From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 208AAC433F5 for ; Tue, 5 Apr 2022 23:18:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1455547AbiDEW7M (ORCPT ); Tue, 5 Apr 2022 18:59:12 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39398 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1349155AbiDEJtP (ORCPT ); Tue, 5 Apr 2022 05:49:15 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A261055B5; Tue, 5 Apr 2022 02:41:43 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 5432DB81C14; Tue, 5 Apr 2022 09:41:42 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 956C3C385A2; Tue, 5 Apr 2022 09:41:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1649151700; bh=rlFhRVc8ynRlyfX9WdX+N6hMopQiKNSSEzEufzT5nN0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=r4McnWtKVs1DZ4OJapP1YUdQ7g0CWUDkSD74HgZKEZNibCk8eTKaB5rrDyyT6URW6 fY6CJO8NUVD5yNVJg0nGyKIJOixGXGugCX1SDOUWfbhZO2/GJjkfX6AwCi61zZr6kX WOOzdfu3Dn1oLMUPW6agu3w3X9kLzzxv9LSCkbBE= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Anssi Hannula , Michael Kelley , Wei Liu , Sasha Levin Subject: [PATCH 5.15 511/913] hv_balloon: rate-limit "Unhandled message" warning Date: Tue, 5 Apr 2022 09:26:13 +0200 Message-Id: <20220405070355.171817720@linuxfoundation.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220405070339.801210740@linuxfoundation.org> References: <20220405070339.801210740@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Anssi Hannula [ Upstream commit 1d7286729aa616772be334eb908e11f527e1e291 ] For a couple of times I have encountered a situation where hv_balloon: Unhandled message: type: 12447 is being flooded over 1 million times per second with various values, filling the log and consuming cycles, making debugging difficult. Add rate limiting to the message. Most other Hyper-V drivers already have similar rate limiting in their message callbacks. The cause of the floods in my case was probably fixed by 96d9d1fa5cd5 ("Drivers: hv: balloon: account for vmbus packet header in max_pkt_size"). Fixes: 9aa8b50b2b3d ("Drivers: hv: Add Hyper-V balloon driver") Signed-off-by: Anssi Hannula Reviewed-by: Michael Kelley Link: https://lore.kernel.org/r/20220222141400.98160-1-anssi.hannula@bitwise.fi Signed-off-by: Wei Liu Signed-off-by: Sasha Levin --- drivers/hv/hv_balloon.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/hv/hv_balloon.c b/drivers/hv/hv_balloon.c index f2d05bff4245..439f99b8b5de 100644 --- a/drivers/hv/hv_balloon.c +++ b/drivers/hv/hv_balloon.c @@ -1563,7 +1563,7 @@ static void balloon_onchannelcallback(void *context) break; default: - pr_warn("Unhandled message: type: %d\n", dm_hdr->type); + pr_warn_ratelimited("Unhandled message: type: %d\n", dm_hdr->type); } } -- 2.34.1