[PATCH v6 4/4] mm: ratelimit min_free_kbytes adjustment messages
From: Breno Leitao <leitao@debian.org>
Date: 2026-03-11 10:19:49
Also in:
lkml
Subsystem:
memory management, memory management - page allocator, memory management - thp (transparent huge page), the rest · Maintainers:
Andrew Morton, Vlastimil Babka, David Hildenbrand, Lorenzo Stoakes, Linus Torvalds
The "raising min_free_kbytes" pr_info message in set_recommended_min_free_kbytes() and the "min_free_kbytes is not updated to" pr_warn in calculate_min_free_kbytes() can spam the kernel log when called repeatedly. Switch the pr_info in set_recommended_min_free_kbytes() and the pr_warn in calculate_min_free_kbytes() to their _ratelimited variants to prevent the log spam for this message. Reviewed-by: Lorenzo Stoakes (Oracle) <ljs@kernel.org> Acked-by: David Hildenbrand (Arm) <david@kernel.org> Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com> Acked-by: Zi Yan <ziy@nvidia.com> Signed-off-by: Breno Leitao <leitao@debian.org> --- mm/khugepaged.c | 4 ++-- mm/page_alloc.c | 4 ++-- 2 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/mm/khugepaged.c b/mm/khugepaged.c
index 56a41c21b44c9..d44d463ccfd3e 100644
--- a/mm/khugepaged.c
+++ b/mm/khugepaged.c@@ -2671,8 +2671,8 @@ void set_recommended_min_free_kbytes(void) if (recommended_min > min_free_kbytes) { if (user_min_free_kbytes >= 0) - pr_info("raising min_free_kbytes from %d to %lu to help transparent hugepage allocations\n", - min_free_kbytes, recommended_min); + pr_info_ratelimited("raising min_free_kbytes from %d to %lu to help transparent hugepage allocations\n", + min_free_kbytes, recommended_min); min_free_kbytes = recommended_min; }
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 2d4b6f1a554ed..c840c886807bf 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c@@ -6553,8 +6553,8 @@ void calculate_min_free_kbytes(void) if (new_min_free_kbytes > user_min_free_kbytes) min_free_kbytes = clamp(new_min_free_kbytes, 128, 262144); else - pr_warn("min_free_kbytes is not updated to %d because user defined value %d is preferred\n", - new_min_free_kbytes, user_min_free_kbytes); + pr_warn_ratelimited("min_free_kbytes is not updated to %d because user defined value %d is preferred\n", + new_min_free_kbytes, user_min_free_kbytes); }
--
2.52.0