From: "Kirill A. Shutemov" <kirill@shutemov.name>
To: Michal Hocko <mhocko@kernel.org>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
Andrew Morton <akpm@linux-foundation.org>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Vlastimil Babka <vbabka@suse.cz>
Subject: Re: [PATCHv3] mm: Account pud page tables
Date: Wed, 4 Oct 2017 17:16:20 +0300 [thread overview]
Message-ID: <20171004141620.37qojkpftpmpgmxj@node.shutemov.name> (raw)
In-Reply-To: <20171004134853.k2f4bah7csh6qebm@dhcp22.suse.cz>
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
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next prev parent reply other threads:[~2017-10-04 14:16 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-02 8:04 Kirill A. Shutemov
2017-10-03 19:59 ` Rik van Riel
2017-10-04 6:03 ` Vlastimil Babka
2017-10-04 7:43 ` Kirill A. Shutemov
2017-10-04 13:48 ` Michal Hocko
2017-10-04 14:16 ` Kirill A. Shutemov [this message]
2017-10-04 14:28 ` Michal Hocko
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