[Devel] [PATCH RH7] trace: fix debug prints for busyloop tracking in tracing_read_pipe
Pavel Tikhomirov
ptikhomirov at virtuozzo.com
Wed Nov 7 12:54:46 MSK 2018
Make it realy shut only after 10000 cycles.
https://jira.sw.ru/browse/PSBM-53928
Signed-off-by: Pavel Tikhomirov <ptikhomirov at virtuozzo.com>
---
kernel/trace/trace.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 3bb31030a51c..cce5ef576489 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -4400,7 +4400,7 @@ tracing_read_pipe(struct file *filp, char __user *ubuf,
* entries, go back to wait for more entries.
*/
if (sret == -EBUSY) {
- if ((loops % 10000) == 0) {
+ if ((++loops % 10000) == 0) {
WARN_ON(1);
printk("%ldk loops in tracing_read_pipe\n", loops / 1000);
printk("trace_empty(iter): %d\n", trace_empty(iter));
--
2.17.1
More information about the Devel
mailing list