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linux/drivers
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Akinobu Mita d7be003a9d cma: make default CMA area size zero for x86 
This makes CMA memory area size zero for x86 in default configuration
(doesn't change on the other architectures).  If default CMA size is
zero, DMA_CMA is disabled.  It can be enabled by passing cma= to the
kernel.

This makes less impact on x86.  Because there is no mainline driver that
requires it for x86, and Peter Hurley reported the performance
regression, as this is trying to drive _all_ dma mapping allocations
through a _very_ small window.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Reported-by: Peter Hurley <peter@hurleysoftware.com>
Cc: Peter Hurley <peter@hurleysoftware.com>
Cc: Chuck Ebbert <cebbert.lkml@gmail.com>
Cc: Jean Delvare <jdelvare@suse.de>
Acked-by: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Don Dutile <ddutile@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-12-10 17:41:06 -08:00
..
accessibility
acpi ACPI / video: update condition to check if device is in _DOD list 2014-12-01 02:09:18 +01:00
amba ARM: tegra: Move AHB Kconfig to drivers/amba 2014-11-26 09:43:25 +01:00
ata SCSI for-linus on 20141208 2014-12-08 21:19:19 -08:00
atm solos-pci: fix error return code 2014-11-23 14:29:44 -05:00
auxdisplay
base cma: make default CMA area size zero for x86 2014-12-10 17:41:06 -08:00
bcma bcma: add another PCI ID of device with BCM43228 2014-10-23 14:02:06 -04:00
block Merge remote-tracking branch 'scsi-queue/core-for-3.19' into for-linus 2014-12-08 07:40:20 -08:00
bluetooth
bus ARM: SoC driver updates for 3.19 2014-12-09 14:48:22 -08:00
cdrom
char asm-generic: asm/io.h rewrite 2014-12-09 17:25:00 -08:00
clk ARM: SoC driver updates for 3.19 2014-12-09 14:48:22 -08:00
clocksource Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-12-10 08:18:32 -08:00
connector
cpufreq cpufreq: Avoid crash in resume on SMP without OPP 2014-11-08 02:10:04 +01:00
cpuidle Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2014-10-24 12:48:47 -07:00
crypto crypto: caam - fix missing dma unmap on error path 2014-11-06 23:10:20 +08:00
dca
devfreq
dio
dma Merge branch 'fixes' of git://git.infradead.org/users/vkoul/slave-dma 2014-11-21 16:24:27 -08:00
dma-buf
edac EDAC updates all over the place: 2014-12-08 20:17:49 -08:00
eisa
extcon
firewire firewire: cdev: prevent kernel stack leaking into ioctl arguments 2014-11-14 12:10:13 +01:00
firmware efi: efi-stub: notify on DTB absence 2014-11-05 09:03:34 +01:00
fmc
gpio mfd: tc3589x: get rid of static base 2014-11-25 16:18:56 +00:00
gpu Merge tag 'drm-intel-fixes-2014-12-04' of git://anongit.freedesktop.org/drm-intel into drm-fixes 2014-12-05 11:12:29 +10:00
hid Hi Linus, 2014-12-08 20:02:54 -08:00
hsi
hv
hwmon hwmon: (tmp401) Detect TMP435 on all addresses it supports 2014-12-08 06:48:37 -08:00
hwspinlock
i2c Hi Linus, 2014-12-08 20:02:54 -08:00
ide
idle
iio Hi Linus, 2014-12-08 20:02:54 -08:00
infiniband Merge remote-tracking branch 'scsi-queue/drivers-for-3.19' into for-linus 2014-12-08 07:42:25 -08:00
input drivers/input/evdev.c: don't kfree() a vmalloc address 2014-12-03 09:35:38 -08:00
iommu Merge branch 'irq-irqdomain-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-12-10 09:01:01 -08:00
ipack
irqchip Merge branch 'irq-irqdomain-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-12-10 09:01:01 -08:00
isdn
leds Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds 2014-10-21 08:18:38 -07:00
lguest
macintosh
mailbox Merge branch 'mailbox-for-linus' of git://git.linaro.org/landing-teams/working/fujitsu/integration 2014-10-21 11:21:19 -07:00
mcb
md - Significant DM thin-provisioning performance improvements to meet 2014-12-08 21:10:03 -08:00
media [media] rc-core: fix toggle handling in the rc6 decoder 2014-11-21 15:57:47 -02:00
memory ARM: SoC/OMAP GPMC driver cleanup and move for 3.19 2014-12-09 16:57:56 -08:00
memstick
message scsi: drop reason argument from ->change_queue_depth 2014-11-24 14:45:27 +01:00
mfd Hi Linus, 2014-12-08 20:02:54 -08:00
misc ARM: SoC cleanups for 3.19 2014-12-09 14:18:35 -08:00
mmc mmc: sdhci-msm: Convert to mmc_send_tuning() 2014-12-08 09:21:06 +01:00
mtd Three main MTD fixes for 3.18: 2014-11-02 14:45:52 -08:00
net ARM: SoC cleanup on mach-at91 for 3.19 2014-12-09 14:17:12 -08:00
nfc
ntb
nubus nubus: Remove superfluous interrupt disable/restore 2014-10-27 11:03:19 +01:00
of Merge branch 'irq-irqdomain-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-12-10 09:01:01 -08:00
oprofile
parisc
parport
pci Merge branch 'irq-irqdomain-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-12-10 09:01:01 -08:00
pcmcia
phy phy: omap-usb2: Enable runtime PM of omap-usb2 phy properly 2014-11-05 14:34:06 -08:00
pinctrl pinctrl: baytrail: show output gpio state correctly on Intel Baytrail 2014-10-28 11:16:26 +01:00
platform platform: hp_accel: Add SERIO_I8042 as a dependency since it now includes i8042.h/serio.h 2014-11-10 21:16:15 -08:00
pnp
power ARM: SoC platform changes for 3.19 2014-12-09 14:38:28 -08:00
powercap
pps
ps3
ptp
pwm pwm: Changes for v3.18-rc1 2014-10-21 08:17:43 -07:00
rapidio
ras
regulator regulator: Updates for v3.19 2014-12-08 20:42:41 -08:00
remoteproc
reset Reset controller changes for v3.19 2014-12-04 16:57:36 +01:00
rpmsg
rtc Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-12-10 08:18:32 -08:00
s390 Merge remote-tracking branch 'scsi-queue/drivers-for-3.19' into for-linus 2014-12-08 07:42:25 -08:00
sbus
scsi Merge remote-tracking branch 'scsi-queue/drivers-for-3.19' into for-linus 2014-12-08 07:42:25 -08:00
sfi
sh
sn
soc ARM: SoC driver updates for 3.19 2014-12-09 14:48:22 -08:00
spi Merge remote-tracking branches 'spi/fix/dw' and 'spi/fix/sirf' into spi-linus 2014-11-26 19:05:25 +00:00
spmi
ssb
staging ARM: SoC DT updates for 3.19 2014-12-09 14:57:37 -08:00
target Merge remote-tracking branch 'scsi-queue/drivers-for-3.19' into for-linus 2014-12-08 07:42:25 -08:00
tc
thermal thermal: Exynos: Deletion of unnecessary checks before two function calls 2014-11-21 15:20:17 -04:00
thunderbolt
tty Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-12-09 21:21:34 -08:00
uio
usb Merge remote-tracking branch 'scsi-queue/drivers-for-3.19' into for-linus 2014-12-08 07:42:25 -08:00
uwb
vfio PCI/MSI: Rename write_msi_msg() to pci_write_msi_msg() 2014-11-23 13:01:45 +01:00
vhost vhost-scsi: Take configfs group dependency during VHOST_SCSI_SET_ENDPOINT 2014-10-28 13:54:16 -07:00
video ARM: SoC cleanup on mach-at91 for 3.19 2014-12-09 14:17:12 -08:00
virt
virtio
vlynq
vme
w1 w1: omap-hdq: support device probing with device-tree 2014-11-10 15:58:47 -08:00
watchdog Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-12-10 08:18:32 -08:00
xen arm64 updates for 3.19 2014-12-09 13:12:47 -08:00
zorro
Kconfig ARM: tegra: Move AHB Kconfig to drivers/amba 2014-11-26 09:43:25 +01:00
Makefile