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kernel/hung_task.c: change hung_task.c to use for_each_process_thread() 

In check_hung_uninterruptible_tasks() avoid the use of deprecated
while_each_thread().

The "max_count" logic will prevent a livelock - see commit 0c740d0a
("introduce for_each_thread() to replace the buggy while_each_thread()").
Having said this let's use for_each_process_thread().

Signed-off-by: Aaron Tomlin <atomlin@redhat.com>
Acked-by: Oleg Nesterov <oleg@redhat.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Dave Wysochanski <dwysocha@redhat.com>
Cc: Aaron Tomlin <atomlin@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
hifive-unleashed-5.1
Aaron Tomlin 2015-04-15 16:16:47 -07:00 committed by Linus Torvalds
parent 96831c0a67
commit 972fae6993
1 changed files with 2 additions and 2 deletions
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4
kernel/hung_task.c
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@ -169,7 +169,7 @@ static void check_hung_uninterruptible_tasks(unsigned long timeout)
return;
rcu_read_lock();
do_each_thread(g, t) {
for_each_process_thread(g, t) {
if (!max_count--)
goto unlock;
if (!--batch_count) {
@ -180,7 +180,7 @@ static void check_hung_uninterruptible_tasks(unsigned long timeout)
/* use "==" to skip the TASK_KILLABLE tasks waiting on NFS */
if (t->state == TASK_UNINTERRUPTIBLE)
check_hung_task(t, timeout);
} while_each_thread(g, t);
}
unlock:
rcu_read_unlock();
}