[RFC PATCH v4 07/27] mm/madvise: skip madvise for managed-memory folios
STALE103d
From: Gregory Price <gourry@gourry.net>
Date: 2026-02-22 08:49:22
Also in:
cgroups, damon, linux-cxl, linux-mm, lkml
Subsystem:
memory management, memory mapping - madvise (memory advice), the rest · Maintainers:
Andrew Morton, Liam R. Howlett, Lorenzo Stoakes, David Hildenbrand, Linus Torvalds
Private node folios are managed by device drivers and should not be subjectto madvise cold/pageout/free operations that would interfere with the driver's memory management. Extend the existing zone_device check to cover private nodes. Signed-off-by: Gregory Price <gourry@gourry.net> --- mm/madvise.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/mm/madvise.c b/mm/madvise.c
index b617b1be0f53..3aac105e840b 100644
--- a/mm/madvise.c
+++ b/mm/madvise.c@@ -32,6 +32,7 @@ #include <linux/leafops.h> #include <linux/shmem_fs.h> #include <linux/mmu_notifier.h> +#include <linux/node_private.h> #include <asm/tlb.h>
@@ -475,7 +476,7 @@ static int madvise_cold_or_pageout_pte_range(pmd_t *pmd, continue; folio = vm_normal_folio(vma, addr, ptent); - if (!folio || folio_is_zone_device(folio)) + if (!folio || unlikely(folio_is_private_managed(folio))) continue; /*
@@ -704,7 +705,7 @@ static int madvise_free_pte_range(pmd_t *pmd, unsigned long addr, } folio = vm_normal_folio(vma, addr, ptent); - if (!folio || folio_is_zone_device(folio)) + if (!folio || unlikely(folio_is_private_managed(folio))) continue; /*
--
2.53.0