LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: "Paul Menage" <menage@google.com>
To: vatsa@in.ibm.com
Cc: balbir@linux.vnet.ibm.com, linux-kernel@vger.kernel.org,
	ckrm-tech@lists.sourceforge.net, balbir@in.ibm.com,
	haveblue@us.ibm.com, xemul@sw.ru, dev@sw.ru,
	rohitseth@google.com, pj@sgi.com, ebiederm@xmission.com,
	mbligh@google.com, containers@lists.osdl.org, serue@us.ibm.com,
	akpm@linux-foundation.org, svaidy@linux.vnet.ibm.com,
	devel@openvz.org
Subject: Re: [ckrm-tech] [PATCH 3/9] Containers (V9): Add tasks file interface
Date: Tue, 1 May 2007 20:25:35 -0700	[thread overview]
Message-ID: <6599ad830705012025r64eed906sebe4b38d9977c036@mail.gmail.com> (raw)
In-Reply-To: <20070502032541.GA7311@in.ibm.com>

On 5/1/07, Srivatsa Vaddagiri <vatsa@in.ibm.com> wrote:
>
> For the CPU controller I was working on, (a fast access to) such a list would
> have been valuable. Basically each task has a weight associated with it
> (p->load_weight) which is made to depend upon its class limit. Whenever
> the class limit changes, we need to go and change all its member task's
> ->load_weight value.
>
> If you don't maintain the per-container task list, I guess I could still
> work around it, by either:
>
>         - Walk the task table and find relevant members

That doesn't seem like a terrible solution to me, unless you expect
the class limit to be changing incredibly frequently.

If we had multiple subsystems that needed to walk the container member
list on a fast-path operation (e.g. to make a scheduling decision)
that would be a good reason to maintain such a list.

>           perhaps
>         - Move p->load_weight to a class structure

Sounds like a good idea if you can do it - but if it's per-process,
how would it fit in the class structure?

Paul

  reply	other threads:[~2007-05-02  3:25 UTC|newest]

Thread overview: 36+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-04-27 10:46 [PATCH 0/9] Containers (V9): Generic Process Containers menage
2007-04-27 10:46 ` [PATCH 1/9] Containers (V9): Basic container framework menage
2007-04-29  3:12   ` [ckrm-tech] " Paul Jackson
2007-05-01 17:40   ` Balbir Singh
2007-05-01 17:46     ` Paul Menage
2007-05-01 18:40     ` [ckrm-tech] " Paul Jackson
2007-05-02  3:44       ` Balbir Singh
2007-05-02  6:12         ` Paul Jackson
2007-05-10  4:09           ` Balbir Singh
2007-05-10  4:47             ` Paul Jackson
2007-05-10  4:49               ` Balbir Singh
2007-04-27 10:46 ` [PATCH 2/9] Containers (V9): Example CPU accounting subsystem menage
2007-05-01 17:52   ` Balbir Singh
2007-04-27 10:46 ` [PATCH 3/9] Containers (V9): Add tasks file interface menage
2007-05-01 18:12   ` Balbir Singh
2007-05-01 20:37     ` [ckrm-tech] " Paul Menage
2007-05-02  3:25       ` Srivatsa Vaddagiri
2007-05-02  3:25         ` Paul Menage [this message]
2007-05-02  3:46           ` Srivatsa Vaddagiri
2007-05-08 14:51           ` Balbir Singh
2007-05-10 21:21             ` Paul Menage
2007-05-11  2:31               ` Balbir Singh
2007-05-02  3:58       ` Balbir Singh
2007-04-27 10:46 ` [PATCH 4/9] Containers (V9): Add fork/exit hooks menage
2007-04-27 10:46 ` [PATCH 5/9] Containers (V9): Add container_clone() interface menage
2007-04-27 10:46 ` [PATCH 6/9] Containers (V9): Add procfs interface menage
2007-04-27 10:46 ` [PATCH 7/9] Containers (V9): Make cpusets a client of containers menage
2007-04-27 10:46 ` [PATCH 8/9] Containers (V9): Share css_group arrays between tasks with same container memberships menage
2007-04-27 10:46 ` [PATCH 9/9] Containers (V9): Simple debug info subsystem menage
2007-04-29  1:47 ` [PATCH 0/9] Containers (V9): Generic Process Containers Paul Jackson
2007-04-29  9:37 ` Paul Jackson
2007-04-30 17:12   ` Srivatsa Vaddagiri
2007-04-30 17:09     ` Paul Menage
2007-04-30 18:06       ` Srivatsa Vaddagiri
2007-04-30 17:23     ` Christoph Hellwig
2007-04-30 18:16       ` [ckrm-tech] " Srivatsa Vaddagiri

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=6599ad830705012025r64eed906sebe4b38d9977c036@mail.gmail.com \
    --to=menage@google.com \
    --cc=akpm@linux-foundation.org \
    --cc=balbir@in.ibm.com \
    --cc=balbir@linux.vnet.ibm.com \
    --cc=ckrm-tech@lists.sourceforge.net \
    --cc=containers@lists.osdl.org \
    --cc=dev@sw.ru \
    --cc=devel@openvz.org \
    --cc=ebiederm@xmission.com \
    --cc=haveblue@us.ibm.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=mbligh@google.com \
    --cc=pj@sgi.com \
    --cc=rohitseth@google.com \
    --cc=serue@us.ibm.com \
    --cc=svaidy@linux.vnet.ibm.com \
    --cc=vatsa@in.ibm.com \
    --cc=xemul@sw.ru \
    --subject='Re: [ckrm-tech] [PATCH 3/9] Containers (V9): Add tasks file interface' \
    /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

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).