linux/arch/s390
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
..
appldata
boot
crypto [PATCH] s390: sha256 crypto code fix 2006-01-14 18:27:08 -08:00
kernel [PATCH] s390: fstatat64 support 2006-02-12 10:11:58 -08:00
lib [PATCH] s390: fix __delay implementation 2006-02-14 16:09:35 -08:00
math-emu
mm [PATCH] cmm NULL noise removal, __user annotations 2006-02-07 20:58:15 -05:00
oprofile
defconfig [PATCH] s390: update default configuration 2006-02-11 21:41:12 -08:00
Kconfig [PATCH] Introduce CONFIG_DEFAULT_MIGRATION_COST 2006-02-17 13:59:26 -08:00
Kconfig.debug
Makefile