Messages in this thread Patch in this message | | | Date | Thu, 03 Apr 2008 14:03:20 -0700 | From | matthltc@us ... | Subject | [RFC PATCH 4/4] Container Freezer: Skip frozen cgroups during power management resume |
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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> Tested-by: Matt Helsley <matthltc@us.ibm.com> Cc: linux-pm@lists.linux-foundation.org --- kernel/power/process.c | 4 ++++ 1 file changed, 4 insertions(+)
Index: linux-2.6.25-rc5-mm1/kernel/power/process.c =================================================================== --- linux-2.6.25-rc5-mm1.orig/kernel/power/process.c +++ linux-2.6.25-rc5-mm1/kernel/power/process.c @@ -11,10 +11,11 @@ #include <linux/interrupt.h> #include <linux/suspend.h> #include <linux/module.h> #include <linux/syscalls.h> #include <linux/freezer.h> +#include <linux/cgroup_freezer.h> /* * Timeout for stopping processes */ #define TIMEOUT (20 * HZ) @@ -150,10 +151,13 @@ static void thaw_tasks(int thaw_user_spa continue; if (!p->mm == thaw_user_space) continue; + if (cgroup_frozen(p)) + continue; + thaw_process(p); } while_each_thread(g, p); read_unlock(&tasklist_lock); } --
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