From: Alan Maguire <alan.maguire@xxxxxxxxxx>
[ Upstream commit 1c024d45151b51c8f8d4749e65958b0bcf3e7c52 ]
In discussion of how to handle timeouts, it was noted that if
sysctl_hung_task_timeout_seconds is exceeded for a kunit test,
the test task will be killed and an oops generated. This should
suffice as a means of debugging such timeout issues for now.
Hence remove use of sysctl_hung_task_timeout_secs, which has the
added benefit of avoiding the need to export that symbol from
the core kernel.
Co-developed-by: Knut Omang <knut.omang@xxxxxxxxxx>
Signed-off-by: Knut Omang <knut.omang@xxxxxxxxxx>
Signed-off-by: Alan Maguire <alan.maguire@xxxxxxxxxx>
Reviewed-by: Stephen Boyd <sboyd@xxxxxxxxxx>
Acked-by: Brendan Higgins <brendanhiggins@xxxxxxxxxx>
Signed-off-by: Shuah Khan <skhan@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
lib/kunit/try-catch.c | 22 ++++------------------
1 file changed, 4 insertions(+), 18 deletions(-)
diff --git a/lib/kunit/try-catch.c b/lib/kunit/try-catch.c
index 55686839eb619..6b9c5242017f6 100644
--- a/lib/kunit/try-catch.c
+++ b/lib/kunit/try-catch.c
@@ -12,7 +12,6 @@
#include <linux/completion.h>
#include <linux/kernel.h>
#include <linux/kthread.h>
-#include <linux/sched/sysctl.h>
void __noreturn kunit_try_catch_throw(struct kunit_try_catch *try_catch)
{
@@ -31,8 +30,6 @@ static int kunit_generic_run_threadfn_adapter(void *data)
static unsigned long kunit_test_timeout(void)
{
- unsigned long timeout_msecs;
-
/*
* TODO(brendanhiggins@xxxxxxxxxx): We should probably have some type of
* variable timeout here. The only question is what that timeout value
@@ -49,22 +46,11 @@ static unsigned long kunit_test_timeout(void)
*
* For more background on this topic, see:
* https://mike-bland.com/2011/11/01/small-medium-large.html
+ *
+ * If tests timeout due to exceeding sysctl_hung_task_timeout_secs,
+ * the task will be killed and an oops generated.
*/
- if (sysctl_hung_task_timeout_secs) {
- /*
- * If sysctl_hung_task is active, just set the timeout to some
- * value less than that.
- *
- * In regards to the above TODO, if we decide on variable
- * timeouts, this logic will likely need to change.
- */
- timeout_msecs = (sysctl_hung_task_timeout_secs - 1) *
- MSEC_PER_SEC;
- } else {
- timeout_msecs = 300 * MSEC_PER_SEC; /* 5 min */
- }
-
- return timeout_msecs;
+ return 300 * MSEC_PER_SEC; /* 5 min */
}
void kunit_try_catch_run(struct kunit_try_catch *try_catch, void *context)
--
2.20.1
