[PATCH v3 19/25] memcontrol-v1: Ignore ZONE_DEVICE pages
From: Alistair Popple <apopple@nvidia.com>
Date: 2024-11-22 01:42:45
Also in:
linux-arm-kernel, linux-cxl, linux-doc, linux-ext4, linux-fsdevel, linux-mm, linux-xfs, lkml, nvdimm
Subsystem:
control group - memory resource controller (memcg), memory management, the rest · Maintainers:
Johannes Weiner, Michal Hocko, Roman Gushchin, Shakeel Butt, Andrew Morton, Linus Torvalds
memcontrol currently ignores device dax and fs dax pages because these pages are considered special. To maintain existing behaviour once these pages are treated as normal pages and returned from vm_normal_page() add a test to explicitly skip charging them. Signed-off-by: Alistair Popple <apopple@nvidia.com> --- mm/memcontrol-v1.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/mm/memcontrol-v1.c b/mm/memcontrol-v1.c
index 81d8819..b10a095 100644
--- a/mm/memcontrol-v1.c
+++ b/mm/memcontrol-v1.c@@ -667,7 +667,7 @@ static struct page *mc_handle_present_pte(struct vm_area_struct *vma, { struct page *page = vm_normal_page(vma, addr, ptent); - if (!page) + if (!page || is_device_dax_page(page) || is_fsdax_page(page)) return NULL; if (PageAnon(page)) { if (!(mc.flags & MOVE_ANON))
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