tmakin/ack-tegra
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

ANDROID: hung_task: Add vendor hook for hung task detect

Browse Source 
Add vendor hook for hung task detect, so we can decide which
threads need to check, avoiding false alarms.

Bug: 188684133
Change-Id: I5d7dfeb071cbfda8121134c38a458202aaa3a8c6
Signed-off-by: Huang Yiwei <hyiwei@codeaurora.org>
[xuewen: minor conflicts fixups]
Signed-off-by: Xuewen Yan <xuewen.yan@unisoc.com>
This commit is contained in:
Huang Yiwei
2021-04-07 17:08:00 +08:00
committed by Xuewen Yan
parent 407ebc2cb0
commit 73b3806ea1
3 changed files with 37 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files
drivers/android/vendor_hooks.c
+3
View File
@@ -36,6 +36,7 @@
#include <trace/hooks/timer.h>
#include <trace/hooks/fpsimd.h>
#include <trace/hooks/dtask.h>
#include <trace/hooks/hung_task.h>
#include <trace/hooks/ftrace_dump.h>
#include <trace/hooks/mm.h>
#include <trace/hooks/traps.h>
@@ -107,6 +108,8 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_rproc_recovery_set);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_timer_calc_index);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_is_fpsimd_save);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_sched_show_task);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_check_uninterruptible_tasks);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_check_uninterruptible_tasks_dn);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_ftrace_format_check);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_mem_cgroup_free);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_mem_cgroup_alloc);
include/trace/hooks/hung_task.h
+23
View File
@@ -0,0 +1,23 @@
/* SPDX-License-Identifier: GPL-2.0 */
#undef TRACE_SYSTEM
#define TRACE_SYSTEM hung_task
#define TRACE_INCLUDE_PATH trace/hooks
#if !defined(_TRACE_HOOK_HUNG_TASK_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_HOOK_HUNG_TASK_H
#include <trace/hooks/vendor_hooks.h>
DECLARE_HOOK(android_vh_check_uninterruptible_tasks,
TP_PROTO(struct task_struct *t, unsigned long timeout,
bool *need_check),
TP_ARGS(t, timeout, need_check));
DECLARE_HOOK(android_vh_check_uninterruptible_tasks_dn,
TP_PROTO(void *unused),
TP_ARGS(unused));
#endif /* _TRACE_HOOK_HUNG_TASK_H */
/* This part must be outside protection */
#include <trace/define_trace.h>
kernel/hung_task.c
+11 -5
View File
@@ -24,6 +24,7 @@
#include <linux/sched/sysctl.h>
#include <trace/events/sched.h>
#include <trace/hooks/hung_task.h>
/*
* The number of tasks checked:
@@ -183,6 +184,7 @@ static void check_hung_uninterruptible_tasks(unsigned long timeout)
int max_count = sysctl_hung_task_check_count;
unsigned long last_break = jiffies;
struct task_struct *g, *t;
bool need_check = true;
/*
* If the system crashed already then all bets are off,
@@ -207,12 +209,16 @@ static void check_hung_uninterruptible_tasks(unsigned long timeout)
* skip the TASK_KILLABLE tasks -- these can be killed
* skip the TASK_IDLE tasks -- those are genuinely idle
*/
state = READ_ONCE(t->__state);
if ((state & TASK_UNINTERRUPTIBLE) &&
!(state & TASK_WAKEKILL) &&
!(state & TASK_NOLOAD))
check_hung_task(t, timeout);
trace_android_vh_check_uninterruptible_tasks(t, timeout, &need_check);
if (need_check) {
state = READ_ONCE(t->__state);
if ((state & TASK_UNINTERRUPTIBLE) &&
!(state & TASK_WAKEKILL) &&
!(state & TASK_NOLOAD))
check_hung_task(t, timeout);
}
}
trace_android_vh_check_uninterruptible_tasks_dn(NULL);
unlock:
rcu_read_unlock();
if (hung_task_show_lock)