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ANDROID: vendor_hook: add hooks to protect locking-tsk in cpu scheduler

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Providing vendor hooks to record the start time of holding the lock, which
protects rwsem/mutex locking-process from being preemptedfor a short time
in some cases.

- android_vh_record_mutex_lock_starttime
- android_vh_record_rtmutex_lock_starttime
- android_vh_record_rwsem_lock_starttime
- android_vh_record_percpu_rwsem_lock_starttime

Bug: 241191475

Signed-off-by: Peifeng Li <lipeifeng@oppo.com>
Change-Id: I0e967a1e8b77c32a1ad588acd54028fae2f90c4e
This commit is contained in:
Peifeng Li
2022-08-03 19:42:27 +08:00
committed by Matthias Männich
parent fb39cdb9ea
commit eed2741ae6
7 changed files with 76 additions and 7 deletions
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4
drivers/android/vendor_hooks.c
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@@ -259,6 +259,10 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_commit_creds);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_exit_creds);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_override_creds);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_revert_creds);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_record_mutex_lock_starttime);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_record_rtmutex_lock_starttime);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_record_rwsem_lock_starttime);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_record_percpu_rwsem_lock_starttime);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_set_memory_x);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_set_memory_nx);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_set_memory_ro);