Re: net/dccp: warning in dccp_feat_clone_sp_val/__might_sleep

[Eric Dumazet]

On Sat, 2016-10-29 at 19:06 +0200, Andrey Konovalov wrote:
> Hi Cong,
> 
> Tested with your patch, still getting a warning, though it's a little different:
> 
> ------------[ cut here ]------------
> WARNING: CPU: 1 PID: 3876 at kernel/sched/core.c:7724
> __might_sleep+0x14c/0x1a0 kernel/sched/core.c:7719
> do not call blocking ops when !TASK_RUNNING; state=1 set at
> [<ffffffff811f5a5c>] prepare_to_wait+0xbc/0x210
> kernel/sched/wait.c:178
> Modules linked in:

This looks like the following patch is needed, can you test it ?
Thanks !

diff --git a/net/dccp/output.c b/net/dccp/output.c
index b66c84db0766..74d8583a0d52 100644
--- a/net/dccp/output.c
+++ b/net/dccp/output.c
@@ -228,6 +228,7 @@ static int dccp_wait_for_ccid(struct sock *sk, unsigned long delay)
 
 	remaining = schedule_timeout(delay);
 
+	sched_annotate_sleep();
 	lock_sock(sk);
 	sk->sk_write_pending--;
 	finish_wait(sk_sleep(sk), &wait);