strparser: Add __strp_unpause and use it in ktls.
strp_unpause queues strp_work in order to parse any messages that
arrived while the strparser was paused. However, the process invoking
strp_unpause could eagerly parse a buffered message itself if it held
the sock lock.
__strp_unpause is an alternative to strp_pause that avoids the scheduling
overhead that results when a receiving thread unpauses the strparser
and waits for the next message to be delivered by the workqueue thread.
This patch more than doubled the IOPS achieved in a benchmark of NBD
traffic encrypted using ktls.
Signed-off-by: Doron Roberts-Kedes <doronrk@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/tls/tls_sw.c b/net/tls/tls_sw.c
index 839e1e1..8ca57d0 100644
--- a/net/tls/tls_sw.c
+++ b/net/tls/tls_sw.c
@@ -735,7 +735,7 @@ static bool tls_sw_advance_skb(struct sock *sk, struct sk_buff *skb,
/* Finished with message */
ctx->recv_pkt = NULL;
kfree_skb(skb);
- strp_unpause(&ctx->strp);
+ __strp_unpause(&ctx->strp);
return true;
}