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authorChristoph Lameter <clameter@sgi.com>2008-02-04 22:29:22 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-05 09:44:18 -0800
commit9eccf2a816ed0aad82b577de6a40cd098ad41944 (patch)
tree28d971fbb701d545b54f9f5fdf71c12940d2b8df
parent7766755a2f249e7e0dabc5255a0a3d151ff79821 (diff)
vmstat: remove prefetch
Remove the prefetch logic in order to avoid touching impossible per cpu areas. Signed-off-by: Christoph Lameter <clameter@sgi.com> Cc: Mike Travis <travis@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--mm/vmstat.c11
1 files changed, 2 insertions, 9 deletions
diff --git a/mm/vmstat.c b/mm/vmstat.c
index 888668e0b7db..422d960ffcd8 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -21,21 +21,14 @@ EXPORT_PER_CPU_SYMBOL(vm_event_states);
static void sum_vm_events(unsigned long *ret, cpumask_t *cpumask)
{
- int cpu = 0;
+ int cpu;
int i;
memset(ret, 0, NR_VM_EVENT_ITEMS * sizeof(unsigned long));
- cpu = first_cpu(*cpumask);
- while (cpu < NR_CPUS) {
+ for_each_cpu_mask(cpu, *cpumask) {
struct vm_event_state *this = &per_cpu(vm_event_states, cpu);
- cpu = next_cpu(cpu, *cpumask);
-
- if (cpu < NR_CPUS)
- prefetch(&per_cpu(vm_event_states, cpu));
-
-
for (i = 0; i < NR_VM_EVENT_ITEMS; i++)
ret[i] += this->event[i];
}

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