linux/arch/sparc
Tejun Heo 2f39e637ea percpu: allow non-linear / sparse cpu -> unit mapping
Currently cpu and unit are always identity mapped.  To allow more
efficient large page support on NUMA and lazy allocation for possible
but offline cpus, cpu -> unit mapping needs to be non-linear and/or
sparse.  This can be easily implemented by adding a cpu -> unit
mapping array and using it whenever looking up the matching unit for a
cpu.

The only unusal conversion is in pcpu_chunk_addr_search().  The passed
in address is unit0 based and unit0 might not be in use so it needs to
be converted to address of an in-use unit.  This is easily done by
adding the unit offset for the current processor.

[ Impact: allows non-linear/sparse cpu -> unit mapping, no visible change yet ]

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: David Miller <davem@davemloft.net>
2009-07-04 08:11:00 +09:00
..
boot sparc32: Fix makefile not generating required files 2009-06-25 19:56:02 -07:00
configs sparc64: Update defconfig. 2009-06-16 04:59:53 -07:00
include/asm Delete pcibios_select_root 2009-06-17 14:04:42 -07:00
kernel percpu: allow non-linear / sparse cpu -> unit mapping 2009-07-04 08:11:00 +09:00
lib sparc64: Fix section attribute warnings. 2009-05-29 16:12:02 -07:00
math-emu sparc64: unify math-emu 2008-12-04 09:16:56 -08:00
mm Move FAULT_FLAG_xyz into handle_mm_fault() callers 2009-06-21 13:08:22 -07:00
oprofile sparc64: Implement NMI watchdog on capable cpus. 2009-01-30 00:03:53 -08:00
prom sparc: Eliminate PROMLIB_INTERNAL as it does nothing 2009-01-08 16:59:01 -08:00
Kconfig sparc64: fix build breakage introduced by percpu-convert-most patchset 2009-06-24 18:03:36 +09:00
Kconfig.debug generic debug pagealloc: build fix 2009-04-02 19:04:48 -07:00
Makefile sparc: unify kernel/init_task 2008-12-04 13:28:09 -08:00