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    SubjectRe: [PATCH 4/6] Container Freezer: Skip frozen cgroups during power management resume
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    Hi.

    On Thu, 2008-07-31 at 22:07 -0700, Matt Helsley wrote:
    > When a system is resumed after a suspend, it will also unfreeze
    > frozen cgroups.
    >
    > This patchs modifies the resume sequence to skip the tasks which
    > are part of a frozen control group.
    >
    > Signed-off-by: Cedric Le Goater <clg@fr.ibm.com>
    > Signed-off-by: Matt Helsley <matthltc@us.ibm.com>
    > Acked-by: Serge E. Hallyn <serue@us.ibm.com>
    > Tested-by: Matt Helsley <matthltc@us.ibm.com>

    I understand the freezer pretty well, so maybe I can help a little.

    Acked-by: Nigel Cunningham <nigel@tuxonice.net>

    > ---
    > kernel/power/process.c | 4 ++++
    > 1 files changed, 4 insertions(+), 0 deletions(-)
    >
    > diff --git a/kernel/power/process.c b/kernel/power/process.c
    > index 444cea8..ce9e280 100644
    > --- a/kernel/power/process.c
    > +++ b/kernel/power/process.c
    > @@ -13,6 +13,7 @@
    > #include <linux/module.h>
    > #include <linux/syscalls.h>
    > #include <linux/freezer.h>
    > +#include <linux/cgroup_freezer.h>
    >
    > /*
    > * Timeout for stopping processes
    > @@ -135,6 +136,9 @@ static void thaw_tasks(bool nosig_only)
    > if (nosig_only && should_send_signal(p))
    > continue;
    >
    > + if (cgroup_frozen(p))
    > + continue;
    > +
    > thaw_process(p);
    > } while_each_thread(g, p);
    > read_unlock(&tasklist_lock);
    > --
    > 1.5.3.7
    >



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