linux-kernel - [RFC PATCH 6/9] shmem: set folio uptodate when reclaim

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Date: Fri, 9 Feb 2024 14:29:03 +0000
From: Daniel Gomez <da.gomez@...sung.com>
To: "viro@...iv.linux.org.uk" <viro@...iv.linux.org.uk>,
	"brauner@...nel.org" <brauner@...nel.org>, "jack@...e.cz" <jack@...e.cz>,
	"hughd@...gle.com" <hughd@...gle.com>, "akpm@...ux-foundation.org"
	<akpm@...ux-foundation.org>
CC: "dagmcr@...il.com" <dagmcr@...il.com>, "linux-fsdevel@...r.kernel.org"
	<linux-fsdevel@...r.kernel.org>, "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>, "linux-mm@...ck.org" <linux-mm@...ck.org>,
	"willy@...radead.org" <willy@...radead.org>, "hch@...radead.org"
	<hch@...radead.org>, "mcgrof@...nel.org" <mcgrof@...nel.org>, Pankaj Raghav
	<p.raghav@...sung.com>, "gost.dev@...sung.com" <gost.dev@...sung.com>,
	Daniel Gomez <da.gomez@...sung.com>
Subject: [RFC PATCH 6/9] shmem: set folio uptodate when reclaim

When reclaiming some space by splitting a large folio through
shmem_unused_huge_shrink(), a large folio is split regardless of its
uptodate status. Mark all the blocks as uptodate in the reclaim path so
split_folio() can release the folio private struct (shmem_folio_state).

Signed-off-by: Daniel Gomez <da.gomez@...sung.com>
---
 mm/shmem.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/mm/shmem.c b/mm/shmem.c
index b6f9a60b179b..9fa86cb82da9 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -836,6 +836,7 @@ static unsigned long shmem_unused_huge_shrink(struct shmem_sb_info *sbinfo,
 			goto move_back;
 		}
 
+		shmem_set_range_uptodate(folio, 0, folio_size(folio));
 		ret = split_folio(folio);
 		folio_unlock(folio);
 		folio_put(folio);
-- 
2.43.0