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mm: hugetlb_cma: optimize hugetlb_cma_alloc_frozen_folio()

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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>
This commit is contained in:
Kefeng Wang
2026-01-12 23:09:53 +08:00
committed by Andrew Morton
parent 5a74b9f1dc
commit d925730734
1 changed files with 4 additions and 1 deletions
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5
mm/hugetlb_cma.c
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@@ -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);