Re: [PATCH v3 5/8] mm: set the VM_MAYBE_GUARD flag on guard region install
From: Lorenzo Stoakes <hidden>
Date: 2025-11-10 17:43:51
Also in:
linux-doc, linux-fsdevel, linux-kselftest, linux-mm, lkml
Subsystem:
memory management, memory management - thp (transparent huge page), the rest · Maintainers:
Andrew Morton, David Hildenbrand, Lorenzo Stoakes, Linus Torvalds
Hi Andrew, Please apply this trivial comment fixup fix-patch. Thanks, Lorenzo ----8<---- From ed78447f613dc9ef16ce9d7a7e43de993379d9f5 Mon Sep 17 00:00:00 2001 From: Lorenzo Stoakes <redacted> Date: Mon, 10 Nov 2025 17:41:15 +0000 Subject: [PATCH] fixup Signed-off-by: Lorenzo Stoakes <redacted> --- mm/khugepaged.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/mm/khugepaged.c b/mm/khugepaged.c
index c75afeac4bbb..742b47e0fb75 100644
--- a/mm/khugepaged.c
+++ b/mm/khugepaged.c@@ -1806,9 +1806,8 @@ static void retract_page_tables(struct address_space *mapping, pgoff_t pgoff) * userfaultfd_wp() vmas. But since the mmap_lock is not held, * it is still possible for a racing userfaultfd_ioctl() or * madvise() to have inserted ptes or markers. Now that we hold - * ptlock, repeating the anon_vma check protects from one - * category, and repeating the userfaultfd_wp() check from - * another. + * ptlock, repeating the retractable checks protects us from + * races against the prior checks. */ if (likely(file_backed_vma_is_retractable(vma))) { pgt_pmd = pmdp_collapse_flush(vma, addr, pmd); --
2.51.0