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Wed, 4 Jun 2025 13:25:46 GMT Received: from smtpav05.dal12v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id E28F158056; Wed, 4 Jun 2025 13:25:49 +0000 (GMT) Received: from smtpav05.dal12v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 12B8E58052; Wed, 4 Jun 2025 13:25:44 +0000 (GMT) Received: from [9.39.21.166] (unknown [9.39.21.166]) by smtpav05.dal12v.mail.ibm.com (Postfix) with ESMTP; Wed, 4 Jun 2025 13:25:43 +0000 (GMT) Message-ID: Date: Wed, 4 Jun 2025 18:55:42 +0530 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v7 1/5] drivers/base/node: Optimize memory block registration to reduce boot time To: Andrew Morton Cc: David Hildenbrand , Mike Rapoport , Oscar Salvador , Zi Yan , Greg Kroah-Hartman , Ritesh Harjani , linux-mm@kvack.org, linux-kernel@vger.kernel.org, "Rafael J . Wysocki" , Danilo Krummrich , Jonathan Cameron , Alison Schofield , Yury Norov , Dave Jiang , Madhavan Srinivasan , Nilay Shroff , linuxppc-dev@lists.ozlabs.org References: <2a0a05c2dffc62a742bf1dd030098be4ce99be28.1748452241.git.donettom@linux.ibm.com> <20250603200729.b7581e017e4ca63f502c795e@linux-foundation.org> Content-Language: en-US From: Donet Tom In-Reply-To: <20250603200729.b7581e017e4ca63f502c795e@linux-foundation.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: EbSF01bE5odkPh65mRkLZGyusm5mOC7m X-Authority-Analysis: v=2.4 cv=DYMXqutW c=1 sm=1 tr=0 ts=68404961 cx=c_pps a=3Bg1Hr4SwmMryq2xdFQyZA==:117 a=3Bg1Hr4SwmMryq2xdFQyZA==:17 a=IkcTkHD0fZMA:10 a=6IFa9wvqVegA:10 a=VnNF1IyMAAAA:8 a=w-oE209dy2xqcs4eIbgA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 X-Proofpoint-GUID: F-1tfnlDZhRpZUcrZROpJTlH7sVUQtpP X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwNjA0MDA5OSBTYWx0ZWRfXwBZBHb+c2Ct+ McEOwK31mxvwYUWFLx3Rt/bOArjqZkBjpHAYHO+84FUTyB4nyppSBCQNVTgQ3lL4NDO2Hv5JAgX WWYHgqRwsvbkHNdwIYmS8Ct3L0LqXxc27ea7x12TK04pRgI3fdcVZW6P9t+FL0YG6Tje8sPQtG1 If05/q7siRtf9WKcTJykTy+T0HH/2vY2QVqYJSG8qfhw3iT3+WeRdBgcdAkFaGMWrWotk5JnoYE XG0K9Es76TQUKULgfNGY5OEtgsCsEZ1eTGfTZVRUIekOuZG1Vd0bcOIMq4DszbrSlTaprZ0A/Vu 3g9z0S9LTu+dm3mytL1Hpmqz2qLlBfEjAtx4bCcREAlEkHRlZwD7riAA2WioXEpvUgVI4fhV7v6 eGVOEnXgki/EZ/jTbToR8DRM7DUkCQX0AipvFjcaSN6MI651asU+Pwtnj7BscCJAj2qb4XjN X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1099,Hydra:6.0.736,FMLib:17.12.80.40 definitions=2025-06-04_03,2025-06-03_02,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 lowpriorityscore=0 suspectscore=0 spamscore=0 mlxscore=0 priorityscore=1501 clxscore=1015 phishscore=0 mlxlogscore=993 adultscore=0 malwarescore=0 bulkscore=0 classifier=spam authscore=0 authtc=n/a authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2505280000 definitions=main-2506040099 X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: 43864A000C X-Stat-Signature: cp7wkj8ig1abh1zn7rppoayhtwoaubgh X-Rspam-User: X-HE-Tag: 1749043570-271224 X-HE-Meta: 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 XipvgRdx k9zeDs9MNsh0eFa5uC8O/8rXbYXl/u1YCAOLopNJUK2XBuCVmVeMh7CwCWfq9WzTyT5bef16guwbPZHks45kRjW7H+tX85SZln4G30TUBqiSScgaSsbgu6Sz8ZBeZesxenDjrt9/QYhYip8cQAzE6RFaikvSpKbA987btO5VJHOzpgTZlwsFH+PUsqE7zNN6SEwP28OBTE6RPT2QnOiTLThZoKZVzeaIK91Y3dMH6zAaKPGVylbolk2wzCvi3hgj6qTbWBzZzu6pVpeOekIG/C7H45ZoABdKb3SOpS3WBCQU5SL0GdKb+ujWCdn5mneNf/AY5VltcaGwDOFp22wCJ6pD7yAEJaEjaTGEr 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: List-Subscribe: List-Unsubscribe: On 6/4/25 8:37 AM, Andrew Morton wrote: > On Wed, 28 May 2025 12:18:00 -0500 Donet Tom wrote: > >> During node device initialization, `memory blocks` are registered under >> each NUMA node. The `memory blocks` to be registered are identified using >> the node’s start and end PFNs, which are obtained from the node's pg_data > It's quite unconventional to omit the [0/N] changelog. This omission > somewhat messed up my processes so I added a one-liner to this. Sorry, Andrew. I’ll include the cover letter in the next revision and make sure to follow this for all future patches. > >> ... >> >> Test Results on My system with 32TB RAM >> ======================================= >> 1. Boot time with CONFIG_DEFERRED_STRUCT_PAGE_INIT enabled. >> >> Without this patch >> ------------------ >> Startup finished in 1min 16.528s (kernel) >> >> With this patch >> --------------- >> Startup finished in 17.236s (kernel) - 78% Improvement > Well someone is in for a nice surprise. > >> 2. Boot time with CONFIG_DEFERRED_STRUCT_PAGE_INIT disabled. >> >> Without this patch >> ------------------ >> Startup finished in 28.320s (kernel) > what. CONFIG_DEFERRED_STRUCT_PAGE_INIT is supposed to make bootup > faster. > >