From: Vladimir Davydov <vdavydov@parallels.com>
To: <linux-kernel@vger.kernel.org>
Cc: <linux-mm@kvack.org>, <cgroups@vger.kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Tejun Heo <tj@kernel.org>, Li Zefan <lizefan@huawei.com>,
Johannes Weiner <hannes@cmpxchg.org>,
Michal Hocko <mhocko@suse.cz>, Mel Gorman <mgorman@suse.de>,
Rik van Riel <riel@redhat.com>,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
Hugh Dickins <hughd@google.com>,
David Rientjes <rientjes@google.com>,
Pavel Emelyanov <xemul@parallels.com>,
Balbir Singh <bsingharora@gmail.com>
Subject: Re: [PATCH RFC 0/5] Virtual Memory Resource Controller for cgroups
Date: Wed, 9 Jul 2014 11:52:52 +0400 [thread overview]
Message-ID: <20140709075252.GB31067@esperanza> (raw)
In-Reply-To: <cover.1404383187.git.vdavydov@parallels.com>
On Thu, Jul 03, 2014 at 04:48:16PM +0400, Vladimir Davydov wrote:
> Hi,
>
> Typically, when a process calls mmap, it isn't given all the memory pages it
> requested immediately. Instead, only its address space is grown, while the
> memory pages will be actually allocated on the first use. If the system fails
> to allocate a page, it will have no choice except invoking the OOM killer,
> which may kill this or any other process. Obviously, it isn't the best way of
> telling the user that the system is unable to handle his request. It would be
> much better to fail mmap with ENOMEM instead.
>
> That's why Linux has the memory overcommit control feature, which accounts and
> limits VM size that may contribute to mem+swap, i.e. private writable mappings
> and shared memory areas. However, currently it's only available system-wide,
> and there's no way of avoiding OOM in cgroups.
>
> This patch set is an attempt to fill the gap. It implements the resource
> controller for cgroups that accounts and limits address space allocations that
> may contribute to mem+swap.
>
> The interface is similar to the one of the memory cgroup except it controls
> virtual memory usage, not actual memory allocation:
>
> vm.usage_in_bytes current vm usage of processes inside cgroup
> (read-only)
>
> vm.max_usage_in_bytes max vm.usage_in_bytes, can be reset by writing 0
>
> vm.limit_in_bytes vm.usage_in_bytes must be <= vm.limite_in_bytes;
> allocations that hit the limit will be failed
> with ENOMEM
>
> vm.failcnt number of times the limit was hit, can be reset
> by writing 0
>
> In future, the controller can be easily extended to account for locked pages
> and shmem.
Any thoughts on this?
Thanks.
next prev parent reply other threads:[~2014-07-09 7:53 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-03 12:48 [PATCH RFC 0/5] Virtual Memory Resource Controller for cgroups Vladimir Davydov
2014-07-03 12:48 ` [PATCH RFC 1/5] vm_cgroup: basic infrastructure Vladimir Davydov
2014-07-03 12:48 ` [PATCH RFC 2/5] vm_cgroup: private writable mappings accounting Vladimir Davydov
2014-07-03 12:48 ` [PATCH RFC 3/5] shmem: pass inode to shmem_acct_* methods Vladimir Davydov
2014-07-03 12:48 ` [PATCH RFC 4/5] vm_cgroup: shared memory accounting Vladimir Davydov
2014-07-03 12:48 ` [PATCH RFC 5/5] vm_cgroup: do not charge tasks in root cgroup Vladimir Davydov
2014-07-04 12:16 ` [PATCH RFC 0/5] Virtual Memory Resource Controller for cgroups Michal Hocko
2014-07-04 15:38 ` Vladimir Davydov
2014-07-16 12:01 ` Michal Hocko
2014-07-23 14:08 ` Vladimir Davydov
2014-07-09 7:52 ` Vladimir Davydov [this message]
2014-07-09 15:08 ` Tim Hockin
2014-07-09 16:36 ` Vladimir Davydov
2014-07-09 17:04 ` Greg Thelen
2014-07-10 16:35 ` Vladimir Davydov
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