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Commit dd49a38c authored by Steven Rostedt's avatar Steven Rostedt Committed by Steven Rostedt
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tracing: Do not limit the size of the number of CPU buffers 



The tracing per_cpu buffers were limited to 999 CPUs for a mear
savings in stack space of a char array. Up the array to 30 characters
which is more than enough to hold a 64 bit number.

Reported-by: default avatarRobin Holt <holt@sgi.com>
Suggested-by: default avatarIngo Molnar <mingo@elte.hu>
Signed-off-by: default avatarSteven Rostedt <rostedt@goodmis.org>
parent 750ed158

kernel/trace/trace.c

+2 −6
Original line number Diff line number Diff line
@@ -3996,13 +3996,9 @@ static void tracing_init_debugfs_percpu(long cpu) 
{

	struct dentry *d_percpu = tracing_dentry_percpu();

	struct dentry *d_cpu;

	/* strlen(cpu) + MAX(log10(cpu)) + '\0' */

	char cpu_dir[7];

	char cpu_dir[30]; /* 30 characters should be more than enough */



	if (cpu > 999 || cpu < 0)

		return;



	sprintf(cpu_dir, "cpu%ld", cpu);

	snprintf(cpu_dir, 30, "cpu%ld", cpu);

	d_cpu = debugfs_create_dir(cpu_dir, d_percpu);

	if (!d_cpu) {

		pr_warning("Could not create debugfs '%s' entry\n", cpu_dir);