diff options
| author | Kefeng Wang <wangkefeng.wang@huawei.com> | 2026-01-12 18:09:53 +0300 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2026-02-01 01:22:43 +0300 |
| commit | d925730734e9e936146b7ba691aa02f1b60f2c61 (patch) | |
| tree | db578bd79b9be83b50c0a6f520f48f7361516666 | |
| parent | 5a74b9f1dc3d75635ca8918e53664d5d2ee0fff5 (diff) | |
| download | linux-d925730734e9e936146b7ba691aa02f1b60f2c61.tar.xz | |
mm: hugetlb_cma: optimize hugetlb_cma_alloc_frozen_folio()
Check hugetlb_cma_size which helps to avoid unnecessary gfp check or
nodemask traversal.
Link: https://lkml.kernel.org/r/20260112150954.1802953-5-wangkefeng.wang@huawei.com
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Reviewed-by: Zi Yan <ziy@nvidia.com>
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: Oscar Salvador <osalvador@suse.de>
Cc: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| -rw-r--r-- | mm/hugetlb_cma.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/mm/hugetlb_cma.c b/mm/hugetlb_cma.c index 0ddf9755c090..d8fa93825992 100644 --- a/mm/hugetlb_cma.c +++ b/mm/hugetlb_cma.c @@ -16,7 +16,7 @@ static struct cma *hugetlb_cma[MAX_NUMNODES]; static unsigned long hugetlb_cma_size_in_node[MAX_NUMNODES] __initdata; static bool hugetlb_cma_only; -static unsigned long hugetlb_cma_size __initdata; +static unsigned long hugetlb_cma_size __ro_after_init; void hugetlb_cma_free_frozen_folio(struct folio *folio) { @@ -31,6 +31,9 @@ struct folio *hugetlb_cma_alloc_frozen_folio(int order, gfp_t gfp_mask, struct folio *folio; struct page *page = NULL; + if (!hugetlb_cma_size) + return NULL; + if (hugetlb_cma[nid]) page = cma_alloc_frozen_compound(hugetlb_cma[nid], order); |