linux-kernel - [PATCH v3 1/4] mm/huge_memory: add new_order and offset to split_huge_pages*() pr

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Message-ID: <20250812155512.926011-2-ziy@nvidia.com>
Date: Tue, 12 Aug 2025 11:55:09 -0400
From: Zi Yan <ziy@...dia.com>
To: Wei Yang <richard.weiyang@...il.com>,
	wang lian <lianux.mm@...il.com>,
	Baolin Wang <baolin.wang@...ux.alibaba.com>,
	David Hildenbrand <david@...hat.com>,
	linux-mm@...ck.org
Cc: Andrew Morton <akpm@...ux-foundation.org>,
	Lorenzo Stoakes <lorenzo.stoakes@...cle.com>,
	Zi Yan <ziy@...dia.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>,
	Vlastimil Babka <vbabka@...e.cz>,
	Mike Rapoport <rppt@...nel.org>,
	Suren Baghdasaryan <surenb@...gle.com>,
	Michal Hocko <mhocko@...e.com>,
	Shuah Khan <shuah@...nel.org>,
	linux-kernel@...r.kernel.org,
	linux-kselftest@...r.kernel.org,
	Donet Tom <donettom@...ux.ibm.com>
Subject: [PATCH v3 1/4] mm/huge_memory: add new_order and offset to split_huge_pages*() pr_debug.

They are useful information for debugging split huge page tests.

Signed-off-by: Zi Yan <ziy@...dia.com>
Reviewed-by: Wei Yang <richard.weiyang@...il.com>
Reviewed-by: Donet Tom <donettom@...ux.ibm.com>
Reviewed-by: wang lian <lianux.mm@...il.com>
Reviewed-by: Baolin Wang <baolin.wang@...ux.alibaba.com>
Reviewed-by: Barry Song <baohua@...nel.org>
Acked-by: David Hildenbrand <david@...hat.com>
---
 mm/huge_memory.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index b8bb078a1a34..22dc727d1d27 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -4319,8 +4319,8 @@ static int split_huge_pages_pid(int pid, unsigned long vaddr_start,
 		goto out;
 	}
 
-	pr_debug("Split huge pages in pid: %d, vaddr: [0x%lx - 0x%lx]\n",
-		 pid, vaddr_start, vaddr_end);
+	pr_debug("Split huge pages in pid: %d, vaddr: [0x%lx - 0x%lx], new_order: %u, in_folio_offset: %ld\n",
+		 pid, vaddr_start, vaddr_end, new_order, in_folio_offset);
 
 	mmap_read_lock(mm);
 	/*
@@ -4430,8 +4430,8 @@ static int split_huge_pages_in_file(const char *file_path, pgoff_t off_start,
 	if (IS_ERR(candidate))
 		goto out;
 
-	pr_debug("split file-backed THPs in file: %s, page offset: [0x%lx - 0x%lx]\n",
-		 file_path, off_start, off_end);
+	pr_debug("split file-backed THPs in file: %s, page offset: [0x%lx - 0x%lx], new_order: %u, in_folio_offset: %ld\n",
+		 file_path, off_start, off_end, new_order, in_folio_offset);
 
 	mapping = candidate->f_mapping;
 	min_order = mapping_min_folio_order(mapping);
-- 
2.47.2