add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/md/dm-bufio.c
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@@ -19,6 +19,8 @@
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 #include <linux/rbtree.h>
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 #include <linux/stacktrace.h>
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+#include <trace/hooks/mm.h>
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+
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 #define DM_MSG_PREFIX "bufio"
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 /*
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@@ -1683,6 +1685,13 @@
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 static unsigned long dm_bufio_shrink_scan(struct shrinker *shrink, struct shrink_control *sc)
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 {
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 	struct dm_bufio_client *c;
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+	bool bypass = false;
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+
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+	trace_android_vh_dm_bufio_shrink_scan_bypass(
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+			dm_bufio_current_allocated,
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+			&bypass);
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+	if (bypass)
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+		return 0;
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 	c = container_of(shrink, struct dm_bufio_client, shrinker);
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 	atomic_long_add(sc->nr_to_scan, &c->need_shrink);
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@@ -2009,6 +2018,14 @@
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 {
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 	unsigned long max_age_hz = get_max_age_hz();
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 	struct dm_bufio_client *c;
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+	bool bypass = false;
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+
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+	trace_android_vh_cleanup_old_buffers_bypass(
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+				dm_bufio_current_allocated,
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+				&max_age_hz,
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+				&bypass);
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+	if (bypass)
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+		return;
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 	mutex_lock(&dm_bufio_clients_lock);
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