On Wed, 25 Apr 2018, Roman Gushchin wrote:
> Don't show nr_indirectly_reclaimable in /proc/vmstat,
> because there is no need in exporting this vm counter
> to the userspace, and some changes are expected
> in reclaimable object accounting, which can alter
> this counter.
>
I don't think it should be a per-node vmstat, in this case. It appears
only to be used for the global context. Shouldn't this be handled like
totalram_pages, total_swap_pages, totalreserve_pages, etc?
> Signed-off-by: Roman Gushchin <guro@xxxxxx>
> Cc: Vlastimil Babka <vbabka@xxxxxxx>
> Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
> Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
> Cc: Alexander Viro <viro@xxxxxxxxxxxxxxxxxx>
> Cc: Michal Hocko <mhocko@xxxxxxxx>
> Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
> ---
> mm/vmstat.c | 6 +++++-
> 1 file changed, 5 insertions(+), 1 deletion(-)
>
> diff --git a/mm/vmstat.c b/mm/vmstat.c
> index 536332e988b8..a2b9518980ce 100644
> --- a/mm/vmstat.c
> +++ b/mm/vmstat.c
> @@ -1161,7 +1161,7 @@ const char * const vmstat_text[] = {
> "nr_vmscan_immediate_reclaim",
> "nr_dirtied",
> "nr_written",
> - "nr_indirectly_reclaimable",
> + "", /* nr_indirectly_reclaimable */
>
> /* enum writeback_stat_item counters */
> "nr_dirty_threshold",
> @@ -1740,6 +1740,10 @@ static int vmstat_show(struct seq_file *m, void *arg)
> unsigned long *l = arg;
> unsigned long off = l - (unsigned long *)m->private;
>
> + /* Skip hidden vmstat items. */
> + if (*vmstat_text[off] == '\0')
> + return 0;
> +
> seq_puts(m, vmstat_text[off]);
> seq_put_decimal_ull(m, " ", *l);
> seq_putc(m, '\n');
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