The patch titled
Subject: hung_task: decrement sysctl_hung_task_warnings only if it is positive
has been added to the -mm tree. Its filename is
hung_task-decrement-sysctl_hung_task_warnings-only-if-it-is-positive.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/hung_task-decrement-sysctl_hung_task_warnings-only-if-it-is-positive.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/hung_task-decrement-sysctl_hung_task_warnings-only-if-it-is-positive.patch
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------------------------------------------------------
From: Tetsuo Handa <penguin-kernel@xxxxxxxxxxxxxxxxxxx>
Subject: hung_task: decrement sysctl_hung_task_warnings only if it is positive
Since sysctl_hung_task_warnings == -1 is allowed (infinite warnings),
48a6d64edadbd40f ("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@xxxxxxxxxxxxxxxxxxx>
Cc: John Siddle <jsiddle@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/hung_task.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff -puN kernel/hung_task.c~hung_task-decrement-sysctl_hung_task_warnings-only-if-it-is-positive kernel/hung_task.c
--- a/kernel/hung_task.c~hung_task-decrement-sysctl_hung_task_warnings-only-if-it-is-positive
+++ a/kernel/hung_task.c
@@ -106,7 +106,8 @@ static void check_hung_task(struct task_
* complain:
*/
if (sysctl_hung_task_warnings) {
- 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);
pr_err(" %s %s %.*s\n",
_
Patches currently in -mm which might be from penguin-kernel@xxxxxxxxxxxxxxxxxxx are
mm-remove-extra-newline-from-allocation-stall-warning.patch
hung_task-decrement-sysctl_hung_task_warnings-only-if-it-is-positive.patch
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