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linux/arch/i386/mach-voyager
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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
..
Makefile Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
setup.c [PATCH] useless includes of linux/irq.h in arch/i386 2005-09-26 18:29:50 -07:00
voyager_basic.c [PATCH] useless includes of linux/irq.h in arch/i386 2005-09-26 18:29:50 -07:00
voyager_cat.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
voyager_smp.c [PATCH] x86: don't initialise cpu_possible_map to all ones 2006-02-10 08:13:12 -08:00
voyager_thread.c [PATCH] useless includes of linux/irq.h in arch/i386 2005-09-26 18:29:50 -07:00