From: "Kirill A. Shutemov" <kirill@shutemov.name>
To: Glauber Costa <glommer@parallels.com>
Cc: linux-kernel@vger.kernel.org, paul@paulmenage.org,
lizf@cn.fujitsu.com, kamezawa.hiroyu@jp.fujitsu.com,
ebiederm@xmission.com, davem@davemloft.net, gthelen@google.com,
netdev@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [PATCH v2 1/7] Basic kernel memory functionality for the Memory Controller
Date: Sun, 18 Sep 2011 22:05:09 +0300 [thread overview]
Message-ID: <20110918190509.GC28057@shutemov.name> (raw)
In-Reply-To: <4E7567E0.9010401@parallels.com>
On Sun, Sep 18, 2011 at 12:39:12AM -0300, Glauber Costa wrote:
> > No kernel memory accounting for root cgroup, right?
> Not sure. Maybe kernel memory accounting is useful even for root cgroup.
> Same as normal memory accounting... what we want to avoid is kernel
> memory limits. OTOH, if we are not limiting it anyway, accounting it is
> just useless overhead... Even the statistics can then be gathered
> through all
> the proc files that show slab usage, I guess?
It's better to leave root cgroup without accounting. At least for now.
We can add it later if needed.
> >
> >> @@ -3979,6 +3999,10 @@ static u64 mem_cgroup_read(struct cgroup *cont, struct cftype *cft)
> >> else
> >> val = res_counter_read_u64(&mem->memsw, name);
> >> break;
> >> + case _KMEM:
> >> + val = res_counter_read_u64(&mem->kmem, name);
> >> + break;
> >> +
> >
> > Always zero in root cgroup?
>
> Yes, if we're not accounting, it should be zero. WARN_ON, maybe?
-ENOSYS?
--
Kirill A. Shutemov
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next prev parent reply other threads:[~2011-09-18 19:05 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-15 1:46 [PATCH v2 0/7] per-cgroup tcp buffer pressure settings Glauber Costa
2011-09-15 1:46 ` [PATCH v2 1/7] Basic kernel memory functionality for the Memory Controller Glauber Costa
2011-09-17 17:45 ` Kirill A. Shutemov
2011-09-18 3:39 ` Glauber Costa
2011-09-18 19:05 ` Kirill A. Shutemov [this message]
2011-09-18 19:11 ` Glauber Costa
2011-09-18 20:39 ` Kirill A. Shutemov
2011-09-18 20:40 ` Glauber Costa
2011-09-18 20:43 ` Kirill A. Shutemov
2011-09-15 1:46 ` [PATCH v2 2/7] socket: initial cgroup code Glauber Costa
2011-09-17 17:52 ` Kirill A. Shutemov
2011-09-18 3:32 ` Glauber Costa
2011-09-18 18:58 ` Kirill A. Shutemov
2011-09-15 1:46 ` [PATCH v2 3/7] foundations of per-cgroup memory pressure controlling Glauber Costa
2011-09-15 1:46 ` [PATCH v2 4/7] per-cgroup tcp buffers control Glauber Costa
2011-09-17 18:11 ` Kirill A. Shutemov
2011-09-17 18:33 ` Cyrill Gorcunov
2011-09-18 3:32 ` Glauber Costa
2011-09-18 18:58 ` Kirill A. Shutemov
2011-09-18 19:42 ` Glauber Costa
2011-09-28 11:58 ` Andrew Wagin
2011-09-28 12:11 ` Glauber Costa
2011-09-15 1:46 ` [PATCH v2 5/7] per-netns ipv4 sysctl_tcp_mem Glauber Costa
2011-09-15 1:46 ` [PATCH v2 6/7] tcp buffer limitation: per-cgroup limit Glauber Costa
2011-09-17 12:12 ` Glauber Costa
2011-09-15 1:46 ` [PATCH v2 7/7] Display current tcp memory allocation in kmem cgroup Glauber Costa
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