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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, because of some special cases related to our feature, we do not want the process to be frozen immediately, so we add the hook at __refrigerator to make sure we can go to our own freeze logic when the process is about to be frozen.

Bug: 187458531

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 9ac0923ef5
commit 2487db8d59
3 changed files with 8 additions and 1 deletions
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1
drivers/android/vendor_hooks.c
View File

@@ -78,6 +78,7 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_select_task_rq_fair);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_select_task_rq_rt);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_select_task_rq_dl);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_select_fallback_rq);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_refrigerator);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_scheduler_tick);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_enqueue_task);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_dequeue_task);

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

@@ -20,7 +20,9 @@ struct cgroup_taskset;
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);
DECLARE_HOOK(android_vh_cgroup_attach,
TP_PROTO(struct cgroup_subsys *ss, struct cgroup_taskset *tset),
TP_ARGS(ss, tset))

4
kernel/freezer.c
View File

@@ -53,6 +53,9 @@ bool freezing_slow_path(struct task_struct *p)
}
EXPORT_SYMBOL(freezing_slow_path);
#undef CREATE_TRACE_POINT
#include <trace/hooks/cgroup.h>
/* Refrigerator is place where frozen processes are stored :-). */
bool __refrigerator(bool check_kthr_stop)
{
@@ -71,6 +74,7 @@ bool __refrigerator(bool check_kthr_stop)
if (!freezing(current) ||
(check_kthr_stop && kthread_should_stop()))
current->flags &= ~PF_FROZEN;
trace_android_rvh_refrigerator(pm_nosig_freezing);
spin_unlock_irq(&freezer_lock);
if (!(current->flags & PF_FROZEN))