linux-kernel - [PATCH] selftests/mm: fix split_huge_page_test for folio

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Message-ID: <20250709012800.3225727-1-ziy@nvidia.com>
Date: Tue,  8 Jul 2025 21:27:59 -0400
From: Zi Yan <ziy@...dia.com>
To: Andrew Morton <akpm@...ux-foundation.org>,
	linux-mm@...ck.org
Cc: David Hildenbrand <david@...hat.com>,
	Lorenzo Stoakes <lorenzo.stoakes@...cle.com>,
	Zi Yan <ziy@...dia.com>,
	Baolin Wang <baolin.wang@...ux.alibaba.com>,
	"Liam R. Howlett" <Liam.Howlett@...cle.com>,
	Nico Pache <npache@...hat.com>,
	Ryan Roberts <ryan.roberts@....com>,
	Dev Jain <dev.jain@....com>,
	Barry Song <baohua@...nel.org>,
	Shuah Khan <shuah@...nel.org>,
	linux-kselftest@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] selftests/mm: fix split_huge_page_test for folio_split() tests.

PID_FMT does not have an offset field, so folio_split() tests are not
performed. Add PID_FMT_OFFSET with an offset field and use it to perform
folio_split() tests.

Fixes: 80a5c494c89f ("selftests/mm: add tests for folio_split(), buddy allocator like split")
Signed-off-by: Zi Yan <ziy@...dia.com>
---
 tools/testing/selftests/mm/split_huge_page_test.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/mm/split_huge_page_test.c b/tools/testing/selftests/mm/split_huge_page_test.c
index aa7400ed0e99..f0d9c035641d 100644
--- a/tools/testing/selftests/mm/split_huge_page_test.c
+++ b/tools/testing/selftests/mm/split_huge_page_test.c
@@ -31,6 +31,7 @@ uint64_t pmd_pagesize;
 #define INPUT_MAX 80
 
 #define PID_FMT "%d,0x%lx,0x%lx,%d"
+#define PID_FMT_OFFSET "%d,0x%lx,0x%lx,%d,%d"
 #define PATH_FMT "%s,0x%lx,0x%lx,%d"
 
 #define PFN_MASK     ((1UL<<55)-1)
@@ -483,7 +484,7 @@ void split_thp_in_pagecache_to_order_at(size_t fd_size, const char *fs_loc,
 		write_debugfs(PID_FMT, getpid(), (uint64_t)addr,
 			      (uint64_t)addr + fd_size, order);
 	else
-		write_debugfs(PID_FMT, getpid(), (uint64_t)addr,
+		write_debugfs(PID_FMT_OFFSET, getpid(), (uint64_t)addr,
 			      (uint64_t)addr + fd_size, order, offset);
 
 	for (i = 0; i < fd_size; i++)
-- 
2.47.2