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>
--
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: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
WARNING: multiple messages have this Message-ID (diff)
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>
next prev parent reply other threads:[~2015-01-14 18:27 UTC|newest]
Thread overview: 4+ 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 16:51 ` Kirill A. Shutemov
2015-01-14 18:27 ` Cyrill Gorcunov [this message]
2015-01-14 18:27 ` Cyrill Gorcunov
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20150114182700.GG2253@moon \
--to=gorcunov@gmail.com \
--cc=akpm@linux-foundation.org \
--cc=dave.hansen@linux.intel.com \
--cc=hughd@google.com \
--cc=kirill.shutemov@linux.intel.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=xemul@openvz.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.