Dear All, We found below issue in coredump for uninterruptible task -
>From 1c46f0327d98ad593d8913f9f1dad352f8f44304 Mon Sep 17 00:00:00 2001 From: Ajeet Yadav <ajeet.yadav...@gmail.com> Date: Sat, 21 Dec 2013 17:06:05 +0530 Subject: [PATCH] skip increamenting nr for TASK_UNINTERRUPTIBLE 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...@gmail.com> Signed-off-by: Vaibhav Shinde <v.bhav.shi...@gmail.com> --- 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/