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Fri, 16 May 2025 10:58:31 GMT Received: from smtpav04.dal12v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 5B4A158056; Fri, 16 May 2025 10:58:31 +0000 (GMT) Received: from smtpav04.dal12v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 7DC5358052; Fri, 16 May 2025 10:58:26 +0000 (GMT) Received: from [9.109.245.113] (unknown [9.109.245.113]) by smtpav04.dal12v.mail.ibm.com (Postfix) with ESMTP; Fri, 16 May 2025 10:58:26 +0000 (GMT) Message-ID: Date: Fri, 16 May 2025 16:28:24 +0530 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v4 3/4] Remove register_memory_blocks_under_node() function call from register_one_node To: David Hildenbrand , Andrew Morton , Mike Rapoport , Oscar Salvador , Zi Yan Cc: Ritesh Harjani , rafael@kernel.org, Danilo Krummrich , Greg Kroah-Hartman , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Jonathan Cameron , Alison Schofield , Yury Norov , Dave Jiang References: Content-Language: en-US From: Donet Tom In-Reply-To: Content-Type: text/plain; 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At this stage, the >> node has >> not yet had any memory added. As a result, there are no memory blocks to >> walk or register, so calling register_memory_blocks_under_node() is >> unnecessary. Therefore, the call to register_memory_blocks_under_node() >> has been removed from register_one_node(). > > It might help to throw in some empty lines to make this easier to read. > > Patch subject should start with something like > > "node:" or "mm:" Sorry. I missed it. I will add it in the next version. > >> >> Signed-off-by: Donet Tom >> >> --- >> v3->v4 >> >> Addressed Mike's comment by dropping the call to >> register_memory_blocks_under_node() from register_one_node() >> >> v3 - >> https://lore.kernel.org/all/b49ed289096643ff5b5fbedcf1d1c1be42845a74.1746250339.git.donettom@linux.ibm.com/ >> v2 - >> https://lore.kernel.org/all/fbe1e0c7d91bf3fa9a64ff5d84b53ded1d0d5ac7.1745852397.git.donettom@linux.ibm.com/ >> v1 - >> https://lore.kernel.org/all/50142a29010463f436dc5c4feb540e5de3bb09df.1744175097.git.donettom@linux.ibm.com/ >> --- >>   include/linux/node.h | 6 ------ >>   1 file changed, 6 deletions(-) >> >> diff --git a/include/linux/node.h b/include/linux/node.h >> index 806e62638cbe..8b8f96ca5b06 100644 >> --- a/include/linux/node.h >> +++ b/include/linux/node.h >> @@ -137,15 +137,9 @@ static inline int register_one_node(int nid) >>       int error = 0; >>         if (node_online(nid)) { >> -        struct pglist_data *pgdat = NODE_DATA(nid); >> -        unsigned long start_pfn = pgdat->node_start_pfn; >> -        unsigned long end_pfn = start_pfn + pgdat->node_spanned_pages; >> - >>           error = __register_one_node(nid); >>           if (error) >>               return error; >> -        register_memory_blocks_under_node(nid, start_pfn, end_pfn, >> -                          MEMINIT_EARLY); >>       } > > Can be further simplified > > if (node_online(nid)) >     error = __register_one_node(nid); > return error; Thanks. I will add it and it in the next version. > >>         return error; > >