq and nbd also. 2) nbd performs about 10% better (the last time I tested) with deadline vs. cfq (the overhead of cfq doesn't provide much advantage to nbd [not being a real disk], and you end up going through the I/O scheduler on the nbd server anyway, so it makes sense that deadline is better with nbd) Signed-off-by: Paul Clements <paul.clements@steeleye.com> Cc: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2008-02-23 17:12:15 -08:00
..
acorn/char
acpi	Merge branches 'release', 'bugzilla-9916', 'bugzilla-9982', 'bugzilla-9989', 'misc', 'suspend', 'thermal', 'thinkpad' and 'tsc' into release	2008-02-21 02:41:58 -05:00
amba
ata	PM: Introduce PM_EVENT_HIBERNATE callback state	2008-02-23 10:40:04 -08:00
atm
auxdisplay
base	Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6	2008-02-21 16:33:19 -08:00
block	NBD: make nbd default to deadline I/O scheduler	2008-02-23 17:12:15 -08:00
bluetooth	hci_ldisc: fix null pointer deref	2008-02-12 17:54:16 -08:00
cdrom
char	i915: fix AR register restore.	2008-02-22 16:50:29 -08:00
clocksource
connector
cpufreq	cpufreq: fix kobject reference count handling	2008-02-21 15:27:06 -08:00
cpuidle	ACPI, cpuidle: Clarify C-state description in sysfs	2008-02-14 00:09:55 -05:00
crypto	[HIFN]: Fix invalid config ifdefs for RNG support	2008-02-15 19:15:05 +08:00
dca
dio
dma
edac
eisa
firewire
firmware	dmi: don't save the same device twice	2008-02-23 17:12:14 -08:00
gpio
hid	HID: add USB IDs for MacBook 3rd generation	2008-02-13 17:08:04 +01:00
hwmon	hwmon: normal_i2c arrays should be const	2008-02-18 21:58:15 -05:00
i2c	[ARM] 4827/1: fix two warnings in drivers/i2c/busses/i2c-pxa.c	2008-02-17 10:42:07 +00:00
ide	PM: Introduce PM_EVENT_HIBERNATE callback state	2008-02-23 10:40:04 -08:00
ieee1394
infiniband	IB/mthca: Free correct MPT on error exit from mthca_fmr_alloc()	2008-02-19 10:42:50 -08:00
input
isdn
leds
lguest
macintosh	PM: Introduce PM_EVENT_HIBERNATE callback state	2008-02-23 10:40:04 -08:00
mca
md	dm-raid1.c: fix NULL dereferences	2008-02-19 15:52:27 -08:00
media	V4L/DVB (7219): zoran: Fix namespace conflicts with Zoran 'GPIO_MAX' enum	2008-02-18 12:18:28 -03:00
memstick	drivers/memstick/host/tifm_ms.c breakage	2008-02-13 08:16:35 -08:00
message	[SCSI] mptbase: fix use-after-free's	2008-02-22 09:08:13 -06:00
mfd
misc	Merge branches 'release', 'bugzilla-9916', 'bugzilla-9982', 'bugzilla-9989', 'misc', 'suspend', 'thermal', 'thinkpad' and 'tsc' into release	2008-02-21 02:41:58 -05:00
mmc
mtd	Introduce path_put()	2008-02-14 21:13:33 -08:00
net	Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc	2008-02-21 16:18:05 -08:00
nubus
of
oprofile	d_path: Make get_dcookie() use a struct path argument	2008-02-14 21:17:08 -08:00
parisc
parport	parport: section fixup	2008-02-13 16:21:19 -08:00
pci	copyright owner and author clean up for intel iommu and related files	2008-02-23 17:12:14 -08:00
pcmcia	PCI: drivers/pcmcia/i82092.c: fix up after pci_bus_region changes	2008-02-21 15:34:35 -08:00
pnp	Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6	2008-02-14 21:29:46 -08:00
power
ps3	[POWERPC] PS3: Update sys-manager button events	2008-02-14 22:11:01 +11:00
rapidio
rtc	rtc-cmos: display HPET emulation mode	2008-02-23 17:12:14 -08:00
s390	[S390] qdio: FCP/SCSI write I/O stagnates on LPAR	2008-02-19 15:29:35 +01:00
sbus
scsi	Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6	2008-02-23 12:29:16 -08:00
serial	atmel_serial: fix interrupt handler return value	2008-02-23 17:12:14 -08:00
sh	maple: improve detection of attached peripherals	2008-02-14 14:22:11 +09:00
sn
spi	spi: pxa2xx_spi clock polarity fix	2008-02-23 17:12:14 -08:00
ssb
tc
telephony
thermal	thermal: use ERR_PTR for returning error	2008-02-15 18:21:30 -05:00
uio	UIO: fix Greg's stupid changes	2008-02-21 15:27:07 -08:00
usb	PM: Introduce PM_EVENT_HIBERNATE callback state	2008-02-23 10:40:04 -08:00
video	PM: Introduce PM_EVENT_HIBERNATE callback state	2008-02-23 10:40:04 -08:00
virtio
w1
watchdog	[WATCHDOG] HP ProLiant WatchDog driver	2008-02-18 17:06:21 +00:00
xen
zorro
Kconfig
Makefile