[PATCH] skip increamenting nr for TASK_UNINTERRUPTIBLE

[Ajeet Yadav]

In coredump case, where thread_1 faults while thread_2 is in
TASK_UNINTERRUPTIBLE state, it cannot handle the SIGKILL.
Thus the process hangs on event.
The coredump routine freezes until the thread state is
uninterruptible.

Solution: Continue for coredump, without waiting for uninterruptible
 thread, as it will get killed as soon as it returns from
 uninterruptible state.
 Therefore do not increament thread count for threads with
 TASK_UNINTERRUPTIBLE.

Signed-off-by: Ajeet Yadav <ajeet.yadav.77@xxxxxxxxx>
Signed-off-by: Vaibhav Shinde <v.bhav.shinde@xxxxxxxxx>
---
 fs/coredump.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletions(-)

diff --git a/fs/coredump.c b/fs/coredump.c
index 447b02c..54b0664 100644
--- a/fs/coredump.c
+++ b/fs/coredump.c
@@ -281,7 +281,8 @@ static int zap_process(struct task_struct *start,
int exit_code)
  if (t != current && t->mm) {
  sigaddset(&t->pending.signal, SIGKILL);
  signal_wake_up(t, 1);
- nr++;
+ if(!(t->state & TASK_UNINTERRUPTIBLE))
+ nr++;
  }
  } while_each_thread(start, t);

-- 
1.7.9.5
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