From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 956886465 for ; Tue, 22 Mar 2022 21:47:07 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5F9C2C340F2; Tue, 22 Mar 2022 21:47:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1647985627; bh=fDWYER1e+boei8jJvhe+8X1MXU40/XACDM3uTEQN10E=; h=Date:To:From:In-Reply-To:Subject:From; b=u9VBJllCl8ZZR0MU5ydVooFBMMawP6BKJ1SwOjOavnzhoZpNvuSDz2rX5+jT2AYJg A6djqbGX4xRIMC6kxKeX+h6nCbKLljgwfrlm2R5KRhlJD+mb9VdIEu+IA1DYoNywnh 9sxYAbpu8RMdvNrENfGyyZIy4YHt1iOZ4fbLCGtA= Date: Tue, 22 Mar 2022 14:47:06 -0700 To: tj@kernel.org,rppt@linux.ibm.com,raquini@redhat.com,osalvador@suse.de,npache@redhat.com,mhocko@suse.com,eric.dumazet@gmail.com,dennis@kernel.org,david@redhat.com,cl@linux.com,amakhalov@vmware.com,richard.weiyang@gmail.com,akpm@linux-foundation.org,patches@lists.linux.dev,linux-mm@kvack.org,mm-commits@vger.kernel.org,torvalds@linux-foundation.org,akpm@linux-foundation.org From: Andrew Morton In-Reply-To: <20220322143803.04a5e59a07e48284f196a2f9@linux-foundation.org> Subject: [patch 169/227] memcg: do not tweak node in alloc_mem_cgroup_per_node_info Message-Id: <20220322214707.5F9C2C340F2@smtp.kernel.org> Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: From: Wei Yang Subject: memcg: do not tweak node in alloc_mem_cgroup_per_node_info alloc_mem_cgroup_per_node_info is allocated for each possible node and this used to be a problem because !node_online nodes didn't have appropriate data structure allocated. This has changed by "mm: handle uninitialized numa nodes gracefully" so we can drop the special casing here. Link: https://lkml.kernel.org/r/20220127085305.20890-7-mhocko@kernel.org Signed-off-by: Wei Yang Signed-off-by: Michal Hocko Cc: David Hildenbrand Cc: Alexey Makhalov Cc: Dennis Zhou Cc: Eric Dumazet Cc: Tejun Heo Cc: Christoph Lameter Cc: Nico Pache Cc: Wei Yang Cc: Mike Rapoport Cc: Oscar Salvador Cc: Rafael Aquini Signed-off-by: Andrew Morton --- mm/memcontrol.c | 14 ++------------ 1 file changed, 2 insertions(+), 12 deletions(-) --- a/mm/memcontrol.c~memcg-do-not-tweak-node-in-alloc_mem_cgroup_per_node_info +++ a/mm/memcontrol.c @@ -5020,18 +5020,8 @@ struct mem_cgroup *mem_cgroup_from_id(un static int alloc_mem_cgroup_per_node_info(struct mem_cgroup *memcg, int node) { struct mem_cgroup_per_node *pn; - int tmp = node; - /* - * This routine is called against possible nodes. - * But it's BUG to call kmalloc() against offline node. - * - * TODO: this routine can waste much memory for nodes which will - * never be onlined. It's better to use memory hotplug callback - * function. - */ - if (!node_state(node, N_NORMAL_MEMORY)) - tmp = -1; - pn = kzalloc_node(sizeof(*pn), GFP_KERNEL, tmp); + + pn = kzalloc_node(sizeof(*pn), GFP_KERNEL, node); if (!pn) return 1; _