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    SubjectRe: [PATCH 1/1, v9] cgroup/freezer: add per freezer duty ratio control
    On Tue, 15 Feb 2011 19:23:21 -0800
    Matt Helsley <matthltc@us.ibm.com> wrote:

    > On Tue, Feb 15, 2011 at 04:38:12PM -0800, Jacob Pan wrote:
    > > On Wed, 16 Feb 2011 01:00:15 +0100
    > > "Rafael J. Wysocki" <rjw@sisk.pl> wrote:
    >
    > <snip>
    >
    > > > Well, quite frankly, I'm not going to take this patch unless it
    > > > gets an ACK from the scheduler people (which I'm guessing is not
    > > > going to happen before hell freezes over).
    > > >
    > > > IOW, please find a better way to address the issue at hand.
    > > >
    > > We do have a real need that there is no exist feature in the kernel
    > > can provide solution for. You want ACK from scheduler people
    > > because it has impact on disabling irq? or you think scheduler
    > > should be the one that provide the solution. I did try cpu
    > > subsystem, but it seems to be limited to RT and certain scheduling
    > > policy e.g. RR and FIFO.
    >
    > I agree with Rafael. I think the scheduler should provide the solution
    > and it can be done via modifications to the cpu cgroup subsystem.
    > Yes, it only has the shares and rt-related files *right now*. However,
    > Kame replied earlier with a link to some patches for extending it
    > that introduce files with similar (granted: not the same) semantics:
    >
    > http://linux.derkeiler.com/Mailing-Lists/Kernel/2010-10/msg04335.html
    >
    > I think you could build on that and help push those patches towards
    > mainline along with your enhancements for reducing wakeups rather
    > than modify the freezer cgroup subsystem.
    >
    I will give CFS bandwidth control patches a try. See if I can be any
    help. Thanks.

    Jacob


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