linux-next

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History

Andrew Morton 7a8ef1cb77 [PATCH] x86: don't initialise cpu_possible_map to all ones

Initialising cpu_possible_map to all-ones with CONFIG_HOTPLUG_CPU means that

a) All for_each_cpu() loops will iterate across all NR_CPUS CPUs, rather
   than over possible ones.  That can be quite expensive.

b) Soon we'll be allocating per-cpu areas only for possible CPUs.  So with
   CPU_MASK_ALL, we'll be wasting memory.

I also switched voyager over to not use CPU_MASK_ALL in the non-CPU-hotplug
case.  Should be OK..

I note that parisc is also using CPU_MASK_ALL.  Suggest that it stop doing
that.

Cc: James Bottomley <James.Bottomley@steeleye.com>
Cc: Kyle McMartin <kyle@mcmartin.ca>
Cc: Paul Jackson <pj@sgi.com>
Cc: Ashok Raj <ashok.raj@intel.com>
Cc: Zwane Mwaikambo <zwane@linuxpower.ca>
Cc: Paul Jackson <pj@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

2006-02-10 08:13:12 -08:00

alpha

[PATCH] alpha: set cpu_possible_map much earlier

2006-02-08 07:57:37 -08:00

arm

Merge master.kernel.org:/home/rmk/linux-2.6-serial

2006-02-08 15:21:22 -08:00

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