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AJvYcCUCTAh1/dnBen7KyfQ7H0SXOA+4rvPBhrs1iUS3Z1v06C49py9G57FnAUo9Ely8PomDcuJSBPJfhaOEoWr6@vger.kernel.org X-Gm-Message-State: AOJu0YzOJoMDVdoT02f4OFdEdOwddhz/ZPdmDC7RQBcqDzdoHLLeBe+z RXiGenho5cUTZqUQmmNldgViV9Z1beeg/zNAcCQL63e0SZzYVoup/Z4+frtVt7IREbm8zAZXMje TEUI76L6+Azy94Psh8PMBAw== X-Google-Smtp-Source: AGHT+IF1YPUusmAbmb3ZD3GPQhCrYy6/top7yw+u+NgqlU9DG8yUspI8ex9oYsbLJOClXn04qHIYKawEAR+7VdCYWQ== X-Received: from pfbbd12.prod.google.com ([2002:a05:6a00:278c:b0:740:555:f7af]) (user=ackerleytng job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6a20:3949:b0:1ee:dded:e5b with SMTP id adf61e73a8af0-215ff11a531mr7641318637.24.1747266219362; Wed, 14 May 2025 16:43:39 -0700 (PDT) Date: Wed, 14 May 2025 16:42:06 -0700 In-Reply-To: Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: X-Mailer: git-send-email 2.49.0.1045.g170613ef41-goog Message-ID: <779107f1ff8c79095ca0b2d7921e4c54e20861ad.1747264138.git.ackerleytng@google.com> Subject: [RFC PATCH v2 27/51] mm: hugetlb: Expose hugetlb_subpool_{get,put}_pages() From: Ackerley Tng To: kvm@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, x86@kernel.org, linux-fsdevel@vger.kernel.org Cc: ackerleytng@google.com, aik@amd.com, ajones@ventanamicro.com, akpm@linux-foundation.org, amoorthy@google.com, anthony.yznaga@oracle.com, anup@brainfault.org, aou@eecs.berkeley.edu, bfoster@redhat.com, binbin.wu@linux.intel.com, brauner@kernel.org, catalin.marinas@arm.com, chao.p.peng@intel.com, chenhuacai@kernel.org, dave.hansen@intel.com, david@redhat.com, dmatlack@google.com, dwmw@amazon.co.uk, erdemaktas@google.com, fan.du@intel.com, fvdl@google.com, graf@amazon.com, haibo1.xu@intel.com, hch@infradead.org, hughd@google.com, ira.weiny@intel.com, isaku.yamahata@intel.com, jack@suse.cz, james.morse@arm.com, jarkko@kernel.org, jgg@ziepe.ca, jgowans@amazon.com, jhubbard@nvidia.com, jroedel@suse.de, jthoughton@google.com, jun.miao@intel.com, kai.huang@intel.com, keirf@google.com, kent.overstreet@linux.dev, kirill.shutemov@intel.com, liam.merwick@oracle.com, maciej.wieczor-retman@intel.com, mail@maciej.szmigiero.name, maz@kernel.org, mic@digikod.net, michael.roth@amd.com, mpe@ellerman.id.au, muchun.song@linux.dev, nikunj@amd.com, nsaenz@amazon.es, oliver.upton@linux.dev, palmer@dabbelt.com, pankaj.gupta@amd.com, paul.walmsley@sifive.com, pbonzini@redhat.com, pdurrant@amazon.co.uk, peterx@redhat.com, pgonda@google.com, pvorel@suse.cz, qperret@google.com, quic_cvanscha@quicinc.com, quic_eberman@quicinc.com, quic_mnalajal@quicinc.com, quic_pderrin@quicinc.com, quic_pheragu@quicinc.com, quic_svaddagi@quicinc.com, quic_tsoni@quicinc.com, richard.weiyang@gmail.com, rick.p.edgecombe@intel.com, rientjes@google.com, roypat@amazon.co.uk, rppt@kernel.org, seanjc@google.com, shuah@kernel.org, steven.price@arm.com, steven.sistare@oracle.com, suzuki.poulose@arm.com, tabba@google.com, thomas.lendacky@amd.com, usama.arif@bytedance.com, vannapurve@google.com, vbabka@suse.cz, viro@zeniv.linux.org.uk, vkuznets@redhat.com, wei.w.wang@intel.com, will@kernel.org, willy@infradead.org, xiaoyao.li@intel.com, yan.y.zhao@intel.com, yilun.xu@intel.com, yuzenghui@huawei.com, zhiquan1.li@intel.com Content-Type: text/plain; charset="UTF-8" This will allow hugetlb subpools to be used by guestmem_hugetlb. Signed-off-by: Ackerley Tng Change-Id: I909355935f2ab342e65e7bfdc106bedd1dc177c9 --- include/linux/hugetlb.h | 3 +++ mm/hugetlb.c | 6 ++---- 2 files changed, 5 insertions(+), 4 deletions(-) diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h index c59264391c33..e6b90e72d46d 100644 --- a/include/linux/hugetlb.h +++ b/include/linux/hugetlb.h @@ -119,6 +119,9 @@ struct hugepage_subpool *hugepage_new_subpool(struct hstate *h, long max_hpages, long min_hpages, bool use_surplus); void hugepage_put_subpool(struct hugepage_subpool *spool); +long hugepage_subpool_get_pages(struct hugepage_subpool *spool, long delta); +long hugepage_subpool_put_pages(struct hugepage_subpool *spool, long delta); + void hugetlb_dup_vma_private(struct vm_area_struct *vma); void clear_vma_resv_huge_pages(struct vm_area_struct *vma); int move_hugetlb_page_tables(struct vm_area_struct *vma, diff --git a/mm/hugetlb.c b/mm/hugetlb.c index d22c5a8fd441..816f257680be 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -205,8 +205,7 @@ void hugepage_put_subpool(struct hugepage_subpool *spool) * only be different than the passed value (delta) in the case where * a subpool minimum size must be maintained. */ -static long hugepage_subpool_get_pages(struct hugepage_subpool *spool, - long delta) +long hugepage_subpool_get_pages(struct hugepage_subpool *spool, long delta) { long ret = delta; @@ -250,8 +249,7 @@ static long hugepage_subpool_get_pages(struct hugepage_subpool *spool, * The return value may only be different than the passed value (delta) * in the case where a subpool minimum size must be maintained. */ -static long hugepage_subpool_put_pages(struct hugepage_subpool *spool, - long delta) +long hugepage_subpool_put_pages(struct hugepage_subpool *spool, long delta) { long ret = delta; unsigned long flags; -- 2.49.0.1045.g170613ef41-goog