linux-kernel - [PATCH v2 13/21] mm: workingset: use xas_set_lru() to pass shadow

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Message-Id: <20210527062148.9361-14-songmuchun@bytedance.com>
Date:   Thu, 27 May 2021 14:21:40 +0800
From:   Muchun Song <songmuchun@...edance.com>
To:     willy@...radead.org, akpm@...ux-foundation.org, hannes@...xchg.org,
        mhocko@...nel.org, vdavydov.dev@...il.com, shakeelb@...gle.com,
        guro@...com, shy828301@...il.com, alexs@...nel.org,
        richard.weiyang@...il.com, david@...morbit.com,
        trond.myklebust@...merspace.com, anna.schumaker@...app.com
Cc:     linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, linux-nfs@...r.kernel.org,
        zhengqi.arch@...edance.com, duanxiongchun@...edance.com,
        fam.zheng@...edance.com, Muchun Song <songmuchun@...edance.com>
Subject: [PATCH v2 13/21] mm: workingset: use xas_set_lru() to pass shadow_nodes

The workingset will add the xa_node to shadow_nodes, so we should use
xas_set_lru() to pass the list_lru which we want to insert xa_node
into to set up the xa_node reclaim context correctly.

Signed-off-by: Muchun Song <songmuchun@...edance.com>
---
 include/linux/swap.h | 5 ++++-
 mm/workingset.c      | 2 +-
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/include/linux/swap.h b/include/linux/swap.h
index 46d51d058d05..a2e1363b1509 100644
--- a/include/linux/swap.h
+++ b/include/linux/swap.h
@@ -323,9 +323,12 @@ void workingset_activation(struct page *page);
 
 /* Only track the nodes of mappings with shadow entries */
 void workingset_update_node(struct xa_node *node);
+extern struct list_lru shadow_nodes;
 #define mapping_set_update(xas, mapping) do {				\
-	if (!dax_mapping(mapping) && !shmem_mapping(mapping))		\
+	if (!dax_mapping(mapping) && !shmem_mapping(mapping)) {		\
 		xas_set_update(xas, workingset_update_node);		\
+		xas_set_lru(xas, &shadow_nodes);			\
+	}								\
 } while (0)
 
 /* linux/mm/page_alloc.c */
diff --git a/mm/workingset.c b/mm/workingset.c
index 4f7a306ce75a..e50827fc3994 100644
--- a/mm/workingset.c
+++ b/mm/workingset.c
@@ -426,7 +426,7 @@ void workingset_activation(struct page *page)
  * point where they would still be useful.
  */
 
-static struct list_lru shadow_nodes;
+struct list_lru shadow_nodes;
 
 void workingset_update_node(struct xa_node *node)
 {
-- 
2.11.0