Commit 2e90de76 authored by Paul E. McKenney's avatar Paul E. McKenney
Browse files

refperf: Dynamically allocate thread-summary output buffer 



Currently, the buffer used to accumulate the thread-summary output is
fixed size, which will cause problems if someone decides to run on a large
number of PCUs.  This commit therefore dynamically allocates this buffer.

[ paulmck: Fix memory allocation as suggested by KASAN. ]
Cc: Joel Fernandes (Google) <joel@joelfernandes.org>
Signed-off-by: default avatarPaul E. McKenney <paulmck@kernel.org>
parent f518f154

kernel/rcu/refperf.c

+5 −1
Original line number Original line Diff line number Diff line
@@ -301,9 +301,12 @@ u64 process_durations(int n) 
	int i;

	int i;

	struct reader_task *rt;

	struct reader_task *rt;

	char buf1[64];

	char buf1[64];

	char buf[512];

	char *buf;

	u64 sum = 0;

	u64 sum = 0;





	buf = kmalloc(128 + nreaders * 32, GFP_KERNEL);

	if (!buf)

		return 0;

	buf[0] = 0;

	buf[0] = 0;

	sprintf(buf, "Experiment #%d (Format: <THREAD-NUM>:<Total loop time in ns>)",

	sprintf(buf, "Experiment #%d (Format: <THREAD-NUM>:<Total loop time in ns>)",

		exp_idx);

		exp_idx);
@@ -322,6 +325,7 @@ u64 process_durations(int n) 




	PERFOUT("%s\n", buf);

	PERFOUT("%s\n", buf);





	kfree(buf);

	return sum;

	return sum;

}

}