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Pauli Nieminen 1403b1a38e drm/ttm: add pool wc/uc page allocator V3 
On AGP system we might allocate/free routinely uncached or wc memory,
changing page from cached (wb) to uc or wc is very expensive and involves
a lot of flushing. To improve performance this allocator use a pool
of uc,wc pages.

Pools are protected with spinlocks to allow multiple threads to allocate pages
simultanously. Expensive operations are done outside of spinlock to maximize
concurrency.

Pools are linked lists of pages that were recently freed. mm shrink callback
allows kernel to claim back pages when they are required for something else.

Fixes:
* set_pages_array_wb handles highmem pages so we don't have to remove them
  from pool.
* Add count parameter to ttm_put_pages to avoid looping in free code.
* Change looping from _safe to normal in pool fill error path.
* Initialize sum variable and make the loop prettier in get_num_unused_pages.

* Moved pages_freed reseting inside the loop in ttm_page_pool_free.
* Add warning comment about spinlock context in ttm_page_pool_free.

Based on Jerome Glisse's and Dave Airlie's pool allocator.

Signed-off-by: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Pauli Nieminen <suokkos@gmail.com>
Reviewed-by: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
2010-04-06 11:35:26 +10:00
..
accessibility
acpi backlight: Allow properties to be passed at registration 2010-03-16 19:47:54 +00:00
amba
ata ahci: pp->active_link is not reliable when FBS is enabled 2010-03-17 15:54:55 -04:00
atm atm: use for_each_set_bit() 2010-03-15 16:00:47 -07:00
auxdisplay auxdisplay: move cfag12864bfb's probe function to .devinit.text 2010-03-07 17:04:50 -08:00
base Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6 2010-03-19 13:39:42 -07:00
block Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2010-03-12 16:04:50 -08:00
bluetooth Bluetooth: Convert Marvell driver to use per adapter debugfs 2010-02-27 14:05:38 +01:00
cdrom
char Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6 2010-03-19 13:40:03 -07:00
clocksource MFGPT: move clocksource menu 2010-03-06 11:26:28 -08:00
connector
cpufreq Driver core: Constify struct sysfs_ops in struct kobj_type 2010-03-07 17:04:49 -08:00
cpuidle Driver core: Constify struct sysfs_ops in struct kobj_type 2010-03-07 17:04:49 -08:00
crypto Merge branch 'for-next' into for-linus 2010-03-08 16:55:37 +01:00
dca
dio
dma Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2010-03-12 16:04:50 -08:00
edac edac: e752x: add dram scrubbing support 2010-03-12 15:52:40 -08:00
eisa eisa: fix coding style for eisa bus code 2010-03-06 11:26:32 -08:00
firewire Driver core: create lock/unlock functions for struct device 2010-03-07 17:04:52 -08:00
firmware Driver core: Constify struct sysfs_ops in struct kobj_type 2010-03-07 17:04:49 -08:00
gpio driver-core: Add attribute argument to class_attribute show/store 2010-03-07 17:04:48 -08:00
gpu drm/ttm: add pool wc/uc page allocator V3 2010-04-06 11:35:26 +10:00
hid Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid 2010-03-18 16:52:31 -07:00
hwmon Merge branch 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging 2010-03-06 11:33:09 -08:00
i2c Add include to i2c-xii.c to fix build error 2010-03-14 11:14:58 -07:00
ide Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/ide-next-2.6 2010-03-04 08:24:06 -08:00
idle
ieee1394 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2010-03-12 16:04:50 -08:00
ieee802154
infiniband Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6 2010-03-19 13:39:42 -07:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2010-03-14 11:13:54 -07:00
isdn gigaset: fix build failure 2010-03-17 14:22:07 -07:00
leds leds: Fix race between LED device uevent and actual attributes creation 2010-03-16 20:27:25 +00:00
lguest
macintosh backlight: Allow properties to be passed at registration 2010-03-16 19:47:54 +00:00
mca
md Merge branch 'for-linus' of git://neil.brown.name/md 2010-03-18 16:55:24 -07:00
media Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2010-03-14 11:13:54 -07:00
memstick
message Merge branch 'for-next' into for-linus 2010-03-08 16:55:37 +01:00
mfd Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6 2010-03-12 16:41:09 -08:00
misc init dynamic bin_attribute structures 2010-03-14 20:28:39 -07:00
mmc Merge branch 'msm-mmc_sdcc' of git://codeaurora.org/quic/kernel/dwalker/linux-msm 2010-03-12 16:21:24 -08:00
mtd Delete zero-length file drivers/mtd/maps/omap_nor.c 2010-03-19 14:25:45 -04:00
net Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6 2010-03-19 13:39:42 -07:00
nubus
of
oprofile
parisc Driver core: Constify struct sysfs_ops in struct kobj_type 2010-03-07 17:04:49 -08:00
parport Merge branch 'for-next' into for-linus 2010-03-08 16:55:37 +01:00
pci Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6 2010-03-19 13:39:42 -07:00
pcmcia PCMCIA: resource, fix lock imbalance 2010-03-16 17:54:58 +01:00
platform backlight: panasonic-laptop - Fix incomplete registration failure handling 2010-03-16 20:13:31 +00:00
pnp PNPACPI: add bus number support 2010-03-14 20:08:38 -04:00
power Merge branches 'battery-2.6.34', 'bugzilla-10805', 'bugzilla-14668', 'bugzilla-531916-power-state', 'ht-warn-2.6.34', 'pnp', 'processor-rename', 'sony-2.6.34', 'suse-bugzilla-531547', 'tz-check', 'video' and 'misc-2.6.34' into release 2010-03-14 21:30:17 -04:00
pps pps: serial clients support 2010-03-12 15:52:43 -08:00
ps3
rapidio
regulator regulator: Add max8925 support 2010-03-07 22:17:08 +01:00
rtc init dynamic bin_attribute structures 2010-03-14 20:28:39 -07:00
s390 memory hotplug/s390: set phys_device 2010-03-17 18:43:47 -07:00
sbus
scsi Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 2010-03-18 16:54:31 -07:00
serial Merge git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6 2010-03-19 18:16:20 -07:00
sfi
sh Merge git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6 2010-03-19 18:16:20 -07:00
sn
spi Merge branch 'merge' of git://git.secretlab.ca/git/linux-2.6 2010-03-18 17:01:19 -07:00
ssb
staging backlight: Allow properties to be passed at registration 2010-03-16 19:47:54 +00:00
tc
telephony
thermal
uio UIO: Remove SMX Cryptengine driver 2010-03-07 17:04:51 -08:00
usb Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6 2010-03-19 13:40:03 -07:00
uwb Merge branch 'for-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/dvrabel/uwb 2010-03-19 18:14:22 -07:00
vhost vhost-net: restart tx poll on sk_sndbuf full 2010-02-28 19:50:33 +02:00
video Merge master.kernel.org:/home/rmk/linux-2.6-arm 2010-03-18 16:59:10 -07:00
virtio virtio: set pci bus master enable bit 2010-03-02 13:41:14 +02:00
vlynq
w1 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2010-03-12 16:04:50 -08:00
watchdog [WATCHDOG] i6300esb.c: change platform_driver to pci_driver 2010-03-08 13:48:01 +00:00
xen Driver core: Constify struct sysfs_ops in struct kobj_type 2010-03-07 17:04:49 -08:00
zorro
Kconfig MFGPT: move clocksource menu 2010-03-06 11:26:28 -08:00
Makefile Merge branch 'origin' into devel-stable 2010-03-08 20:21:04 +00:00