* [PATCH] sched/debug,sched/core: Reset hung task detector while processing sysrq-t
@ 2023-06-07 18:09 Qingjie Xing
0 siblings, 0 replies; 3+ messages in thread
From: Qingjie Xing @ 2023-06-07 18:09 UTC (permalink / raw
To: mingo
Cc: peterz, juri.lelli, vincent.guittot, dietmar.eggemann, rostedt,
bsegall, mgorman, bristot, vschneid, brauner, linux-kernel,
xqjcool
On devices with multiple CPUs and multiple processes, outputting lengthy
sysrq-t content on a slow serial port can consume a significant amount
of time. We need to reset the hung task detector to avoid false hung task
alerts.
Signed-off-by: Qingjie Xing <xqjcool@gmail.com>
---
kernel/sched/core.c | 1 +
kernel/sched/debug.c | 1 +
2 files changed, 2 insertions(+)
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index a68d1276bab0..5773283b752c 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -9176,6 +9176,7 @@ void show_state_filter(unsigned int state_filter)
*/
touch_nmi_watchdog();
touch_all_softlockup_watchdogs();
+ reset_hung_task_detector();
if (state_filter_match(state_filter, p))
sched_show_task(p);
}
diff --git a/kernel/sched/debug.c b/kernel/sched/debug.c
index 0b2340a79b65..43065808b425 100644
--- a/kernel/sched/debug.c
+++ b/kernel/sched/debug.c
@@ -904,6 +904,7 @@ void sysrq_sched_debug_show(void)
*/
touch_nmi_watchdog();
touch_all_softlockup_watchdogs();
+ reset_hung_task_detector();
print_cpu(NULL, cpu);
}
}
--
2.40.1
^ permalink raw reply related [flat|nested] 3+ messages in thread
* [PATCH] sched/debug,sched/core: Reset hung task detector while processing sysrq-t
@ 2023-06-07 18:12 Qingjie Xing
0 siblings, 0 replies; 3+ messages in thread
From: Qingjie Xing @ 2023-06-07 18:12 UTC (permalink / raw
To: mingo
Cc: peterz, juri.lelli, vincent.guittot, dietmar.eggemann, rostedt,
bsegall, mgorman, bristot, vschneid, brauner, linux-kernel,
xqjcool
On devices with multiple CPUs and multiple processes, outputting lengthy
sysrq-t content on a slow serial port can consume a significant amount
of time. We need to reset the hung task detector to avoid false hung task
alerts.
Signed-off-by: Qingjie Xing <xqjcool@gmail.com>
---
kernel/sched/core.c | 1 +
kernel/sched/debug.c | 1 +
2 files changed, 2 insertions(+)
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index a68d1276bab0..5773283b752c 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -9176,6 +9176,7 @@ void show_state_filter(unsigned int state_filter)
*/
touch_nmi_watchdog();
touch_all_softlockup_watchdogs();
+ reset_hung_task_detector();
if (state_filter_match(state_filter, p))
sched_show_task(p);
}
diff --git a/kernel/sched/debug.c b/kernel/sched/debug.c
index 0b2340a79b65..43065808b425 100644
--- a/kernel/sched/debug.c
+++ b/kernel/sched/debug.c
@@ -904,6 +904,7 @@ void sysrq_sched_debug_show(void)
*/
touch_nmi_watchdog();
touch_all_softlockup_watchdogs();
+ reset_hung_task_detector();
print_cpu(NULL, cpu);
}
}
--
2.40.1
^ permalink raw reply related [flat|nested] 3+ messages in thread
* [PATCH] sched/debug,sched/core: Reset hung task detector while processing sysrq-t
@ 2023-06-07 18:21 Qingjie Xing
0 siblings, 0 replies; 3+ messages in thread
From: Qingjie Xing @ 2023-06-07 18:21 UTC (permalink / raw
To: mingo
Cc: peterz, juri.lelli, vincent.guittot, dietmar.eggemann, rostedt,
bsegall, mgorman, bristot, vschneid, brauner, linux-kernel,
xqjcool
On devices with multiple CPUs and multiple processes, outputting lengthy
sysrq-t content on a slow serial port can consume a significant amount
of time. We need to reset the hung task detector to avoid false hung task
alerts.
Signed-off-by: Qingjie Xing <xqjcool@gmail.com>
---
kernel/sched/core.c | 1 +
kernel/sched/debug.c | 1 +
2 files changed, 2 insertions(+)
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index a68d1276bab0..5773283b752c 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -9176,6 +9176,7 @@ void show_state_filter(unsigned int state_filter)
*/
touch_nmi_watchdog();
touch_all_softlockup_watchdogs();
+ reset_hung_task_detector();
if (state_filter_match(state_filter, p))
sched_show_task(p);
}
diff --git a/kernel/sched/debug.c b/kernel/sched/debug.c
index 0b2340a79b65..43065808b425 100644
--- a/kernel/sched/debug.c
+++ b/kernel/sched/debug.c
@@ -904,6 +904,7 @@ void sysrq_sched_debug_show(void)
*/
touch_nmi_watchdog();
touch_all_softlockup_watchdogs();
+ reset_hung_task_detector();
print_cpu(NULL, cpu);
}
}
--
2.40.1
^ permalink raw reply related [flat|nested] 3+ messages in thread
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