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ANDROID: softlockup: add vendor hook for a softlockup task

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Add hook to gather data of softlockup and summarize it with
other information.

Bug: 222638752

Signed-off-by: Sangmoon Kim <sangmoon.kim@samsung.com>
Change-Id: I5263bbd573c3fa4b4c981ac26c943721ce09506d
This commit is contained in:
Sangmoon Kim
2021-01-19 21:19:01 +09:00
parent ba7e9d1a77
commit 5cc613a916
3 changed files with 23 additions and 0 deletions
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2
drivers/android/vendor_hooks.c
View File

@@ -46,6 +46,7 @@
#include <trace/hooks/remoteproc.h>
#include <trace/hooks/hung_task.h>
#include <trace/hooks/bug.h>
#include <trace/hooks/softlockup.h>
/*
* Export tracepoints that act as a bare tracehook (ie: have no trace event
@@ -227,3 +228,4 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_setscheduler_uclamp);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_do_wake_up_sync);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_set_wake_flags);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_report_bug);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_watchdog_timer_softlockup);

18
include/trace/hooks/softlockup.h Normal file
View File

@@ -0,0 +1,18 @@
/* SPDX-License-Identifier: GPL-2.0 */
#undef TRACE_SYSTEM
#define TRACE_SYSTEM softlockup
#define TRACE_INCLUDE_PATH trace/hooks
#if !defined(_TRACE_HOOK_SOFTLOCKUP_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_HOOK_SOFTLOCKUP_H
#include <linux/tracepoint.h>
#include <trace/hooks/vendor_hooks.h>
struct pt_regs;
DECLARE_HOOK(android_vh_watchdog_timer_softlockup,
TP_PROTO(int duration, struct pt_regs *regs, bool is_panic),
TP_ARGS(duration, regs, is_panic));
#endif /* _TRACE_HOOK_SOFTLOCKUP_H */
/* This part must be outside protection */
#include <trace/define_trace.h>

3
kernel/watchdog.c
View File

@@ -27,6 +27,8 @@
#include <asm/irq_regs.h>
#include <linux/kvm_para.h>
#include <trace/hooks/softlockup.h>
static DEFINE_MUTEX(watchdog_mutex);
#if defined(CONFIG_HARDLOCKUP_DETECTOR) || defined(CONFIG_HAVE_NMI_WATCHDOG)
@@ -439,6 +441,7 @@ static enum hrtimer_restart watchdog_timer_fn(struct hrtimer *hrtimer)
clear_bit_unlock(0, &soft_lockup_nmi_warn);
}
trace_android_vh_watchdog_timer_softlockup(duration, regs, !!softlockup_panic);
add_taint(TAINT_SOFTLOCKUP, LOCKDEP_STILL_OK);
if (softlockup_panic)
panic("softlockup: hung tasks");