On Wed, 13 Jan 2016 17:01:08 -0500 Johannes Weiner <hannes@xxxxxxxxxxx> wrote:
> Provide a cgroup2 memory.stat that provides statistics on LRU memory
> and fault event counters. More consumers and breakdowns will follow.
>
> ...
>
> @@ -5095,6 +5107,46 @@ static int memory_events_show(struct seq_file *m, void *v)
> return 0;
> }
>
> +static int memory_stat_show(struct seq_file *m, void *v)
> +{
> + struct mem_cgroup *memcg = mem_cgroup_from_css(seq_css(m));
> + int i;
> +
> + /* Memory consumer totals */
> +
> + seq_printf(m, "anon %lu\n",
> + tree_stat(memcg, MEM_CGROUP_STAT_RSS) * PAGE_SIZE);
Is there any reason why this won't overflow a longword on 32-bit?
> + seq_printf(m, "file %lu\n",
> + tree_stat(memcg, MEM_CGROUP_STAT_CACHE) * PAGE_SIZE);
> +
> + /* Per-consumer breakdowns */
> +
> + for (i = 0; i < NR_LRU_LISTS; i++) {
> + struct mem_cgroup *mi;
> + unsigned long val = 0;
> +
> + for_each_mem_cgroup_tree(mi, memcg)
> + val += mem_cgroup_nr_lru_pages(mi, BIT(i)) * PAGE_SIZE;
> + seq_printf(m, "%s %lu\n", mem_cgroup_lru_names[i], val);
> + }
> +
> + seq_printf(m, "file_mapped %lu\n",
> + tree_stat(memcg, MEM_CGROUP_STAT_FILE_MAPPED) * PAGE_SIZE);
> + seq_printf(m, "file_dirty %lu\n",
> + tree_stat(memcg, MEM_CGROUP_STAT_DIRTY) * PAGE_SIZE);
> + seq_printf(m, "file_writeback %lu\n",
> + tree_stat(memcg, MEM_CGROUP_STAT_WRITEBACK) * PAGE_SIZE);
> +
> + /* Memory management events */
> +
> + seq_printf(m, "pgfault %lu\n",
> + tree_events(memcg, MEM_CGROUP_EVENTS_PGFAULT));
> + seq_printf(m, "pgmajfault %lu\n",
> + tree_events(memcg, MEM_CGROUP_EVENTS_PGMAJFAULT));
> +
> + return 0;
> +}
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@xxxxxxxxx. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>