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Fri, 3 Apr 2020 04:18:49 -0700 Received: by devbig020.ftw1.facebook.com (Postfix, from userid 179119) id E2A1358C06B4; Fri, 3 Apr 2020 04:18:47 -0700 (PDT) Smtp-Origin-Hostprefix: devbig From: Aslan Bakirov Smtp-Origin-Hostname: devbig020.ftw1.facebook.com To: CC: , , , , , , , Aslan Bakirov , Michal Hocko Smtp-Origin-Cluster: ftw1c07 Subject: [PATCH 2/2] mm: hugetlb: Use node interface of cma Date: Fri, 3 Apr 2020 04:18:12 -0700 Message-ID: <20200403111812.705955-2-aslan@fb.com> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20200403111812.705955-1-aslan@fb.com> References: <20200403111812.705955-1-aslan@fb.com> MIME-Version: 1.0 X-FB-Internal: Safe X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138,18.0.676 definitions=2020-04-03_07:2020-04-02,2020-04-03 signatures=0 X-Proofpoint-Spam-Details: rule=fb_default_notspam policy=fb_default score=0 malwarescore=0 bulkscore=0 mlxscore=0 adultscore=0 impostorscore=0 lowpriorityscore=0 priorityscore=1501 spamscore=0 suspectscore=1 mlxlogscore=999 phishscore=0 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2003020000 definitions=main-2004030099 X-FB-Internal: deliver 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: With introduction of numa node interface for CMA, this patch is for using that interface for allocating memory on numa nodes if NUMA is configured. This will be more efficient and cleaner because first, instead of iterating mem range of each numa node, cma_declare_contigueous_nid() will do its own address finding if we pass 0 for both min_pfn and max_pfn, second, it can also handle caseswhere NUMA is not configured by passing NUMA_NO_NODE as an argument. In addition, checking if desired size of memory is available or not, is happening in cma_declare_contiguous_nid() because base and limit will be determined there, since 0(any) for base and 0(any) for limit is passed as argument to the function. Signed-off-by: Aslan Bakirov Acked-by: Michal Hocko --- mm/hugetlb.c | 34 ++++++---------------------------- 1 file changed, 6 insertions(+), 28 deletions(-) diff --git a/mm/hugetlb.c b/mm/hugetlb.c index b9f0c903c4cf..8fbf11de747b 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -5573,42 +5573,20 @@ void __init hugetlb_cma_reserve(int order) reserved = 0; for_each_node_state(nid, N_ONLINE) { - unsigned long min_pfn = 0, max_pfn = 0; int res; -#ifdef CONFIG_NUMA - unsigned long start_pfn, end_pfn; - int i; - for_each_mem_pfn_range(i, nid, &start_pfn, &end_pfn, NULL) { - if (!min_pfn) - min_pfn = start_pfn; - max_pfn = end_pfn; - } -#else - min_pfn = min_low_pfn; - max_pfn = max_low_pfn; -#endif size = min(per_node, hugetlb_cma_size - reserved); size = round_up(size, PAGE_SIZE << order); - if (size > ((max_pfn - min_pfn) << PAGE_SHIFT) / 2) { - pr_warn("hugetlb_cma: cma_area is too big, please try less than %lu MiB\n", - round_down(((max_pfn - min_pfn) << PAGE_SHIFT) * - nr_online_nodes / 2 / SZ_1M, - PAGE_SIZE << order)); - break; - } - - res = cma_declare_contiguous(PFN_PHYS(min_pfn), size, - PFN_PHYS(max_pfn), + res = cma_declare_contiguous_nid(0, size, + 0, PAGE_SIZE << order, 0, false, - "hugetlb", &hugetlb_cma[nid]); + "hugetlb", &hugetlb_cma[nid], nid); + if (res) { - phys_addr_t begpa = PFN_PHYS(min_pfn); - phys_addr_t endpa = PFN_PHYS(max_pfn); - pr_warn("%s: reservation failed: err %d, node %d, [%pap, %pap)\n", - __func__, res, nid, &begpa, &endpa); + pr_warn("%s: reservation failed: err %d, node %d\n", + __func__, res, nid); break; }