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Tue, 09 Mar 2021 23:18:55 -0800 (PST) Received: from localhost.localdomain ([139.177.225.255]) by smtp.gmail.com with ESMTPSA id h15sm2828868pfo.20.2021.03.09.23.18.49 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Tue, 09 Mar 2021 23:18:55 -0800 (PST) From: Muchun Song To: will@kernel.org, akpm@linux-foundation.org, david@redhat.com, bodeddub@amazon.com, osalvador@suse.de, mike.kravetz@oracle.com, rientjes@google.com Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, duanxiongchun@bytedance.com, Muchun Song Subject: [PATCH 3/3] arm64: mm: hugetlb: add support for free vmemmap pages of HugeTLB Date: Wed, 10 Mar 2021 15:15:35 +0800 Message-Id: <20210310071535.35245-4-songmuchun@bytedance.com> X-Mailer: git-send-email 2.21.0 (Apple Git-122) In-Reply-To: <20210310071535.35245-1-songmuchun@bytedance.com> References: <20210310071535.35245-1-songmuchun@bytedance.com> MIME-Version: 1.0 X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: EC9148019144 X-Stat-Signature: sd6ue8kgw9baby5zihoq6zokzswosjw5 Received-SPF: none (bytedance.com>: No applicable sender policy available) receiver=imf16; identity=mailfrom; envelope-from=""; helo=mail-pj1-f43.google.com; client-ip=209.85.216.43 X-HE-DKIM-Result: pass/pass X-HE-Tag: 1615360735-766055 Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: The preparation of supporting freeing vmemmap associated with each infrastructure is ready, so now we can support it for arm64. Signed-off-by: Muchun Song --- arch/arm64/mm/mmu.c | 5 +++++ fs/Kconfig | 4 ++-- 2 files changed, 7 insertions(+), 2 deletions(-) diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c index 3802cfbdd20d..6051a120c906 100644 --- a/arch/arm64/mm/mmu.c +++ b/arch/arm64/mm/mmu.c @@ -22,6 +22,7 @@ #include #include #include +#include =20 #include #include @@ -1109,6 +1110,10 @@ int __meminit vmemmap_populate(unsigned long start= , unsigned long end, int node, pmd_t *pmdp; =20 WARN_ON((start < VMEMMAP_START) || (end > VMEMMAP_END)); + + if (is_hugetlb_free_vmemmap_enabled() && !altmap) + return vmemmap_populate_basepages(start, end, node, altmap); + do { next =3D pmd_addr_end(addr, end); =20 diff --git a/fs/Kconfig b/fs/Kconfig index b5dcc68aab25..d90860135844 100644 --- a/fs/Kconfig +++ b/fs/Kconfig @@ -239,9 +239,9 @@ config HUGETLB_PAGE =20 config HUGETLB_PAGE_FREE_VMEMMAP def_bool HUGETLB_PAGE - depends on X86_64 + select HAVE_BOOTMEM_INFO_NODE if X86_64 depends on SPARSEMEM_VMEMMAP - depends on HAVE_BOOTMEM_INFO_NODE + depends on X86_64 || ARM64 =20 config MEMFD_CREATE def_bool TMPFS || HUGETLBFS --=20 2.11.0