linux-kernel - [PATCH 25/28] x86: don't reserve hugetlb memory in setup

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: <20251228124001.3624742-26-rppt@kernel.org>
Date: Sun, 28 Dec 2025 14:39:55 +0200
From: Mike Rapoport <rppt@...nel.org>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: Alex Shi <alexs@...nel.org>,
	Alexander Gordeev <agordeev@...ux.ibm.com>,
	Andreas Larsson <andreas@...sler.com>,
	Borislav Petkov <bp@...en8.de>,
	Brian Cain <bcain@...nel.org>,
	"Christophe Leroy (CS GROUP)" <chleroy@...nel.org>,
	Catalin Marinas <catalin.marinas@....com>,
	"David S. Miller" <davem@...emloft.net>,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	David Hildenbrand <david@...nel.org>,
	Dinh Nguyen <dinguyen@...nel.org>,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	Guo Ren <guoren@...nel.org>,
	Heiko Carstens <hca@...ux.ibm.com>,
	Helge Deller <deller@....de>,
	Huacai Chen <chenhuacai@...nel.org>,
	Ingo Molnar <mingo@...hat.com>,
	Johannes Berg <johannes@...solutions.net>,
	John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>,
	Jonathan Corbet <corbet@....net>,
	"Liam R. Howlett" <Liam.Howlett@...cle.com>,
	Lorenzo Stoakes <lorenzo.stoakes@...cle.com>,
	Magnus Lindholm <linmag7@...il.com>,
	Matt Turner <mattst88@...il.com>,
	Max Filippov <jcmvbkbc@...il.com>,
	Michael Ellerman <mpe@...erman.id.au>,
	Michal Hocko <mhocko@...e.com>,
	Michal Simek <monstr@...str.eu>,
	Mike Rapoport <rppt@...nel.org>,
	Muchun Song <muchun.song@...ux.dev>,
	Oscar Salvador <osalvador@...e.de>,
	Palmer Dabbelt <palmer@...belt.com>,
	Pratyush Yadav <pratyush@...nel.org>,
	Richard Weinberger <richard@....at>,
	Russell King <linux@...linux.org.uk>,
	Stafford Horne <shorne@...il.com>,
	Suren Baghdasaryan <surenb@...gle.com>,
	Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
	Thomas Gleixner <tglx@...utronix.de>,
	Vasily Gorbik <gor@...ux.ibm.com>,
	Vineet Gupta <vgupta@...nel.org>,
	Vlastimil Babka <vbabka@...e.cz>,
	Will Deacon <will@...nel.org>,
	x86@...nel.org,
	linux-alpha@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-csky@...r.kernel.org,
	linux-cxl@...r.kernel.org,
	linux-doc@...r.kernel.org,
	linux-hexagon@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-m68k@...ts.linux-m68k.org,
	linux-mips@...r.kernel.org,
	linux-mm@...ck.org,
	linux-openrisc@...r.kernel.org,
	linux-parisc@...r.kernel.org,
	linux-riscv@...ts.infradead.org,
	linux-s390@...r.kernel.org,
	linux-sh@...r.kernel.org,
	linux-snps-arc@...ts.infradead.org,
	linux-um@...ts.infradead.org,
	linuxppc-dev@...ts.ozlabs.org,
	loongarch@...ts.linux.dev,
	sparclinux@...r.kernel.org
Subject: [PATCH 25/28] x86: don't reserve hugetlb memory in setup_arch()

From: "Mike Rapoport (Microsoft)" <rppt@...nel.org>

Commit 665eaf313314 ("x86/setup: call hugetlb_bootmem_alloc early")
added an early call to hugetlb_bootmem_alloc() to setup_arch() to allow
HVO style pre-initialization of vmemmap on x86.

With the ordering of hugetlb reservation vs memory map initiaization
sorted out in core MM this no longer needs to be an architecture specific
quirk.

Drop the call to hugetlb_bootmem_alloc() from x86::setup_arch().

Signed-off-by: Mike Rapoport (Microsoft) <rppt@...nel.org>
---
 arch/x86/kernel/setup.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 1b2edd07a3e1..e2318fa9b1bb 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -1191,7 +1191,6 @@ void __init setup_arch(char **cmdline_p)
 
 	if (boot_cpu_has(X86_FEATURE_GBPAGES)) {
 		hugetlb_cma_reserve(PUD_SHIFT - PAGE_SHIFT);
-		hugetlb_bootmem_alloc();
 	}
 
 	/*
-- 
2.51.0