netdev - [PATCH] vsock: ratelimit unknown ioctl error message

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Message-Id: <20201023122113.35517-1-colin.king@canonical.com>
Date:   Fri, 23 Oct 2020 13:21:13 +0100
From:   Colin King <colin.king@...onical.com>
To:     "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Stefano Garzarella <sgarzare@...hat.com>,
        netdev@...r.kernel.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] vsock: ratelimit unknown ioctl error message

From: Colin Ian King <colin.king@...onical.com>

When exercising the kernel with stress-ng with some ioctl tests the
"Unknown ioctl" error message is spamming the kernel log at a high
rate. Rate limit this message to reduce the noise.

Signed-off-by: Colin Ian King <colin.king@...onical.com>
---
 net/vmw_vsock/af_vsock.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/vmw_vsock/af_vsock.c b/net/vmw_vsock/af_vsock.c
index 9e93bc201cc0..b8feb9223454 100644
--- a/net/vmw_vsock/af_vsock.c
+++ b/net/vmw_vsock/af_vsock.c
@@ -2072,7 +2072,7 @@ static long vsock_dev_do_ioctl(struct file *filp,
 		break;
 
 	default:
-		pr_err("Unknown ioctl %d\n", cmd);
+		pr_err_ratelimited("Unknown ioctl %d\n", cmd);
 		retval = -EINVAL;
 	}
 
-- 
2.27.0