On 07/11/2014 11:17 PM, Christoph Lameter wrote:
> On Fri, 11 Jul 2014, Frederic Weisbecker wrote:
>
>>> Converted what? We still need to keep a cpumask around that tells us which
>>> processor have vmstat running and which do not.
>>>
>>
>> Converted to cpumask_var_t.
>>
>> I mean we spent dozens emails on that...
>
>
> Oh there is this outstanding fix, right.
>
>
> Subject: on demand vmstat: Do not open code alloc_cpumask_var
>
> Signed-off-by: Christoph Lameter <c...@linux.com>
>
> Index: linux/mm/vmstat.c
> ===================================================================
> --- linux.orig/mm/vmstat.c 2014-07-11 10:15:55.356856916 -0500
> +++ linux/mm/vmstat.c 2014-07-11 10:15:55.352856994 -0500
> @@ -1244,7 +1244,7 @@
> #ifdef CONFIG_SMP
> static DEFINE_PER_CPU(struct delayed_work, vmstat_work);
> int sysctl_stat_interval __read_mostly = HZ;
> -struct cpumask *cpu_stat_off;
> +cpumask_var_t cpu_stat_off;
>
> static void vmstat_update(struct work_struct *w)
> {
> @@ -1338,7 +1338,8 @@
> INIT_DEFERRABLE_WORK(per_cpu_ptr(&vmstat_work, cpu),
> vmstat_update);
>
> - cpu_stat_off = kmalloc(cpumask_size(), GFP_KERNEL);
> + if (!alloc_cpumask_var(&cpu_stat_off, GFP_KERNEL))
> + BUG();
BUG_ON(!alloc_cpumask_var(&cpu_stat_off, GFP_KERNEL));
> cpumask_copy(cpu_stat_off, cpu_online_mask);
>
> schedule_delayed_work(&shepherd,
> --
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