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Ingo Molnar 4bbf39c29b [PATCH] Introduce CONFIG_DEFAULT_MIGRATION_COST 
Heiko Carstens <heiko.carstens@de.ibm.com> wrote:

  The boot sequence on s390 sometimes takes ages and we spend a very long
  time (up to one or two minutes) in calibrate_migration_costs.  The time
  spent there differs from boot to boot.  Also the calculated costs differ
  a lot.  I've seen differences by up to a factor of 15 (yes, factor not
  percent).  Also I doubt that making these measurements make much sense on
  a completely virtualized architecture where you cannot tell how much cpu
  time you will get anyway.

So introduce the CONFIG_DEFAULT_MIGRATION_COST method for an architecture
to set the scheduler migration costs.  This turns off automatic detection
of migration costs.  Makes sense on virtual platforms, where migration
costs are hard to measure accurately.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-02-17 13:59:26 -08:00
..
alpha [PATCH] alpha: set cpu_possible_map much earlier 2006-02-08 07:57:37 -08:00
arm [ARM] 3338/1: old ABI compat: sys_socketcall 2006-02-16 22:36:13 +00:00
arm26 [PATCH] arm26: select BLK_DEV_FD only on A5K 2006-02-01 08:53:22 -08:00
cris [PATCH] fallout from ptrace consolidation patch: cris/arch-v10 2006-02-07 20:57:19 -05:00
frv [PATCH] FRV: Use virtual interrupt disablement 2006-02-14 16:09:35 -08:00
h8300 [PATCH] hrtimer: round up relative start time on low-res arches 2006-02-14 16:09:35 -08:00
i386 [PATCH] x86_64: Add boot option to disable randomized mappings and cleanup 2006-02-17 08:00:40 -08:00
ia64 [IA64] Count disabled cpus as potential hot-pluggable CPUs 2006-02-16 14:10:50 -08:00
m32r [PATCH] drive_info removal outside of arch/i386 2006-02-07 20:56:47 -05:00
m68k [PATCH] hrtimer: round up relative start time on low-res arches 2006-02-14 16:09:35 -08:00
m68knommu [PATCH] hrtimer: round up relative start time on low-res arches 2006-02-14 16:09:35 -08:00
mips [MIPS] Fix typo in _sys32_rt_sigreturn and _sysn32_rt_sigreturn. 2006-02-14 19:13:26 +00:00
parisc [PATCH] hrtimer: round up relative start time on low-res arches 2006-02-14 16:09:35 -08:00
powerpc Merge git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc-merge 2006-02-10 14:52:31 -08:00
ppc ppc: Use the system call table from arch/powerpc/kernel/systbl.S 2006-02-10 16:02:20 +11:00
s390 [PATCH] Introduce CONFIG_DEFAULT_MIGRATION_COST 2006-02-17 13:59:26 -08:00
sh [PATCH] arch/sh/Kconfig: fix the ISA_DMA_API dependencies 2006-02-17 13:59:26 -08:00
sh64 [PATCH] drive_info removal outside of arch/i386 2006-02-07 20:56:47 -05:00
sparc [SPARC]: sys_newfstatat --> sys_fstatat64 2006-02-12 23:30:11 -08:00
sparc64 [SPARC]: sys_newfstatat --> sys_fstatat64 2006-02-12 23:30:11 -08:00
um [PATCH] uml: remove a dead file 2006-02-07 16:12:32 -08:00
v850 [PATCH] hrtimer: round up relative start time on low-res arches 2006-02-14 16:09:35 -08:00
x86_64 [PATCH] x86_64: Always pass full number of nodes to NUMA hash computation 2006-02-17 08:00:41 -08:00
xtensa [PATCH] Fix some ucLinux breakage from the tty updates 2006-02-03 08:32:04 -08:00