linux-kernel - [PATCH v2 04/28] mm, hugetlb: use cma_declare_contiguous

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20250129224157.2046079-5-fvdl@google.com>
Date: Wed, 29 Jan 2025 22:41:33 +0000
From: Frank van der Linden <fvdl@...gle.com>
To: akpm@...ux-foundation.org, muchun.song@...ux.dev, linux-mm@...ck.org, 
	linux-kernel@...r.kernel.org
Cc: yuzhao@...gle.com, usamaarif642@...il.com, joao.m.martins@...cle.com, 
	roman.gushchin@...ux.dev, Frank van der Linden <fvdl@...gle.com>
Subject: [PATCH v2 04/28] mm, hugetlb: use cma_declare_contiguous_multi

hugetlb_cma is fine with using multiple CMA ranges, as long as it
can get its gigantic pages allocated from them. So, use
cma_declare_contiguous_multi to allow for multiple ranges,
increasing the chances of getting what we want on systems
with gaps in physical memory.

Signed-off-by: Frank van der Linden <fvdl@...gle.com>
---
 mm/hugetlb.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 3b25b69aa94f..bc8af09a3105 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -7738,9 +7738,8 @@ void __init hugetlb_cma_reserve(int order)
 		 * may be returned to CMA allocator in the case of
 		 * huge page demotion.
 		 */
-		res = cma_declare_contiguous_nid(0, size, 0,
-					PAGE_SIZE << order,
-					HUGETLB_PAGE_ORDER, false, name,
+		res = cma_declare_contiguous_multi(size, PAGE_SIZE << order,
+					HUGETLB_PAGE_ORDER, name,
 					&hugetlb_cma[nid], nid);
 		if (res) {
 			pr_warn("hugetlb_cma: reservation failed: err %d, node %d",
-- 
2.48.1.262.g85cc9f2d1e-goog