diff options
| author | Kefeng Wang <wangkefeng.wang@huawei.com> | 2026-01-12 23:09:50 +0800 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2026-01-31 14:22:42 -0800 |
| commit | c83109e95c9d78e41b39e65b6490e511f4b8fba2 (patch) | |
| tree | 4cb1af117faf21887fd38e2ee27fd55afee5933e /include | |
| parent | fde8353121aa304ee88542f011dd5dc83ced47e4 (diff) | |
mm: page_isolation: introduce page_is_unmovable()
Patch series "mm: accelerate gigantic folio allocation".
Optimize pfn_range_valid_contig() and replace_free_hugepage_folios() in
alloc_contig_frozen_pages() to speed up gigantic folio allocation. The
allocation time for 120*1G folios drops from 3.605s to 0.431s.
This patch (of 5):
Factor out the check if a page is unmovable into a new helper, and will be
reused in the following patch.
No functional change intended, the minor changes are as follows,
1) Avoid unnecessary calls by checking CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION
2) Directly call PageCompound since PageTransCompound may be dropped
3) Using folio_test_hugetlb()
Link: https://lkml.kernel.org/r/20260112150954.1802953-1-wangkefeng.wang@huawei.com
Link: https://lkml.kernel.org/r/20260112150954.1802953-2-wangkefeng.wang@huawei.com
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Reviewed-by: Zi Yan <ziy@nvidia.com>
Reviewed-by: Oscar Salvador <osalvador@suse.de>
Cc: Brendan Jackman <jackmanb@google.com>
Cc: David Hildenbrand <david@kernel.org>
Cc: Jane Chu <jane.chu@oracle.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/page-isolation.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/page-isolation.h b/include/linux/page-isolation.h index 3e2f960e166c..6f8638c9904f 100644 --- a/include/linux/page-isolation.h +++ b/include/linux/page-isolation.h @@ -67,4 +67,6 @@ void undo_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn); int test_pages_isolated(unsigned long start_pfn, unsigned long end_pfn, enum pb_isolate_mode mode); +bool page_is_unmovable(struct zone *zone, struct page *page, + enum pb_isolate_mode mode, unsigned long *step); #endif |