[merged mm-stable] vmstat-call-fold_vm_zone_numa_events-before-show-per-zone-numa-event.patch removed from -mm tree

[merged mm-stable] vmstat-call-fold_vm_zone_numa_events-before-show-per-zone-numa-event.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: vmstat: call fold_vm_zone_numa_events() before show per zone NUMA event
has been removed from the -mm tree.  Its filename was
     vmstat-call-fold_vm_zone_numa_events-before-show-per-zone-numa-event.patch

This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

------------------------------------------------------
From: MengEn Sun <mengensun@tencent.com>
Subject: vmstat: call fold_vm_zone_numa_events() before show per zone NUMA event
Date: Fri, 1 Nov 2024 12:06:38 +0800

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>
---

 mm/vmstat.c |    1 +
 1 file changed, 1 insertion(+)

--- a/mm/vmstat.c~vmstat-call-fold_vm_zone_numa_events-before-show-per-zone-numa-event
+++ a/mm/vmstat.c
@@ -1780,6 +1780,7 @@ 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));
_

Patches currently in -mm which might be from mengensun@tencent.com are