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| author | Li Zefan <lizefan@huawei.com> | 2013-09-23 16:43:58 +0800 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2013-09-23 11:10:49 +0200 |
| commit | cd64647f043e3fd3569bcf068f47f030198ff93a (patch) | |
| tree | c4ff621340758e4dde72ddb8c3a63d32604c0fbb /kernel/hung_task.c | |
| parent | d8524ae9d6f492a9c6db9f4d89c5f9b8782fa2d5 (diff) | |
| download | lwn-cd64647f043e3fd3569bcf068f47f030198ff93a.tar.gz lwn-cd64647f043e3fd3569bcf068f47f030198ff93a.zip | |
hung_task: Change sysctl_hung_task_check_count to 'int'
As 'sysctl_hung_task_check_count' is 'unsigned long' when this
value is assigned to max_count in check_hung_uninterruptible_tasks(),
it's truncated to 'int' type.
This causes a minor artifact: if we write 2^32 to sysctl.hung_task_check_count,
hung task detection will be effectively disabled.
With this fix, it will still truncate the user input to 32 bits, but
reading sysctl.hung_task_check_count reflects the actual truncated value.
Signed-off-by: Li Zefan <lizefan@huawei.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Link: http://lkml.kernel.org/r/523FFF4E.9050401@huawei.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/hung_task.c')
| -rw-r--r-- | kernel/hung_task.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/hung_task.c b/kernel/hung_task.c index 3e97fb126e6b..042252383fd2 100644 --- a/kernel/hung_task.c +++ b/kernel/hung_task.c @@ -20,7 +20,7 @@ /* * The number of tasks checked: */ -unsigned long __read_mostly sysctl_hung_task_check_count = PID_MAX_LIMIT; +int __read_mostly sysctl_hung_task_check_count = PID_MAX_LIMIT; /* * Limit number of tasks checked in a batch. |