6.6-stable review patch. If anyone has any objections, please let me know.
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From: MengEn Sun mengensun@tencent.com
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@tencen... 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 Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- mm/vmstat.c | 1 + 1 file changed, 1 insertion(+)
--- a/mm/vmstat.c +++ b/mm/vmstat.c @@ -1723,6 +1723,7 @@ static void zoneinfo_show_print(struct s 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));