Michael S. Tsirkin ec56dc0b7f IPoIB/cm: Fix performance regression on Mellanox ... commit 518b1646 ("IPoIB/cm: Fix SRQ WR leak") introduced a severe performance regression on Mellanox cards, because keeping a QP in the error state for extended periods of time moves hardware to the slow path (until the QP is destroyed). For example, MPI latency goes from ~3 usecs to ~7 usecs. Fix this by posting a send WR on one of the QPs that are being flushed, instead of using a separate drain QP that is kept in the error state. This fixes bug <https://bugs.openfabrics.org/show_bug.cgi?id=636>, reported and bisected by Scott Weitzenkamp at Cisco and debugged by Sasha Mikheev at Voltaire. Signed-off-by: Michael S. Tsirkin <mst@dev.mellanox.co.il> Signed-off-by: Roland Dreier <rolandd@cisco.com>		2007-05-29 16:07:09 -07:00
..
acorn
acpi
amba
ata	pata_hpt37x: Further improvements based on the IDE updates and vendor drivers	2007-05-25 17:29:59 -04:00
atm	[ATM]: Use mutex instead of binary semaphore in idt77252 driver.	2007-05-24 16:36:45 -07:00
auxdisplay
base
block
bluetooth
cdrom
char	[SPARC]: Mark as emulating cmpxchg, add appropriate depends for DRM.	2007-05-29 02:51:24 -07:00
clocksource
connector
cpufreq
crypto
dio
dma
edac
eisa
fc4
firewire	firewire: fix return code	2007-05-27 23:21:01 +02:00
firmware
hid
hwmon	hwmon/applesmc: Handle name file creation error and deletion	2007-05-27 22:17:43 +02:00
i2c
ide
ieee1394	ieee1394: raw1394: Fix async send	2007-05-27 23:21:00 +02:00
infiniband	IPoIB/cm: Fix performance regression on Mellanox	2007-05-29 16:07:09 -07:00
input
isdn
kvm
leds
macintosh	Merge branch 'for_paulus' of master.kernel.org:/pub/scm/linux/kernel/git/galak/powerpc	2007-05-29 13:42:28 -07:00
mca
md
media
message	Merge master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6	2007-05-29 13:39:52 -07:00
mfd
misc
mmc
mtd
net	Merge branch 'for_paulus' of master.kernel.org:/pub/scm/linux/kernel/git/galak/powerpc	2007-05-29 13:42:28 -07:00
nubus
oprofile
parisc
parport
pci
pcmcia
pnp	[S390] Kconfig: menus with depends on HAS_IOMEM.	2007-05-10 15:46:07 +02:00
ps3
rapidio
rtc
s390
sbus
scsi	Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6	2007-05-29 14:03:42 -07:00
serial	[SPARC]: Linux always started with 9600 8N1	2007-05-29 02:50:07 -07:00
sh
sn
spi
tc
telephony
usb	USB: replace flush_workqueue with cancel_sync_work	2007-05-29 13:39:07 -07:00
video
w1
zorro
Kconfig
Makefile	Merge branch 'juju' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6	2007-05-10 13:30:08 -07:00