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Diffstat (limited to 'kernel/power/process.c')
-rw-r--r--kernel/power/process.c21
1 files changed, 19 insertions, 2 deletions
diff --git a/kernel/power/process.c b/kernel/power/process.c
index 71ae29052ab6..028a99598f49 100644
--- a/kernel/power/process.c
+++ b/kernel/power/process.c
@@ -15,6 +15,7 @@
#include <linux/syscalls.h>
#include <linux/freezer.h>
#include <linux/delay.h>
+#include <linux/workqueue.h>
/*
* Timeout for stopping processes
@@ -35,6 +36,7 @@ static int try_to_freeze_tasks(bool sig_only)
struct task_struct *g, *p;
unsigned long end_time;
unsigned int todo;
+ bool wq_busy = false;
struct timeval start, end;
u64 elapsed_csecs64;
unsigned int elapsed_csecs;
@@ -42,6 +44,10 @@ static int try_to_freeze_tasks(bool sig_only)
do_gettimeofday(&start);
end_time = jiffies + TIMEOUT;
+
+ if (!sig_only)
+ freeze_workqueues_begin();
+
while (true) {
todo = 0;
read_lock(&tasklist_lock);
@@ -63,6 +69,12 @@ static int try_to_freeze_tasks(bool sig_only)
todo++;
} while_each_thread(g, p);
read_unlock(&tasklist_lock);
+
+ if (!sig_only) {
+ wq_busy = freeze_workqueues_busy();
+ todo += wq_busy;
+ }
+
if (!todo || time_after(jiffies, end_time))
break;
@@ -86,8 +98,12 @@ static int try_to_freeze_tasks(bool sig_only)
*/
printk("\n");
printk(KERN_ERR "Freezing of tasks failed after %d.%02d seconds "
- "(%d tasks refusing to freeze):\n",
- elapsed_csecs / 100, elapsed_csecs % 100, todo);
+ "(%d tasks refusing to freeze, wq_busy=%d):\n",
+ elapsed_csecs / 100, elapsed_csecs % 100,
+ todo - wq_busy, wq_busy);
+
+ thaw_workqueues();
+
read_lock(&tasklist_lock);
do_each_thread(g, p) {
task_lock(p);
@@ -157,6 +173,7 @@ void thaw_processes(void)
oom_killer_enable();
printk("Restarting tasks ... ");
+ thaw_workqueues();
thaw_tasks(true);
thaw_tasks(false);
schedule();