linux-kernel - Re: [PATCH v2] netfilter: account ebt_table

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Date:   Thu, 3 Jan 2019 03:14:56 -0700
From:   William Kucharski <william.kucharski@...cle.com>
To:     Shakeel Butt <shakeelb@...gle.com>
Cc:     Michal Hocko <mhocko@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Florian Westphal <fw@...len.de>,
        Kirill Tkhai <ktkhai@...tuozzo.com>,
        Linux-MM <linux-mm@...ck.org>,
        LKML <linux-kernel@...r.kernel.org>,
        syzbot+7713f3aa67be76b1552c@...kaller.appspotmail.com,
        Pablo Neira Ayuso <pablo@...filter.org>,
        Jozsef Kadlecsik <kadlec@...ckhole.kfki.hu>,
        Roopa Prabhu <roopa@...ulusnetworks.com>,
        Nikolay Aleksandrov <nikolay@...ulusnetworks.com>,
        netfilter-devel@...r.kernel.org, coreteam@...filter.org,
        bridge@...ts.linux-foundation.org
Subject: Re: [PATCH v2] netfilter: account ebt_table_info to kmemcg



> On Jan 2, 2019, at 8:14 PM, Shakeel Butt <shakeelb@...gle.com> wrote:
> 
> 	countersize = COUNTER_OFFSET(tmp.nentries) * nr_cpu_ids;
> -	newinfo = vmalloc(sizeof(*newinfo) + countersize);
> +	newinfo = __vmalloc(sizeof(*newinfo) + countersize, GFP_KERNEL_ACCOUNT,
> +			    PAGE_KERNEL);
> 	if (!newinfo)
> 		return -ENOMEM;
> 
> 	if (countersize)
> 		memset(newinfo->counters, 0, countersize);
> 
> -	newinfo->entries = vmalloc(tmp.entries_size);
> +	newinfo->entries = __vmalloc(tmp.entries_size, GFP_KERNEL_ACCOUNT,
> +				     PAGE_KERNEL);
> 	if (!newinfo->entries) {
> 		ret = -ENOMEM;
> 		goto free_newinfo;
> -- 

Just out of curiosity, what are the actual sizes of these areas in typical use
given __vmalloc() will be allocating by the page?