ANDROID: vendor_hook: Add hook to abort reclaim and compaction

We need to abort the reclaim/compaction by sending
signal(such as SIGUSR2) to the reclaim thread, or
just abort when cpu-usage is too-high or free-mem is enough.

Bug: 289987875
Change-Id: I4b637cbd2b37235eec27a985a9b5b95598247c59
Signed-off-by: shenjiangjiang <shenjiangjiang@oppo.com>
(cherry picked from commit 024628cc9203cbd4f8471d98435b3a3d6f85764d)

drivers/android/vendor_hooks.c

@@ -488,6 +488,8 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_look_around);
 EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_look_around_migrate_page);
 EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_test_clear_look_around_ref);
 EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_dma_buf_stats_teardown);
+EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_madvise_cold_or_pageout_abort);
+EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_compact_finished);
 /*
  * For type visibility
  */

include/trace/hooks/mm.h

@@ -338,6 +338,12 @@ DECLARE_HOOK(android_vh_look_around,
 	TP_PROTO(struct page_vma_mapped_walk *pvmw, struct page *page,
 		struct vm_area_struct *vma, int *referenced),
 	TP_ARGS(pvmw, page, vma, referenced));
+DECLARE_HOOK(android_vh_compact_finished,
+	TP_PROTO(bool *abort_compact),
+	TP_ARGS(abort_compact));
+DECLARE_HOOK(android_vh_madvise_cold_or_pageout_abort,
+	TP_PROTO(struct vm_area_struct *vma, bool *abort_madvise),
+	TP_ARGS(vma, abort_madvise));
 /* macro versions of hooks are no longer required */
 
 #endif /* _TRACE_HOOK_MM_H */

mm/compaction.c

@@ -45,6 +45,11 @@ static inline void count_compact_events(enum vm_event_item item, long delta)
 #define CREATE_TRACE_POINTS
 #include <trace/events/compaction.h>
 
+#undef CREATE_TRACE_POINTS
+#ifndef __GENKSYMS__
+#include <trace/hooks/mm.h>
+#endif
+
 #define block_start_pfn(pfn, order)	round_down(pfn, 1UL << (order))
 #define block_end_pfn(pfn, order)	ALIGN((pfn) + 1, 1UL << (order))
 #define pageblock_start_pfn(pfn)	block_start_pfn(pfn, pageblock_order)
@@ -1984,6 +1989,7 @@ static enum compact_result __compact_finished(struct compact_control *cc)
 	unsigned int order;
 	const int migratetype = cc->migratetype;
 	int ret;
+	bool abort_compact = false;
 
 	/* Compaction run completes if the migrate and free scanner meet */
 	if (compact_scanners_met(cc)) {
@@ -2083,7 +2089,8 @@ static enum compact_result __compact_finished(struct compact_control *cc)
 	}
 
 out:
-	if (cc->contended || fatal_signal_pending(current))
+	trace_android_vh_compact_finished(&abort_compact);
+	if (cc->contended || fatal_signal_pending(current) || abort_compact)
 		ret = COMPACT_CONTENDED;
 
 	return ret;

mm/madvise.c

@@ -322,8 +322,10 @@ static int madvise_cold_or_pageout_pte_range(pmd_t *pmd,
 	struct page *page = NULL;
 	LIST_HEAD(page_list);
 	bool allow_shared = false;
+	bool abort_madvise = false;
 
-	if (fatal_signal_pending(current))
+	trace_android_vh_madvise_cold_or_pageout_abort(vma, &abort_madvise);
+	if (fatal_signal_pending(current) || abort_madvise)
 		return -EINTR;
 
 	trace_android_vh_madvise_cold_or_pageout(vma, &allow_shared);