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ANDROID: power: add vendor hooks for try_to_freeze fail

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Add hooks to gather data of unfrozen tasks and summarize it
with other information.

It helps the bootloader produce the summary information when
kernel panic or watchdog reset occurs. It can be obtained through
Ramdump, etc., and this information can be used to quickly classify
and respond to problems.

Bug: 326888644
Bug: 386310634

Change-Id: I61da3d253bd9959c6f06e09c9a35c4b242cedafe
Signed-off-by: Sangmoon Kim <sangmoon.kim@samsung.com>
(cherry picked from commit 7614c52ba2fac548d99cfd7863302c34441a9f3b)
This commit is contained in:
Sangmoon Kim
2021-01-19 21:00:35 +09:00
committed by T.J. Mercier
parent ca2d053a94
commit 1475729178
3 changed files with 31 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/android/vendor_hooks.c
View File

@@ -53,6 +53,7 @@
#include <trace/hooks/logbuf.h>
#include <trace/hooks/regmap.h>
#include <trace/hooks/softlockup.h>
#include <trace/hooks/power.h>
/*
* Export tracepoints that act as a bare tracehook (ie: have no trace event
@@ -195,3 +196,5 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_slab_folio_alloced);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_kmalloc_large_alloced);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_ctl_dirty_rate);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_watchdog_timer_softlockup);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_try_to_freeze_todo);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_try_to_freeze_todo_unfrozen);

21
include/trace/hooks/power.h Normal file
View File

@@ -0,0 +1,21 @@
/* SPDX-License-Identifier: GPL-2.0 */
#undef TRACE_SYSTEM
#define TRACE_SYSTEM power
#define TRACE_INCLUDE_PATH trace/hooks
#if !defined(_TRACE_HOOK_POWER_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_HOOK_POWER_H
#include <trace/hooks/vendor_hooks.h>
struct task_struct;
DECLARE_HOOK(android_vh_try_to_freeze_todo,
TP_PROTO(unsigned int todo, unsigned int elapsed_msecs, bool wq_busy),
TP_ARGS(todo, elapsed_msecs, wq_busy));
DECLARE_HOOK(android_vh_try_to_freeze_todo_unfrozen,
TP_PROTO(struct task_struct *p),
TP_ARGS(p));
#endif /* _TRACE_HOOK_POWER_H */
/* This part must be outside protection */
#include <trace/define_trace.h>

8
kernel/power/process.c
View File

@@ -20,6 +20,8 @@
#include <trace/events/power.h>
#include <linux/cpuset.h>
#include <trace/hooks/power.h>
/*
* Timeout for stopping processes
*/
@@ -98,11 +100,15 @@ static int try_to_freeze_tasks(bool user_only)
if (!wakeup || pm_debug_messages_on) {
read_lock(&tasklist_lock);
for_each_process_thread(g, p) {
if (p != current && freezing(p) && !frozen(p))
if (p != current && freezing(p) && !frozen(p)) {
sched_show_task(p);
trace_android_vh_try_to_freeze_todo_unfrozen(p);
}
}
read_unlock(&tasklist_lock);
}
trace_android_vh_try_to_freeze_todo(todo, elapsed_msecs, wq_busy);
} else {
pr_info("Freezing %s completed (elapsed %d.%03d seconds)\n",
what, elapsed_msecs / 1000, elapsed_msecs % 1000);