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Thu, 25 Mar 2021 12:45:18 +0000 (UTC) Received: from [10.36.115.72] (ovpn-115-72.ams2.redhat.com [10.36.115.72]) by smtp.corp.redhat.com (Postfix) with ESMTP id 04C1A5C3DF; Thu, 25 Mar 2021 12:45:14 +0000 (UTC) Subject: Re: [PATCH] mm/sparse: Add the missing sparse_buffer_fini() in error branch To: Wang Wensheng , akpm@linux-foundation.org, osalvador@suse.de, pasha.tatashin@oracle.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org Cc: rui.xiang@huawei.com References: <20210325113155.118574-1-wangwensheng4@huawei.com> From: David Hildenbrand Organization: Red Hat GmbH Message-ID: <1f20f644-9f51-5f0b-a162-c340912b5212@redhat.com> Date: Thu, 25 Mar 2021 13:45:13 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.8.0 MIME-Version: 1.0 In-Reply-To: <20210325113155.118574-1-wangwensheng4@huawei.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: 444E840002C4 X-Stat-Signature: gajr6xh76iqww315bunqxsset3goybyj Received-SPF: none (redhat.com>: No applicable sender policy available) receiver=imf10; identity=mailfrom; envelope-from=""; helo=us-smtp-delivery-124.mimecast.com; client-ip=63.128.21.124 X-HE-DKIM-Result: pass/pass X-HE-Tag: 1616676324-394707 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: On 25.03.21 12:31, Wang Wensheng wrote: > sparse_buffer_init() and sparse_buffer_fini() should appear in pair, or > a WARN issue would be through the next time sparse_buffer_init() runs. > > Add the missing sparse_buffer_fini() in error branch. > > Fixes: 85c77f791390 ("mm/sparse: add new sparse_init_nid() and sparse_init()") > Signed-off-by: Wang Wensheng > --- > mm/sparse.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/mm/sparse.c b/mm/sparse.c > index 7bd23f9..33406ea 100644 > --- a/mm/sparse.c > +++ b/mm/sparse.c > @@ -547,6 +547,7 @@ static void __init sparse_init_nid(int nid, unsigned long pnum_begin, > pr_err("%s: node[%d] memory map backing failed. Some memory will not be available.", > __func__, nid); > pnum_begin = pnum; > + sparse_buffer_fini(); > goto failed; > } > check_usemap_section_nr(nid, usage); > Did you actually manage to reproduce this? I would have thought that __populate_section_memmap() barely fails during boot ... Anyhow, looks like the right think to do to me Reviewed-by: David Hildenbrand -- Thanks, David / dhildenb