linux-kernel - [PATCH 15/45] fs/proc: Adjust pte_to_pagemap

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Message-ID: <20240704043132.28501-16-osalvador@suse.de>
Date: Thu,  4 Jul 2024 06:31:02 +0200
From: Oscar Salvador <osalvador@...e.de>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: linux-kernel@...r.kernel.org,
	linux-mm@...ck.org,
	Peter Xu <peterx@...hat.com>,
	Muchun Song <muchun.song@...ux.dev>,
	David Hildenbrand <david@...hat.com>,
	SeongJae Park <sj@...nel.org>,
	Miaohe Lin <linmiaohe@...wei.com>,
	Michal Hocko <mhocko@...e.com>,
	Matthew Wilcox <willy@...radead.org>,
	Christophe Leroy <christophe.leroy@...roup.eu>,
	Oscar Salvador <osalvador@...e.de>
Subject: [PATCH 15/45] fs/proc: Adjust pte_to_pagemap_entry for hugetlb vmas

HugeTLB pages cannot be swapped , so do not mark them as that.

Signed-off-by: Oscar Salvador <osalvador@...e.de>
---
 fs/proc/task_mmu.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index 5965a074467e..22200018371d 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -1795,7 +1795,8 @@ static pagemap_entry_t pte_to_pagemap_entry(struct pagemapread *pm,
 			frame = swp_type(entry) |
 			    (offset << MAX_SWAPFILES_SHIFT);
 		}
-		flags |= PM_SWAP;
+		if (!is_vm_hugetlb_page(vma))
+			flags |= PM_SWAP;
 		if (is_pfn_swap_entry(entry))
 			page = pfn_swap_entry_to_page(entry);
 		if (pte_marker_entry_uffd_wp(entry))
-- 
2.26.2