linux-kernel - [PATCH] binder: filter out nodes when showing binder procs

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Message-Id: <20181203202457.228972-3-tkjos@google.com>
Date:   Mon,  3 Dec 2018 12:24:56 -0800
From:   Todd Kjos <tkjos@...roid.com>
To:     tkjos@...gle.com, gregkh@...uxfoundation.org, arve@...roid.com,
        devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org,
        maco@...gle.com, joel@...lfernandes.org
Cc:     kernel-team@...roid.com
Subject: [PATCH] binder: filter out nodes when showing binder procs

When dumping out binder transactions via a debug node,
the output is too verbose if a process has many nodes.
Change the output for transaction dumps to only display
nodes with pending async transactions.

Signed-off-by: Todd Kjos <tkjos@...gle.com>
---
 drivers/android/binder.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/android/binder.c b/drivers/android/binder.c
index 9f2059d24ae2d..c525b164d39d2 100644
--- a/drivers/android/binder.c
+++ b/drivers/android/binder.c
@@ -5432,6 +5432,9 @@ static void print_binder_proc(struct seq_file *m,
 	for (n = rb_first(&proc->nodes); n != NULL; n = rb_next(n)) {
 		struct binder_node *node = rb_entry(n, struct binder_node,
 						    rb_node);
+		if (!print_all && !node->has_async_transaction)
+			continue;
+
 		/*
 		 * take a temporary reference on the node so it
 		 * survives and isn't removed from the tree
-- 
2.20.0.rc1.387.gf8505762e3-goog