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ANDROID: freezer: Add vendor hook to freezer for GKI purpose.

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Add the vendor hook to freezer.c so that OEM's logic can be executed
when the process is about to be frozen. We need to clear the flag for
some tasks and rebind task dependencies for optimization purposes.

Bug: 187458531
Bug: 281920779

Signed-off-by: heshuai1 <heshuai1@xiaomi.com>
Change-Id: Iea42fd9604d6b33ccd6502425416f0dd28eecebb
(cherry picked from commit a1580311c36ca28344b2f03b3c8a72d9f8db5bde)
This commit is contained in:
heshuai1 2021-05-07 19:40:52 +08:00 • committed by Todd Kjos
parent 632ec01905
commit a9a44851ec
3 changed files with 9 additions and 0 deletions
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1
drivers/android/vendor_hooks.c
View file

@ -67,6 +67,7 @@
* Export tracepoints that act as a bare tracehook (ie: have no trace event
* associated with them) to allow external modules to probe them.
*/
EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_refrigerator);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_arch_set_freq_scale);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_is_fpsimd_save);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_binder_transaction_init);

4
include/trace/hooks/cgroup.h
View file

@ -12,6 +12,10 @@ DECLARE_HOOK(android_vh_cgroup_set_task,
TP_PROTO(int ret, struct task_struct *task),
TP_ARGS(ret, task));
DECLARE_RESTRICTED_HOOK(android_rvh_refrigerator,
TP_PROTO(bool f),
TP_ARGS(f), 1);
struct cgroup_subsys;
struct cgroup_taskset;
DECLARE_HOOK(android_vh_cgroup_attach,

4
kernel/freezer.c
View file

@ -12,6 +12,9 @@
#include <linux/freezer.h>
#include <linux/kthread.h>
#undef CREATE_TRACE_POINT
#include <trace/hooks/cgroup.h>
/* total number of freezing conditions in effect */
DEFINE_STATIC_KEY_FALSE(freezer_active);
EXPORT_SYMBOL(freezer_active);
@ -75,6 +78,7 @@ bool __refrigerator(bool check_kthr_stop)
spin_lock_irq(&freezer_lock);
freeze = freezing(current) && !(check_kthr_stop && kthread_should_stop());
trace_android_rvh_refrigerator(pm_nosig_freezing);
spin_unlock_irq(&freezer_lock);
if (!freeze)