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[124.209.175.111]) by smtp.gmail.com with ESMTPSA id q14-20020aa7960e000000b0069305627491sm2664259pfg.159.2023.10.21.00.42.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 21 Oct 2023 00:42:45 -0700 (PDT) Date: Sat, 21 Oct 2023 16:42:38 +0900 From: Sergey Senozhatsky To: Mike Kravetz Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, Muchun Song , Joao Martins , Konrad Dybcio , Oscar Salvador , David Hildenbrand , Miaohe Lin , David Rientjes , Anshuman Khandual , Naoya Horiguchi , Barry Song <21cnbao@gmail.com>, Michal Hocko , Matthew Wilcox , Xiongchun Duan , Sergey Senozhatsky , Usama Arif , Andrew Morton Subject: Re: [PATCH v8 2/8] hugetlb: restructure pool allocations Message-ID: <20231021074238.GA1004891@google.com> References: <20231019023113.345257-1-mike.kravetz@oracle.com> <20231019023113.345257-3-mike.kravetz@oracle.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20231019023113.345257-3-mike.kravetz@oracle.com> X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: BD121100005 X-Stat-Signature: rs36xwi3eakyunzw6seqcoenazgcohqn X-Rspam-User: X-HE-Tag: 1697874166-558494 X-HE-Meta: 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 Qeaupcro 7kLt8Rf3/0suA3gBLGNOA64QkFlfToKwiLvoQUIr7qzNOjXRucV0l45CK2QxcPqCjorD+2A+ICEI5BIGmiUY1wMKJhtW66mfU8cpUImv7PAF4xJzr0vsw7PcUv99fs0xBG/eXYlaayh0gsFncHgd/Ic3utsVtuA9fQ5wu3PWO5kpT4sVWx5P2SdrqHchXWCJTvPxMTdAk5oNxnIzliB1ry+lpwgFbFclGSDg58O4LmWx4NKN8CGJ4FgVQCrxyixgesoZ3vwMIs10KI0rI/YVBMAPyNiafSgv+tE2cyWXJ3I+7iAI1OVUVg4fHc/pDh+3wQ6Q8HBwPMMGlgPuTXTXSTe8lJCJR0lmxm9DF23UE5dkT9KitozHxFL3IHtiVCjggvuWBv8Tn7SgMLgw= 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: On (23/10/18 19:31), Mike Kravetz wrote: > Allocation of a hugetlb page for the hugetlb pool is done by the routine > alloc_pool_huge_page. This routine will allocate contiguous pages from > a low level allocator, prep the pages for usage as a hugetlb page and > then add the resulting hugetlb page to the pool. > > In the 'prep' stage, optional vmemmap optimization is done. For > performance reasons we want to perform vmemmap optimization on multiple > hugetlb pages at once. To do this, restructure the hugetlb pool > allocation code such that vmemmap optimization can be isolated and later > batched. > > The code to allocate hugetlb pages from bootmem was also modified to > allow batching. > > No functional changes, only code restructure. > > Signed-off-by: Mike Kravetz Tested-by: Sergey Senozhatsky