From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wr0-f200.google.com (mail-wr0-f200.google.com [209.85.128.200]) by kanga.kvack.org (Postfix) with ESMTP id 6C3DF6B0069 for ; Wed, 4 Oct 2017 10:16:23 -0400 (EDT) Received: by mail-wr0-f200.google.com with SMTP id g10so8608354wrg.2 for ; Wed, 04 Oct 2017 07:16:23 -0700 (PDT) Received: from mail-sor-f41.google.com (mail-sor-f41.google.com. [209.85.220.41]) by mx.google.com with SMTPS id y16sor6666100edc.22.2017.10.04.07.16.22 for (Google Transport Security); Wed, 04 Oct 2017 07:16:22 -0700 (PDT) Date: Wed, 4 Oct 2017 17:16:20 +0300 From: "Kirill A. Shutemov" Subject: Re: [PATCHv3] mm: Account pud page tables Message-ID: <20171004141620.37qojkpftpmpgmxj@node.shutemov.name> References: <20171002080427.3320-1-kirill.shutemov@linux.intel.com> <20171004134853.k2f4bah7csh6qebm@dhcp22.suse.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20171004134853.k2f4bah7csh6qebm@dhcp22.suse.cz> Sender: owner-linux-mm@kvack.org List-ID: To: Michal Hocko Cc: "Kirill A. Shutemov" , Andrew Morton , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Vlastimil Babka On Wed, Oct 04, 2017 at 03:48:53PM +0200, Michal Hocko wrote: > On Mon 02-10-17 11:04:27, Kirill A. Shutemov wrote: > > On machine with 5-level paging support a process can allocate > > significant amount of memory and stay unnoticed by oom-killer and > > memory cgroup. The trick is to allocate a lot of PUD page tables. > > We don't account PUD page tables, only PMD and PTE. > > > > We already addressed the same issue for PMD page tables, see > > dc6c9a35b66b ("mm: account pmd page tables to the process"). > > Introduction 5-level paging bring the same issue for PUD page tables. > > > > The patch expands accounting to PUD level. > > Can we skip the VmPUD part and reporting puds in the oom report please? > I would like to consolidate all levels into a single counter and carying > about one less user visible change will make it slightly easier. Or does > anybody need this exported to the userspace? Let me do this as a separate patch. I will also fold VmPMD into VmPTE. -- Kirill A. Shutemov -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org