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Commit 9eccf2a8 authored by Christoph Lameter's avatar Christoph Lameter Committed by Linus Torvalds
Browse files

vmstat: remove prefetch 



Remove the prefetch logic in order to avoid touching impossible per cpu
areas.

Signed-off-by: default avatarChristoph Lameter <clameter@sgi.com>
Cc: Mike Travis <travis@sgi.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 7766755a

mm/vmstat.c

+2 −9
Original line number Diff line number Diff line
@@ -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];

	}