Commit 4ca5ede0 authored Dec 12, 2016 by Tetsuo Handa Committed by Linus Torvalds Dec 12, 2016

hung_task: decrement sysctl_hung_task_warnings only if it is positive



Since sysctl_hung_task_warnings == -1 is allowed (infinite warnings),
commit 48a6d64e ("hung_task: allow hung_task_panic when
hung_task_warnings is 0") should decrement it only when it is not -1.

This prevents the kernel from ceasing warnings after the first
4294967295 ;)

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Cc: John Siddle <jsiddle@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent 1270dd8d

kernel/hung_task.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -106,6 +106,7 @@ static void check_hung_task(struct task_struct *t, unsigned long timeout)
		* complain:
		*/
		if (sysctl_hung_task_warnings) {
		if (sysctl_hung_task_warnings > 0)
		sysctl_hung_task_warnings--;
		pr_err("INFO: task %s:%d blocked for more than %ld seconds.\n",
		t->comm, t->pid, timeout);

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