The patch titled
Subject: mm: migrate_device: use a folio in migrate_device_range()
has been added to the -mm mm-unstable branch. Its filename is
mm-migrate_device-use-a-folio-in-migrate_device_range.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-migrate_device-use-a-folio-in-migrate_device_range.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Kefeng Wang <wangkefeng.wang@xxxxxxxxxx>
Subject: mm: migrate_device: use a folio in migrate_device_range()
Date: Mon, 26 Aug 2024 14:58:10 +0800
Save two calls to compound_head() and use folio throughout.
Link: https://lkml.kernel.org/r/20240826065814.1336616-3-wangkefeng.wang@xxxxxxxxxx
Signed-off-by: Kefeng Wang <wangkefeng.wang@xxxxxxxxxx>
Acked-by: David Hildenbrand <david@xxxxxxxxxx>
Reviewed-by: Vishal Moola (Oracle) <vishal.moola@xxxxxxxxx>
Reviewed-by: Alistair Popple <apopple@xxxxxxxxxx>
Cc: Baolin Wang <baolin.wang@xxxxxxxxxxxxxxxxx>
Cc: Jonathan Corbet <corbet@xxxxxxx>
Cc: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Cc: Zi Yan <ziy@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/migrate_device.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
--- a/mm/migrate_device.c~mm-migrate_device-use-a-folio-in-migrate_device_range
+++ a/mm/migrate_device.c
@@ -898,16 +898,17 @@ int migrate_device_range(unsigned long *
unsigned long i, pfn;
for (pfn = start, i = 0; i < npages; pfn++, i++) {
- struct page *page = pfn_to_page(pfn);
+ struct folio *folio;
- if (!get_page_unless_zero(page)) {
+ folio = folio_get_nontail_page(pfn_to_page(pfn));
+ if (!folio) {
src_pfns[i] = 0;
continue;
}
- if (!trylock_page(page)) {
+ if (!folio_trylock(folio)) {
src_pfns[i] = 0;
- put_page(page);
+ folio_put(folio);
continue;
}
_
Patches currently in -mm which might be from wangkefeng.wang@xxxxxxxxxx are
mm-hugetlb-remove-left-over-comment-about-follow_huge_foo.patch
mm-remove-migration-for-hugepage-in-isolate_single_pageblock.patch
mm-memory_hotplug-remove-head-variable-in-do_migrate_range.patch
mm-memory-failure-add-unmap_poisoned_folio.patch
mm-memory_hotplug-check-hwpoisoned-page-firstly-in-do_migrate_range.patch
mm-migrate-add-isolate_folio_to_list.patch
mm-memory_hotplug-unify-huge-lru-non-lru-movable-folio-isolation.patch
mm-migrate_device-convert-to-migrate_device_coherent_folio.patch
mm-migrate_device-use-a-folio-in-migrate_device_range.patch
mm-migrate_device-use-more-folio-in-migrate_device_unmap.patch
mm-migrate_device-use-more-folio-in-migrate_device_finalize.patch
mm-remove-isolate_lru_page.patch
mm-remove-isolate_lru_page-fix.patch
mm-remove-putback_lru_page.patch
