Under high recovery loads dlm_sendd can monopolise the CPU and cause soft
lockups.
This one extra and one moved cond_resched() make it yield a little more during
such times keeping work moving.
Signed-Off-By: Patrick Caulfield <[EMAIL PROTECTED]>
Patrick
diff -wup linux-2.6.18.ia64/fs/dlm/lowcomms.c linux-2.6.18.ia64/fs/dlm/lowcomms.c
--- linux-2.6.18.ia64/fs/dlm/lowcomms.c 2007-09-13 03:03:44.000000000 -0500
+++ linux-2.6.18.ia64/fs/dlm/lowcomms.c 2007-09-13 09:44:40.000000000 -0500
@@ -1263,14 +1263,15 @@ static void send_to_sock(struct connecti
if (len) {
ret = sendpage(con->sock, e->page, offset, len,
msg_flags);
- if (ret == -EAGAIN || ret == 0)
+ if (ret == -EAGAIN || ret == 0) {
+ cond_resched();
goto out;
+ }
if (ret <= 0)
goto send_error;
- } else {
+ }
/* Don't starve people filling buffers */
cond_resched();
- }
spin_lock(&con->writequeue_lock);
e->offset += ret;
