From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ed1-f72.google.com (mail-ed1-f72.google.com [209.85.208.72]) by kanga.kvack.org (Postfix) with ESMTP id AD44D6B53B2 for ; Thu, 29 Nov 2018 12:15:45 -0500 (EST) Received: by mail-ed1-f72.google.com with SMTP id b7so1423046eda.10 for ; Thu, 29 Nov 2018 09:15:45 -0800 (PST) Received: from mx1.suse.de (mx2.suse.de. [195.135.220.15]) by mx.google.com with ESMTPS id l17si40505edq.20.2018.11.29.09.15.44 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 29 Nov 2018 09:15:44 -0800 (PST) Date: Thu, 29 Nov 2018 18:15:42 +0100 From: Michal Hocko Subject: Re: [PATCH v3 2/2] mm, sparse: pass nid instead of pgdat to sparse_add_one_section() Message-ID: <20181129171542.GX6923@dhcp22.suse.cz> References: <20181128091243.19249-1-richard.weiyang@gmail.com> <20181129155316.8174-1-richard.weiyang@gmail.com> <20181129155316.8174-2-richard.weiyang@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20181129155316.8174-2-richard.weiyang@gmail.com> Sender: owner-linux-mm@kvack.org List-ID: To: Wei Yang Cc: dave.hansen@intel.com, osalvador@suse.de, david@redhat.com, akpm@linux-foundation.org, linux-mm@kvack.org On Thu 29-11-18 23:53:16, Wei Yang wrote: > Since the information needed in sparse_add_one_section() is node id to > allocate proper memory, it is not necessary to pass its pgdat. > > This patch changes the prototype of sparse_add_one_section() to pass > node id directly. This is intended to reduce misleading that > sparse_add_one_section() would touch pgdat. > > Signed-off-by: Wei Yang >>From a quick look, this looks ok. Acked-by: Michal Hocko Thanks for splitting up it from the original patch. > --- > include/linux/memory_hotplug.h | 2 +- > mm/memory_hotplug.c | 2 +- > mm/sparse.c | 6 +++--- > 3 files changed, 5 insertions(+), 5 deletions(-) > > diff --git a/include/linux/memory_hotplug.h b/include/linux/memory_hotplug.h > index 45a5affcab8a..3787d4e913e6 100644 > --- a/include/linux/memory_hotplug.h > +++ b/include/linux/memory_hotplug.h > @@ -333,7 +333,7 @@ extern void move_pfn_range_to_zone(struct zone *zone, unsigned long start_pfn, > unsigned long nr_pages, struct vmem_altmap *altmap); > extern int offline_pages(unsigned long start_pfn, unsigned long nr_pages); > extern bool is_memblock_offlined(struct memory_block *mem); > -extern int sparse_add_one_section(struct pglist_data *pgdat, > +extern int sparse_add_one_section(int nid, > unsigned long start_pfn, struct vmem_altmap *altmap); > extern void sparse_remove_one_section(struct zone *zone, struct mem_section *ms, > unsigned long map_offset, struct vmem_altmap *altmap); > diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c > index f626e7e5f57b..5b3a3d7b4466 100644 > --- a/mm/memory_hotplug.c > +++ b/mm/memory_hotplug.c > @@ -253,7 +253,7 @@ static int __meminit __add_section(int nid, unsigned long phys_start_pfn, > if (pfn_valid(phys_start_pfn)) > return -EEXIST; > > - ret = sparse_add_one_section(NODE_DATA(nid), phys_start_pfn, altmap); > + ret = sparse_add_one_section(nid, phys_start_pfn, altmap); > if (ret < 0) > return ret; > > diff --git a/mm/sparse.c b/mm/sparse.c > index 5825f276485f..2472bf23278a 100644 > --- a/mm/sparse.c > +++ b/mm/sparse.c > @@ -662,7 +662,7 @@ static void free_map_bootmem(struct page *memmap) > * set. If this is <=0, then that means that the passed-in > * map was not consumed and must be freed. > */ > -int __meminit sparse_add_one_section(struct pglist_data *pgdat, > +int __meminit sparse_add_one_section(int nid, > unsigned long start_pfn, struct vmem_altmap *altmap) > { > unsigned long section_nr = pfn_to_section_nr(start_pfn); > @@ -675,11 +675,11 @@ int __meminit sparse_add_one_section(struct pglist_data *pgdat, > * no locking for this, because it does its own > * plus, it does a kmalloc > */ > - ret = sparse_index_init(section_nr, pgdat->node_id); > + ret = sparse_index_init(section_nr, nid); > if (ret < 0 && ret != -EEXIST) > return ret; > ret = 0; > - memmap = kmalloc_section_memmap(section_nr, pgdat->node_id, altmap); > + memmap = kmalloc_section_memmap(section_nr, nid, altmap); > if (!memmap) > return -ENOMEM; > usemap = __kmalloc_section_usemap(); > -- > 2.15.1 > -- Michal Hocko SUSE Labs