linux-kernel - [PATCH 7/7] memcg: make PGPGIN and PGPGOUT v1 only

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Message-ID: <20240815050453.1298138-8-shakeel.butt@linux.dev>
Date: Wed, 14 Aug 2024 22:04:53 -0700
From: Shakeel Butt <shakeel.butt@...ux.dev>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: Johannes Weiner <hannes@...xchg.org>,
	Michal Hocko <mhocko@...nel.org>,
	Roman Gushchin <roman.gushchin@...ux.dev>,
	Muchun Song <muchun.song@...ux.dev>,
	"T . J . Mercier" <tjmercier@...gle.com>,
	linux-mm@...ck.org,
	linux-kernel@...r.kernel.org,
	Meta kernel team <kernel-team@...a.com>,
	cgroups@...r.kernel.org
Subject: [PATCH 7/7] memcg: make PGPGIN and PGPGOUT v1 only

Currently PGPGIN and PGPGOUT are used and exposed in the memcg v1 only
code. So, let's put them under CONFIG_MEMCG_V1.

Signed-off-by: Shakeel Butt <shakeel.butt@...ux.dev>
---
 mm/memcontrol.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index c4b06f26ccfd..9932074c617a 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -411,8 +411,10 @@ unsigned long lruvec_page_state_local(struct lruvec *lruvec,
 
 /* Subset of vm_event_item to report for memcg event stats */
 static const unsigned int memcg_vm_event_stat[] = {
+#ifdef CONFIG_MEMCG_V1
 	PGPGIN,
 	PGPGOUT,
+#endif
 	PGSCAN_KSWAPD,
 	PGSCAN_DIRECT,
 	PGSCAN_KHUGEPAGED,
@@ -1461,10 +1463,11 @@ static void memcg_stat_format(struct mem_cgroup *memcg, struct seq_buf *s)
 		       memcg_events(memcg, PGSTEAL_KHUGEPAGED));
 
 	for (i = 0; i < ARRAY_SIZE(memcg_vm_event_stat); i++) {
+#ifdef CONFIG_MEMCG_V1
 		if (memcg_vm_event_stat[i] == PGPGIN ||
 		    memcg_vm_event_stat[i] == PGPGOUT)
 			continue;
-
+#endif
 		seq_buf_printf(s, "%s %lu\n",
 			       vm_event_name(memcg_vm_event_stat[i]),
 			       memcg_events(memcg, memcg_vm_event_stat[i]));
-- 
2.43.5