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| author | MengEn Sun <mengensun@tencent.com> | 2024-11-01 12:06:38 +0800 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2024-11-14 22:49:19 -0800 |
| commit | 2ea80b039b9af0b71c00378523b71c254fb99c23 (patch) | |
| tree | 595a63bff410f556f4606ee2f3d9aecebb8b8e33 /mm | |
| parent | 9b5c87d47949292ff21ee2fadd1e83820662a430 (diff) | |
| download | lwn-2ea80b039b9af0b71c00378523b71c254fb99c23.tar.gz lwn-2ea80b039b9af0b71c00378523b71c254fb99c23.zip | |
vmstat: call fold_vm_zone_numa_events() before show per zone NUMA event
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: f19298b9516c ("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>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/vmstat.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/mm/vmstat.c b/mm/vmstat.c index 3d82bb906dcf..11a37c528395 100644 --- a/mm/vmstat.c +++ b/mm/vmstat.c @@ -1780,6 +1780,7 @@ static void zoneinfo_show_print(struct seq_file *m, pg_data_t *pgdat, zone_page_state(zone, i)); #ifdef CONFIG_NUMA + fold_vm_zone_numa_events(zone); for (i = 0; i < NR_VM_NUMA_EVENT_ITEMS; i++) seq_printf(m, "\n %-12s %lu", numa_stat_name(i), zone_numa_event_state(zone, i)); |