From: Cyrill Gorcunov <gorcunov@gmail.com>
To: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Hugh Dickins <hughd@google.com>,
linux-mm@kvack.org, Dave Hansen <dave.hansen@linux.intel.com>,
Pavel Emelyanov <xemul@openvz.org>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] mm: account pmd page tables to the process
Date: Wed, 14 Jan 2015 21:27:00 +0300 [thread overview]
Message-ID: <20150114182700.GG2253@moon> (raw)
In-Reply-To: <1421254316-190596-1-git-send-email-kirill.shutemov@linux.intel.com>
On Wed, Jan 14, 2015 at 06:51:56PM +0200, Kirill A. Shutemov wrote:
> Dave noticed that unprivileged process can allocate significant amount
> of memory -- >500 MiB on x86_64 -- and stay unnoticed by oom-killer and
> memory cgroup. The trick is to allocate a lot of PMD page tables. Linux
> kernel doesn't account PMD tables to the process, only PTE.
>
> The use-cases below use few tricks to allocate a lot of PMD page tables
> while keeping VmRSS and VmPTE low. oom_score for the process will be 0.
Reviewed-by: Cyrill Gorcunov <gorcunov@openvz.org>
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prev parent reply other threads:[~2015-01-14 18:27 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-14 16:51 [PATCH] mm: account pmd page tables to the process Kirill A. Shutemov
2015-01-14 18:27 ` Cyrill Gorcunov [this message]
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