From: lirongqing <lirongqing@baidu.com>
To: <muchun.song@linux.dev>, <osalvador@suse.de>, <david@redhat.com>,
<akpm@linux-foundation.org>, <linux-mm@kvack.org>,
<linux-kernel@vger.kernel.org>
Cc: Li RongQing <lirongqing@baidu.com>
Subject: [PATCH] mm/hugetlb: early exit from hugetlb_pages_alloc_boot() when max_huge_pages=0
Date: Thu, 14 Aug 2025 16:29:50 +0800 [thread overview]
Message-ID: <20250814082950.2888-1-lirongqing@baidu.com> (raw)
From: Li RongQing <lirongqing@baidu.com>
Optimize hugetlb_pages_alloc_boot() to return immediately when
max_huge_pages is 0, saving cycles when hugepages aren't configured
in the kernel command line.
Signed-off-by: Li RongQing <lirongqing@baidu.com>
---
mm/hugetlb.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 753f99b..514fab5 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -3654,6 +3654,9 @@ static void __init hugetlb_hstate_alloc_pages(struct hstate *h)
return;
}
+ if (!h->max_huge_pages)
+ return;
+
/* do node specific alloc */
if (hugetlb_hstate_alloc_pages_specific_nodes(h))
return;
--
2.9.4
next reply other threads:[~2025-08-14 8:30 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-08-14 8:29 lirongqing [this message]
2025-08-14 9:01 ` David Hildenbrand
2025-08-14 9:12 ` [外部邮件] " Li,Rongqing
2025-08-14 9:15 ` David Hildenbrand
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