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tracing: Do not limit the size of the number of CPU buffers

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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: Robin Holt <holt@sgi.com>
Suggested-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Steven Rostedt 2010-10-20 21:51:26 -04:00 committed by Steven Rostedt
parent 750ed158bf
commit dd49a38cf3
1 changed files with 2 additions and 6 deletions
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8
kernel/trace/trace.c
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@ -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);