linux-kernel - [PATCH v1 1/6] fs/proc/task_mmu: indicate PM

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Message-ID: <20240607122357.115423-2-david@redhat.com>
Date: Fri,  7 Jun 2024 14:23:52 +0200
From: David Hildenbrand <david@...hat.com>
To: linux-kernel@...r.kernel.org
Cc: linux-mm@...ck.org,
	linux-doc@...r.kernel.org,
	linux-fsdevel@...r.kernel.org,
	David Hildenbrand <david@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jonathan Corbet <corbet@....net>,
	"Kirill A . Shutemov" <kirill.shutemov@...ux.intel.com>
Subject: [PATCH v1 1/6] fs/proc/task_mmu: indicate PM_FILE for PMD-mapped file THP

Looks like we never taught pagemap_pmd_range() about the existence of
PMD-mapped file THPs. Seems to date back to the times when we first added
support for non-anon THPs in the form of shmem THP.

Fixes: 800d8c63b2e9 ("shmem: add huge pages support")
Cc: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
Signed-off-by: David Hildenbrand <david@...hat.com>
---
 fs/proc/task_mmu.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index 5aceb3db7565e..08465b904ced5 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -1522,6 +1522,8 @@ static int pagemap_pmd_range(pmd_t *pmdp, unsigned long addr, unsigned long end,
 		}
 #endif
 
+		if (page && !PageAnon(page))
+			flags |= PM_FILE;
 		if (page && !migration && page_mapcount(page) == 1)
 			flags |= PM_MMAP_EXCLUSIVE;
 
-- 
2.45.2