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vmstat: call fold_vm_zone_numa_events() before show per zone NUMA event

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commit 2ea80b039b9af0b71c00378523b71c254fb99c23 upstream.

Since 5.14-rc1, NUMA events will only be folded from per-CPU statistics to
per zone and global statistics when the user actually needs it.

Currently, the kernel has performs the fold operation when reading
/proc/vmstat, but does not perform the fold operation in /proc/zoneinfo.
This can lead to inaccuracies in the following statistics in zoneinfo:
- numa_hit
- numa_miss
- numa_foreign
- numa_interleave
- numa_local
- numa_other

Therefore, before printing per-zone vm_numa_event when reading
/proc/zoneinfo, we should also perform the fold operation.

Link: https://lkml.kernel.org/r/1730433998-10461-1-git-send-email-mengensun@tencent.com
Fixes: f19298b951 ("mm/vmstat: convert NUMA statistics to basic NUMA counters")
Signed-off-by: MengEn Sun <mengensun@tencent.com>
Reviewed-by: JinLiang Zheng <alexjlzheng@tencent.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
MengEn Sun 2024-11-01 12:06:38 +08:00 committed by Greg Kroah-Hartman
parent 7ae27880de
commit df8796f1cc
1 changed files with 1 additions and 0 deletions
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1
mm/vmstat.c
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@ -1711,6 +1711,7 @@ static void zoneinfo_show_print(struct seq_file *m, pg_data_t *pgdat,
zone_page_state(zone, i)); zone_page_state(zone, i));
#ifdef CONFIG_NUMA #ifdef CONFIG_NUMA
fold_vm_zone_numa_events(zone);
for (i = 0; i < NR_VM_NUMA_EVENT_ITEMS; i++) for (i = 0; i < NR_VM_NUMA_EVENT_ITEMS; i++)
seq_printf(m, "\n %-12s %lu", numa_stat_name(i), seq_printf(m, "\n %-12s %lu", numa_stat_name(i),
zone_numa_event_state(zone, i)); zone_numa_event_state(zone, i));