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authorSteven Rostedt <srostedt@redhat.com>2010-10-20 21:51:26 -0400
committerSteven Rostedt <rostedt@goodmis.org>2010-10-21 08:55:06 -0400
commitdd49a38cf30944be27892c10b1c0e5b3fa73bcb2 (patch)
tree6f517e3e643923556c92a647918984fc2ea36bb8 /kernel
parent750ed158bf6c782d2813da1bca2c824365a0b777 (diff)
downloadop-kernel-dev-dd49a38cf30944be27892c10b1c0e5b3fa73bcb2.zip
op-kernel-dev-dd49a38cf30944be27892c10b1c0e5b3fa73bcb2.tar.gz
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: Robin Holt <holt@sgi.com> Suggested-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/trace/trace.c8
1 files changed, 2 insertions, 6 deletions
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 001bcd2..82d9b81 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -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);
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