From: Glauber Costa <glommer@parallels.com>
To: Paul Menage <paul@paulmenage.org>
Cc: Greg Thelen <gthelen@google.com>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
containers@lists.osdl.org, netdev@vger.kernel.org,
xemul@parallels.com, "David S. Miller" <davem@davemloft.net>,
Hiroyouki Kamezawa <kamezawa.hiroyu@jp.fujitsu.com>,
"Eric W. Biederman" <ebiederm@xmission.com>,
Suleiman Souhlal <suleiman@google.com>,
Lennart Poettering <lennart@poettering.net>
Subject: Re: [PATCH] per-cgroup tcp buffer limitation
Date: Tue, 13 Sep 2011 15:11:16 -0300 [thread overview]
Message-ID: <4E6F9CC4.2000601@parallels.com> (raw)
In-Reply-To: <CALdu-PC7ESSUHuF4vfVoRFFfkaBt1V28rGW3-O5pT3WtegAh4g@mail.gmail.com>
On 09/13/2011 03:09 PM, Paul Menage wrote:
> Each set of counters (user, kernel, total) will have its own locks,
> contention and other overheads to keep up to date. If userspace
> doesn't care about one or two of the three, then that's mostly wasted.
>
> Now it might be that the accounting of all three can be done with
> little more overhead than that required to update just a split view or
> just a unified view, in which case there's much less argument against
> simplifying and tracking/charging/limiting all three.
What if they are all updated under the same lock ?
The lock argument is very well valid for accounting vs not accounting
kernel memory. But once it is accounted, which counter we account to, I
think, is less of a problem.
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next prev parent reply other threads:[~2011-09-13 18:12 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-06 2:35 [PATCH] per-cgroup tcp buffer limitation Glauber Costa
2011-09-06 10:00 ` KAMEZAWA Hiroyuki
2011-09-06 15:28 ` Glauber Costa
2011-09-06 22:52 ` Glauber Costa
2011-09-06 16:08 ` Greg Thelen
2011-09-06 16:16 ` Glauber Costa
2011-09-06 22:12 ` Greg Thelen
2011-09-06 22:37 ` Glauber Costa
2011-09-07 21:35 ` Greg Thelen
2011-09-08 4:44 ` Glauber Costa
2011-09-08 21:53 ` Greg Thelen
2011-09-09 4:17 ` Glauber Costa
2011-09-09 23:38 ` Greg Thelen
2011-09-12 16:30 ` Glauber Costa
2011-09-12 5:03 ` Paul Menage
2011-09-12 16:57 ` Glauber Costa
2011-09-13 6:56 ` Greg Thelen
2011-09-13 18:09 ` Paul Menage
2011-09-13 18:11 ` Glauber Costa [this message]
2011-09-13 18:46 ` Paul Menage
2011-09-13 19:08 ` Glauber Costa
2011-09-07 2:38 ` Eric Dumazet
2011-09-07 1:08 ` Paul Menage
2011-09-07 1:09 ` Glauber Costa
2011-09-07 1:29 ` Paul Menage
2011-09-07 1:32 ` Glauber Costa
2011-09-09 0:18 ` Rick Jones
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