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ANDROID: sched: create trace points for 32bit execve

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Module code would like to hold some locks when affinity is being updated
for 32 bit task exec.

Create pre and post tracepoints in force_compatible_cpus_allowed_ptr()

Bug: 187917024
Change-Id: I95bff9f4d5b5d37c1d5440acbd6857d2855c2b43
Signed-off-by: Abhijeet Dharmapurikar <adharmap@codeaurora.org>
Signed-off-by: Shaleen Agrawal <shalagra@codeaurora.org>
This commit is contained in:
Abhijeet Dharmapurikar
2021-06-01 16:40:51 -07:00
committed by Todd Kjos
parent 79cb255c79
commit 3f5e8b830c
3 changed files with 12 additions and 0 deletions
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2
drivers/android/vendor_hooks.c
View File

@@ -312,3 +312,5 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_fill_ext_fmtdesc);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_clear_mask_adjust);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_scmi_timeout_sync);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_find_new_ilb);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_force_compatible_pre);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_force_compatible_post);

8
include/trace/hooks/sched.h
View File

@@ -370,6 +370,14 @@ DECLARE_RESTRICTED_HOOK(android_rvh_find_new_ilb,
TP_PROTO(struct cpumask *nohz_idle_cpus_mask, int *ilb),
TP_ARGS(nohz_idle_cpus_mask, ilb), 1);
DECLARE_HOOK(android_vh_force_compatible_pre,
TP_PROTO(void *unused),
TP_ARGS(unused));
DECLARE_HOOK(android_vh_force_compatible_post,
TP_PROTO(void *unused),
TP_ARGS(unused));
/* macro versions of hooks are no longer required */
#endif /* _TRACE_HOOK_SCHED_H */

2
kernel/sched/core.c
View File

@@ -2103,6 +2103,7 @@ void force_compatible_cpus_allowed_ptr(struct task_struct *p)
* offlining of the chosen destination CPU, so take the hotplug
* lock to ensure that the migration succeeds.
*/
trace_android_vh_force_compatible_pre(NULL);
cpus_read_lock();
if (!cpumask_available(new_mask))
goto out_set_mask;
@@ -2127,6 +2128,7 @@ out_set_mask:
WARN_ON(set_cpus_allowed_ptr(p, override_mask));
out_free_mask:
cpus_read_unlock();
trace_android_vh_force_compatible_post(NULL);
free_cpumask_var(new_mask);
}