]> git.baikalelectronics.ru Git - kernel.git/commit
mm: convert mm->cpu_vm_cpumask into cpumask_var_t
authorKOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Wed, 25 May 2011 00:12:15 +0000 (17:12 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Wed, 25 May 2011 15:39:21 +0000 (08:39 -0700)
commit6dfcc064b7be27c6e52143f24646d1ad85492db4
treee2b035234440bcd1aa88078c3f9c8457d461ef9c
parentd9bea12ab4005baff3a9a9e3474c1feef68530fa
mm: convert mm->cpu_vm_cpumask into cpumask_var_t

cpumask_t is very big struct and cpu_vm_mask is placed wrong position.
It might lead to reduce cache hit ratio.

This patch has two change.
1) Move the place of cpumask into last of mm_struct. Because usually cpumask
   is accessed only front bits when the system has cpu-hotplug capability
2) Convert cpu_vm_mask into cpumask_var_t. It may help to reduce memory
   footprint if cpumask_size() will use nr_cpumask_bits properly in future.

In addition, this patch change the name of cpu_vm_mask with cpu_vm_mask_var.
It may help to detect out of tree cpu_vm_mask users.

This patch has no functional change.

[akpm@linux-foundation.org: build fix]
[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Koichi Yasutake <yasutake.koichi@jp.panasonic.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Documentation/cachetlb.txt
arch/x86/kernel/tboot.c
include/linux/mm_types.h
include/linux/sched.h
init/main.c
kernel/fork.c
mm/init-mm.c