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ANDROID: GKI:Add VendorHook for ProbeTimeout

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The dpm_prepare and wait_for_device_probe functions may block
for a long time in order to complete their probe. We need to add
vendhook to monitor the execution time and locate the modules
where the long blocking occurs.

Bug: 417369065
Change-Id: I39b3dfdcf4cc8b95a5201d1ce49aec98002e62ce
Signed-off-by: wei li <sirius.liwei@honor.corp-partner.google.com>
This commit is contained in:
wei li
2025-05-13 16:08:42 +08:00
committed by Treehugger Robot
parent e8df77b867
commit 5addce7b33
3 changed files with 7 additions and 0 deletions
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1
drivers/android/vendor_hooks.c
View File

@@ -154,6 +154,7 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_f2fs_restore_priority);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_f2fs_printk);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_f2fs_create);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_io_statistics);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_dpm_prepare);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_ogki_check_vip_status);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_ogki_task_util);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_ogki_uclamp_task_util);

2
drivers/base/power/main.c
View File

@@ -1869,7 +1869,9 @@ int dpm_prepare(pm_message_t state)
* disable probing of devices. This sync point is important at least
* at boot time + hibernation restore.
*/
trace_android_rvh_dpm_prepare(0);
wait_for_device_probe();
trace_android_rvh_dpm_prepare(1);
/*
* It is unsafe if probing of devices will happen during suspend or
* hibernation and system behavior will be unpredictable in this case.

4
include/trace/hooks/dtask.h
View File

@@ -146,6 +146,10 @@ DECLARE_HOOK(android_vh_record_pcpu_rwsem_starttime,
DECLARE_HOOK(android_vh_exit_check,
TP_PROTO(struct task_struct *p),
TP_ARGS(p));
DECLARE_RESTRICTED_HOOK(android_rvh_dpm_prepare,
TP_PROTO(int flag),
TP_ARGS(flag), 1);
#endif /* _TRACE_HOOK_DTASK_H */
/* This part must be outside protection */