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authorChristoph Lameter <clameter@sgi.com>2008-02-05 01:29:22 -0500
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-05 12:44:18 -0500
commit9eccf2a816ed0aad82b577de6a40cd098ad41944 (patch)
tree28d971fbb701d545b54f9f5fdf71c12940d2b8df /mm/vmstat.c
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>
Diffstat (limited to 'mm/vmstat.c')
-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);
21 21
22static void sum_vm_events(unsigned long *ret, cpumask_t *cpumask) 22static void sum_vm_events(unsigned long *ret, cpumask_t *cpumask)
23{ 23{
24 int cpu = 0; 24 int cpu;
25 int i; 25 int i;
26 26
27 memset(ret, 0, NR_VM_EVENT_ITEMS * sizeof(unsigned long)); 27 memset(ret, 0, NR_VM_EVENT_ITEMS * sizeof(unsigned long));
28 28
29 cpu = first_cpu(*cpumask); 29 for_each_cpu_mask(cpu, *cpumask) {
30 while (cpu < NR_CPUS) {
31 struct vm_event_state *this = &per_cpu(vm_event_states, cpu); 30 struct vm_event_state *this = &per_cpu(vm_event_states, cpu);
32 31
33 cpu = next_cpu(cpu, *cpumask);
34
35 if (cpu < NR_CPUS)
36 prefetch(&per_cpu(vm_event_states, cpu));
37
38
39 for (i = 0; i < NR_VM_EVENT_ITEMS; i++) 32 for (i = 0; i < NR_VM_EVENT_ITEMS; i++)
40 ret[i] += this->event[i]; 33 ret[i] += this->event[i];
41 } 34 }