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Shutemov" , Christopher Lameter , Michael Ellerman , Linus Torvalds , Gautham R Shenoy , Satheesh Rajendran , David Hildenbrand Subject: [PATCH v4 2/3] powerpc/numa: Prefer node id queried from vphn Date: Tue, 12 May 2020 18:59:36 +0530 Message-Id: <20200512132937.19295-3-srikar@linux.vnet.ibm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200512132937.19295-1-srikar@linux.vnet.ibm.com> References: <20200512132937.19295-1-srikar@linux.vnet.ibm.com> X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.216,18.0.676 definitions=2020-05-12_03:2020-05-11,2020-05-12 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 mlxlogscore=999 impostorscore=0 adultscore=0 mlxscore=0 malwarescore=0 priorityscore=1501 spamscore=0 bulkscore=0 suspectscore=0 lowpriorityscore=0 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2003020000 definitions=main-2005120094 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: Node id queried from the static device tree may not be correct. For example: it may always show 0 on a shared processor. Hence prefer the node id queried from vphn and fallback on the device tree based node id if vphn query fails. Cc: linuxppc-dev@lists.ozlabs.org Cc: linux-mm@kvack.org Cc: linux-kernel@vger.kernel.org Cc: Michal Hocko Cc: Mel Gorman Cc: Vlastimil Babka Cc: "Kirill A. Shutemov" Cc: Christopher Lameter Cc: Michael Ellerman Cc: Andrew Morton Cc: Linus Torvalds Cc: Gautham R Shenoy Cc: Satheesh Rajendran Cc: David Hildenbrand Signed-off-by: Srikar Dronamraju --- Changelog v2:->v3: - Resolved comments from Gautham. Link v2: https://lore.kernel.org/linuxppc-dev/20200428093836.27190-1-srikar@linux.vnet.ibm.com/t/#u Changelog v1:->v2: - Rebased to v5.7-rc3 arch/powerpc/mm/numa.c | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c index b3615b7..2815313 100644 --- a/arch/powerpc/mm/numa.c +++ b/arch/powerpc/mm/numa.c @@ -719,20 +719,20 @@ static int __init parse_numa_properties(void) */ for_each_present_cpu(i) { struct device_node *cpu; - int nid; - - cpu = of_get_cpu_node(i, NULL); - BUG_ON(!cpu); - nid = of_node_to_nid_single(cpu); - of_node_put(cpu); + int nid = vphn_get_nid(i); /* * Don't fall back to default_nid yet -- we will plug * cpus into nodes once the memory scan has discovered * the topology. */ - if (nid < 0) - continue; - node_set_online(nid); + if (nid == NUMA_NO_NODE) { + cpu = of_get_cpu_node(i, NULL); + BUG_ON(!cpu); + nid = of_node_to_nid_single(cpu); + of_node_put(cpu); + } + + if (likely(nid > 0)) + node_set_online(nid); } get_n_mem_cells(&n_mem_addr_cells, &n_mem_size_cells); -- 1.8.3.1