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Mikulas Patocka bda8efec5c dm io: use fixed initial mempool size 
Replace the arbitrary calculation of an initial io struct mempool size
with a constant.

The code calculated the number of reserved structures based on the request
size and used a "magic" multiplication constant of 4.  This patch changes
it to reserve a fixed number - itself still chosen quite arbitrarily.
Further testing might show if there is a better number to choose.

Note that if there is no memory pressure, we can still allocate an
arbitrary number of "struct io" structures.  One structure is enough to
process the whole request.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
 		2011-05-29 13:03:09 +01:00
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accessibility
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acpi Merge branch 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging 2011-05-25 16:52:50 -07:00
amba ARM: 6829/1: amba: make hardcoded periphid override hardware 2011-05-26 10:33:34 +01:00
ata Merge branch 'for-2.6.40/core' of git://git.kernel.dk/linux-2.6-block 2011-05-25 09:14:07 -07:00
atm
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auxdisplay
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base mm: per-node vmstat: show proper vmstats 2011-05-25 08:39:07 -07:00
bcma drivers/bcma/host_pci.c needs slab.h 2011-05-26 17:12:32 -07:00
block loop: export module parameters 2011-05-27 07:59:25 +02:00
bluetooth Merge git://git.kernel.org/pub/scm/linux/kernel/git/brodo/pcmcia-2.6 2011-05-24 13:28:35 -07:00
cdrom
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char drivers/char/ppdev.c: put gotten port value 2011-05-26 17:12:37 -07:00
clk
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clocksource
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connector
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cpufreq cpufreq: make DB8500 cpufreq driver compile 2011-05-24 22:20:14 +02:00
cpuidle
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crypto
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dca
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dio
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dma Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx 2011-05-28 12:35:15 -07:00
edac edac,rcu: use synchronize_rcu() instead of call_rcu()+rcu_barrier() 2011-05-26 17:12:37 -07:00
eisa
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firewire
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firmware
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gpio Merge branch 'gpio/next' of git://git.secretlab.ca/git/linux-2.6 2011-05-28 10:56:34 -07:00
gpu vmscan: change shrinker API by passing shrink_control struct 2011-05-25 08:39:26 -07:00
hid
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hwmon hwmon: (coretemp) Fix section mismatch 2011-05-27 02:24:54 -07:00
hwspinlock
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i2c mfd: Use mfd cell platform_data for timberdale cells platform bits 2011-05-26 19:45:05 +02:00
ide Merge branch 'for-2.6.40/core' of git://git.kernel.dk/linux-2.6-block 2011-05-25 09:14:07 -07:00
idle
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ieee802154
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infiniband Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband 2011-05-26 12:13:57 -07:00
input input: Add support for Qualcomm PMIC8XXX power key 2011-05-26 19:45:54 +02:00
isdn Merge branch 'trivial' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6 2011-05-26 13:19:00 -07:00
leds leds: Add ASIC3 LED support 2011-05-26 19:45:46 +02:00
lguest
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macintosh
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mca
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md dm io: use fixed initial mempool size 2011-05-29 13:03:09 +01:00
media Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6 2011-05-27 10:14:22 -07:00
memstick
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message
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mfd mfd: Fix build breakage caused by tps65910 gpio directory move 2011-05-28 08:38:55 +02:00
misc kgdbts: unify/generalize gdb breakpoint adjustment 2011-05-26 17:12:36 -07:00
mmc Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm 2011-05-27 19:51:32 -07:00
mtd Merge git://git.infradead.org/mtd-2.6 2011-05-27 20:06:53 -07:00
net Merge git://git.infradead.org/mtd-2.6 2011-05-27 20:06:53 -07:00
nfc
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nubus
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of Merge branch 'devicetree/arm-next' of git://git.secretlab.ca/git/linux-2.6 into devel-stable 2011-05-25 00:08:17 +01:00
oprofile
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parisc
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parport Merge branch 'trivial' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6 2011-05-26 13:19:00 -07:00
pci Merge branch 'drm-core-next' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6 2011-05-24 12:06:40 -07:00
pcmcia
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platform x86: remove 32-bit versions of readq()/writeq() 2011-05-25 08:39:44 -07:00
pnp
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power Merge git://git.infradead.org/battery-2.6 2011-05-27 10:12:35 -07:00
pps
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ps3
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ptp
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rapidio
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regulator regulator: Fix _regulator_get_voltage if get_voltage callback is NULL 2011-05-27 10:49:30 +01:00
rtc drivers/rtc/rtc-mxc.c: remove defines already included in rtc.h 2011-05-26 17:12:33 -07:00
s390 [S390] irq: merge irq.c and s390_ext.c 2011-05-26 09:48:24 +02:00
sbus
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scsi scsi: fix scsi_proc new kernel-doc warning 2011-05-28 23:12:11 -07:00
sfi
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sh
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sn
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spi spi/spi_bfin_sport: new driver for a SPI bus via the Blackfin SPORT peripheral 2011-05-27 01:23:54 -06:00
ssb
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staging Merge branch 'trivial' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6 2011-05-26 13:19:00 -07:00
target [SCSI] target: Convert TASK_ATTR to scsi_tcq.h definitions 2011-05-24 13:03:56 -04:00
tc
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telephony
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thermal
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tty Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm 2011-05-27 19:51:32 -07:00
uio
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usb Merge branch 'for-usb-next' of git://git.kernel.org/pub/scm/linux/kernel/git/sarah/xhci 2011-05-28 12:36:15 -07:00
uwb
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vhost
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video drivers/video/mb862xx/mb862xxfbdrv.c needs uaccess.h 2011-05-26 17:12:32 -07:00
virtio
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vlynq
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w1 w1: add Maxim/Dallas DS2780 Stand-Alone Fuel Gauge IC support 2011-05-26 17:12:38 -07:00
watchdog mfd: Use mfd cell platform_data for rdc321x cells platform bits 2011-05-26 19:45:06 +02:00
xen Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/djm/tmem 2011-05-26 10:50:56 -07:00
zorro
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Kconfig
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Makefile Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx 2011-05-28 12:35:15 -07:00