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    Subject[PATCH 4/6] Container Freezer: Skip frozen cgroups during power management resume
    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>
    ---
    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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