Mike Marciniszyn 551ace124d IB/qib: Reduce sdma_lock contention ... Profiling has shown that sdma_lock is proving a bottleneck for performance. The situations include: - RDMA reads when krcvqs > 1 - post sends from multiple threads For RDMA read the current global qib_wq mechanism runs on all CPUs and contends for the sdma_lock when multiple RMDA read requests are fielded on differenct CPUs. For post sends, the direct call to qib_do_send() from multiple threads causes the contention. Since the sdma mechanism is per port, this fix converts the existing workqueue to a per port single thread workqueue to reduce the lock contention in the RDMA read case, and for any other case where the QP is scheduled via the workqueue mechanism from more than 1 CPU. For the post send case, This patch modifies the post send code to test for a non empty sdma engine. If the sdma is not idle the (now single thread) workqueue will be used to trigger the send engine instead of the direct call to qib_do_send(). Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com> Signed-off-by: Roland Dreier <roland@purestorage.com>		2012-07-19 11:19:58 -07:00
..
accessibility
acpi	Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux	2012-06-30 11:11:58 -07:00
amba	arm-soc: driver specific updates	2012-05-26 12:22:27 -07:00
ata	Viresh has moved	2012-06-20 14:39:36 -07:00
atm	solos-pci: Fix DMA support	2012-05-24 16:22:53 -04:00
auxdisplay
base	PM / Sleep: Prevent waiting forever on asynchronous suspend after abort	2012-06-24 23:31:09 +02:00
bcma	bcma: fix null pointer in bcma_core_pci_irq_ctl	2012-06-08 13:47:07 -04:00
block	mtip32xx: Changes to sysfs entries	2012-05-31 08:46:50 +02:00
bluetooth	Bluetooth: btmrvl: Do not send vendor events to bluetooth stack	2012-06-19 00:19:11 -03:00
cdrom
char	Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6	2012-06-18 12:20:36 -07:00
clk	clk: mxs: fix clock lookup after freeing init memory	2012-06-25 16:51:48 -07:00
clocksource	clocksource: sh_tmu: Use clockevents_config_and_register().	2012-06-11 17:10:16 +09:00
connector
cpufreq
cpuidle
crypto	arm-soc: clock driver changes	2012-05-26 12:42:29 -07:00
dca
devfreq	Power management updates for 3.5	2012-05-23 14:07:06 -07:00
dio
dma	Merge branch 'fixes' of git://git.infradead.org/users/vkoul/slave-dma	2012-06-20 22:12:52 -07:00
edac	edac: Do alignment logic properly in edac_align_ptr()	2012-06-11 12:43:16 -03:00
eisa
extcon	extcon: max8997: Add missing kfree for info->edev in max8997_muic_remove()	2012-06-18 16:30:42 -07:00
firewire	IEEE 1394 (FireWire) subsystem updates post v3.4:	2012-05-24 12:57:47 -07:00
firmware
gpio	gpio/samsung: fix the typo 'exynos5_xxx' instead of 'exonys5_xxx'	2012-06-03 21:21:01 -07:00
gpu	Merge branch 'drm-intel-fixes' of git://people.freedesktop.org/~danvet/drm-intel into drm-fixes	2012-06-27 19:56:20 +01:00
hid	Merge branch 'upstream-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid	2012-06-26 11:23:41 -07:00
hsi
hv	Driver core pull for 3.5-rc1	2012-05-22 16:02:13 -07:00
hwmon	Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2012-06-29 10:29:54 -07:00
hwspinlock
i2c	i2c: Add generic I2C multiplexer using pinctrl API	2012-06-04 16:49:43 +02:00
ide	drivers/ide/ide-cs.c: adjust suspicious bit operation	2012-06-12 15:51:41 -07:00
idle
ieee802154
iio	iio: drop wrong reference from Kconfig	2012-06-14 17:28:46 -07:00
infiniband	IB/qib: Reduce sdma_lock contention	2012-07-19 11:19:58 -07:00
input	i2c: Split I2C_M_NOSTART support out of I2C_FUNC_PROTOCOL_MANGLING	2012-05-30 10:55:34 +02:00
iommu	iommu/amd: Fix deadlock in ppr-handling error path	2012-06-04 12:47:44 +02:00
isdn	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2012-05-24 11:54:29 -07:00
leds	leds: Make LEDS_ASIC3 and LEDS_RENESAS_TPU depend on LEDS_CLASS=y	2012-06-12 10:56:25 +08:00
lguest
macintosh
md	md: 2 fixes for 3.5-rc	2012-06-06 09:49:28 -07:00
media	Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media	2012-06-25 14:53:09 -07:00
memory
memstick
message	Merge branch 'akpm' (Andrew's patch-bomb)	2012-05-31 18:10:18 -07:00
mfd	Viresh has moved	2012-06-20 14:39:36 -07:00
misc	misc: mei: set WDIOF_ALARMONLY on mei watchdog	2012-06-13 15:34:31 -07:00
mmc	Revert "mmc: omap_hsmmc: Enable Auto CMD12"	2012-06-26 16:10:30 -04:00
mtd	Fix the debugfs regression - we never enable it because incorrect	2012-06-28 11:41:43 -07:00
net	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2012-06-28 11:20:31 -07:00
nfc	NFC: potential integer overflow problem in check_crc()	2012-05-25 11:16:16 -04:00
nubus
of	Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus	2012-05-29 18:27:19 -07:00
oprofile	oprofile: perf: use NR_CPUS instead or nr_cpumask_bits for static array	2012-06-21 16:15:11 +02:00
parisc	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2012-05-22 19:22:50 -07:00
parport	Driver core pull for 3.5-rc1	2012-05-22 16:02:13 -07:00
pci	USB: add NO_D3_DURING_SLEEP flag and revert 151b612847	2012-06-13 13:11:39 -07:00
pcmcia
pinctrl	Merge branch 'akpm' (Andrew's patch-bomb)	2012-06-20 14:41:57 -07:00
platform	drivers/platform/x86/acerhdf.c: correct Boris' mail address	2012-06-07 14:43:55 -07:00
pnp
power	A bunch of fixes for v3.5, nothing extraordinary.	2012-05-31 12:10:15 -07:00
pps
ps3
ptp	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2012-05-22 19:22:50 -07:00
rapidio	rapidio/tsi721: add DMA engine support	2012-05-31 17:49:31 -07:00
regulator	regulator: palmas: fix regmap offsets for enable/disable	2012-06-23 11:37:28 +01:00
remoteproc	remoteproc/omap: fix dev_err typo	2012-06-17 10:31:03 +03:00
rpmsg
rtc	Merge branches 'bugfix-battery', 'bugfix-misc', 'bugfix-rafael', 'bugfix-turbostat', 'bugfix-video' and 'workaround-pss' into release	2012-06-04 00:48:41 -04:00
s390	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux	2012-05-31 10:51:10 -07:00
sbus
scsi	SCSI & usb-storage: add try_rc_10_first flag	2012-06-22 22:05:31 -07:00
sfi
sh	sh: intc: Kill off special reservation interface.	2012-05-22 19:07:55 +09:00
sn
spi	SPI: fix over-eager devm_xxx() conversion	2012-06-18 11:27:04 +01:00
ssb
staging	Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media	2012-06-25 14:53:09 -07:00
target	target: Return error to initiator if SET TARGET PORT GROUPS emulation fails	2012-06-12 20:12:25 -07:00
tc
thermal
tty	Serial driver fixes for 3.5-rc4	2012-06-20 15:13:13 -07:00
uio
usb	USB: CP210x Add 10 Device IDs	2012-06-26 16:14:34 -07:00
uwb
vhost	vhost: use USER_DS in vhost_worker thread	2012-06-26 21:10:56 -07:00
video	fbdev fixes for 3.5	2012-06-16 16:59:05 -07:00
virt
virtio	virtio-mmio: Devices parameter parsing	2012-05-22 12:16:15 +09:30
vlynq
vme
w1	arm-soc: clock driver changes	2012-05-26 12:42:29 -07:00
watchdog	watchdog: core: fix WDIOC_GETSTATUS return value	2012-06-28 20:40:56 +02:00
xen	Five bug-fixes:	2012-06-15 17:17:15 -07:00
zorro
Kconfig	Staging tree pull request for 3.5-rc1	2012-05-22 16:34:21 -07:00
Makefile	arm-soc: driver specific updates	2012-05-26 12:22:27 -07:00