linux/arch
de Dinechin, Christophe (Integrity VM) aec103bfa6 [IA64] Avoid unnecessary TLB flushes when allocating memory
Improve performance of memory allocations on ia64 by avoiding a global TLB
purge to purge a single page from the file cache. This happens whenever we
evict a page from the buffer cache to make room for some other allocation.

Test case: Run 'find /usr -type f | xargs cat > /dev/null' in the
background to fill the buffer cache, then run something that uses memory,
e.g. 'gmake -j50 install'. Instrumentation showed that the number of
global TLB purges went from a few millions down to about 170 over a 12
hours run of the above.

The performance impact is particularly noticeable under virtualization,
because a virtual TLB is generally both larger and slower to purge than
a physical one.

Signed-off-by: Christophe de Dinechin <ddd@hp.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2007-12-18 16:56:50 -08:00
..
alpha alpha: build fixes 2007-12-17 19:28:16 -08:00
arm [ARM] 4694/1: IXP4xx: Update clockevent support for shutdown and resume 2007-12-17 17:18:01 +00:00
avr32 [AVR32] Fix wrong pt_regs in critical exception handler 2007-12-07 14:54:48 +01:00
blackfin Blackfin arch: fix bug when enable uart1 with uart0 disabled => no initial console 2007-11-21 17:04:41 +08:00
cris ide: move CONFIG_IDE_ETRAX to drivers/ide/Kconfig 2007-11-27 21:35:55 +01:00
frv FRV: arrange things such that BRA can reach from the trap table 2007-11-29 09:24:54 -08:00
h8300 Kbuild/doc: fix links to Documentation files 2007-10-30 14:26:30 -07:00
ia64 [IA64] Avoid unnecessary TLB flushes when allocating memory 2007-12-18 16:56:50 -08:00
m32r m32r: Update sys_rt_sigsuspend 2007-11-28 01:24:04 +09:00
m68k m68k: export atari_keyb_init 2007-11-26 19:15:31 -08:00
m68knommu m68knommu: mark mem init functions as __init 2007-10-23 20:45:44 -07:00
mips [MIPS] Ensure that ST0_FR is never set on a 32 bit kernel 2007-12-14 17:34:30 +00:00
parisc [PARISC] print more than one character at a time for pdc console 2007-12-06 09:32:15 -08:00
powerpc Merge branch 'for-2.6.24' of master.kernel.org:/pub/scm/linux/kernel/git/galak/powerpc into merge 2007-12-14 16:46:50 +11:00
ppc [POWERPC] virtex bug fix: Use canonical value for AC97 interrupt xparams 2007-12-07 11:43:55 +11:00
s390 [S390] Make sure the restore psw masks are initialized. 2007-12-04 16:09:58 +01:00
sh sh: Support PCI IO access of SH7780 base boards. 2007-11-30 12:36:13 +09:00
sh64 sh64: Kill off duplicate includes. 2007-11-05 12:18:17 +09:00
sparc [SPARC]: Add missing of_node_put 2007-12-05 05:38:00 -08:00
sparc64 [SPARC64]: Fix two kernel linear mapping setup bugs. 2007-12-13 06:13:38 -08:00
um uml: stop gdb from deleting breakpoints when running UML 2007-12-17 19:28:15 -08:00
v850 spelling fixes: arch/v850/ 2007-10-20 01:24:05 +02:00
x86 revert "Hibernation: Use temporary page tables for kernel text mapping on x86_64" 2007-12-17 19:28:15 -08:00
xtensa [XTENSA]: Fix use of skb after netif_rx 2007-12-11 02:45:28 -08:00