linux/arch
Muli Ben-Yehuda 820a149705 x86_64: Calgary - tighten up the bitmap locking
Currently the IOMMU table's lock protects both the bitmap and access
to the hardware's TCE table. Access to the TCE table is synchronized
through the bitmap; therefore, only hold the lock while modifying the
bitmap. This gives a yummy 10-15% reduction in CPU utilization for
netperf on a large SMP machine.

Signed-off-by: Muli Ben-Yehuda <muli@il.ibm.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-21 18:37:11 -07:00
..
alpha some kmalloc/memset ->kzalloc (tree wide) 2007-07-19 10:04:50 -07:00
arm clockevents: fix resume logic 2007-07-21 17:49:15 -07:00
arm26 mm: Remove slab destructors from kmem_cache_create(). 2007-07-20 10:11:58 +09:00
avr32 mm: fault feedback #2 2007-07-19 10:04:41 -07:00
blackfin some kmalloc/memset ->kzalloc (tree wide) 2007-07-19 10:04:50 -07:00
cris Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild 2007-07-19 14:28:19 -07:00
frv FRV: work around a possible compiler bug 2007-07-19 10:04:50 -07:00
h8300 PTRACE_POKEDATA consolidation 2007-07-17 10:23:03 -07:00
i386 x86: remove support for the Rise CPU 2007-07-21 18:37:10 -07:00
ia64 revert "PIE randomization" 2007-07-21 17:49:14 -07:00
m32r Merge branch 'release' of git://lm-sensors.org/kernel/mhoffman/hwmon-2.6 2007-07-19 14:24:57 -07:00
m68k m68k: exclude more unbuildable drivers 2007-07-20 08:24:49 -07:00
m68knommu m68knommu: reformat show_cpuinfo() 2007-07-20 08:44:20 -07:00
mips [MIPS] User stack pointer randomisation 2007-07-20 18:57:40 +01:00
parisc define new percpu interface for shared data 2007-07-19 10:04:44 -07:00
powerpc spufs: make signal-notification files readonly for NOSCHED contexts 2007-07-21 17:49:16 -07:00
ppc Merge branch 'release' of git://lm-sensors.org/kernel/mhoffman/hwmon-2.6 2007-07-19 14:24:57 -07:00
s390 s390: Put allocated ELF notes in read-only data segment 2007-07-19 10:04:47 -07:00
sh clockevents: fix resume logic 2007-07-21 17:49:15 -07:00
sh64 sh64: Flag sh64_get_page() as __init_refok. 2007-07-20 17:46:42 +09:00
sparc [SPARC]: Make sure dev_archdata is filled in for all devices. 2007-07-20 17:13:42 -07:00
sparc64 NTP: move the cmos update code into ntp.c 2007-07-21 17:49:15 -07:00
um fallout from kbuild changes 2007-07-19 18:37:54 -07:00
v850 PTRACE_POKEDATA consolidation 2007-07-17 10:23:03 -07:00
x86_64 x86_64: Calgary - tighten up the bitmap locking 2007-07-21 18:37:11 -07:00
xtensa Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild 2007-07-19 14:28:19 -07:00