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 X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 03AA1C433E0 for ; Tue, 7 Jul 2020 15:27:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C24D220663 for ; Tue, 7 Jul 2020 15:27:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1594135659; bh=CRpvTakR43SmP2tzl9DQZi6CTXB8+lf/9I6bpYv0GZ4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=N37iGrcoqsZWHCx5D/+tDB+mfsNClQDAIaAhElhgsKHlGDyt2OnmqTOBePpHGvCgm MXK+OK4UMSrldwWzVbUM5sba5I55vVyJaBrpc63RG8caJVfHDE8lJlIvx45liJ4h+r NgK6/B9mihff52IxZ1U7tTQNNTGoT9mY0Sko6q9I= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730083AbgGGP1h (ORCPT ); Tue, 7 Jul 2020 11:27:37 -0400 Received: from mail.kernel.org ([198.145.29.99]:41594 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729064AbgGGP1L (ORCPT ); Tue, 7 Jul 2020 11:27:11 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id BABD920663; Tue, 7 Jul 2020 15:27:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1594135630; bh=CRpvTakR43SmP2tzl9DQZi6CTXB8+lf/9I6bpYv0GZ4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=uWC8hDqPbapi4l6zYnrxHfrl2kYMaM+heFhgqZpvaWfPsTw7CU+66gJlOwPnblQgq zbOqTuO+ka+7vW9NxhdS6A2af1hYjvXVWoiFqepdsAosZ30fHg6rHjuqYy1qgz86py b2weqyUYM/NWZ0dlohs1mL5B95dS3VRKDSIdDFIE= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Joseph Salisbury , Michael Kelley , Wei Liu Subject: [PATCH 5.7 094/112] Drivers: hv: Change flag to write log level in panic msg to false Date: Tue, 7 Jul 2020 17:17:39 +0200 Message-Id: <20200707145805.449065113@linuxfoundation.org> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200707145800.925304888@linuxfoundation.org> References: <20200707145800.925304888@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Joseph Salisbury commit 77b48bea2fee47c15a835f6725dd8df0bc38375a upstream. When the kernel panics, one page of kmsg data may be collected and sent to Hyper-V to aid in diagnosing the failure. The collected kmsg data typically contains 50 to 100 lines, each of which has a log level prefix that isn't very useful from a diagnostic standpoint. So tell kmsg_dump_get_buffer() to not include the log level, enabling more information that *is* useful to fit in the page. Requesting in stable kernels, since many kernels running in production are stable releases. Cc: stable@vger.kernel.org Signed-off-by: Joseph Salisbury Reviewed-by: Michael Kelley Link: https://lore.kernel.org/r/1593210497-114310-1-git-send-email-joseph.salisbury@microsoft.com Signed-off-by: Wei Liu Signed-off-by: Greg Kroah-Hartman --- drivers/hv/vmbus_drv.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/hv/vmbus_drv.c +++ b/drivers/hv/vmbus_drv.c @@ -1328,7 +1328,7 @@ static void hv_kmsg_dump(struct kmsg_dum * Write dump contents to the page. No need to synchronize; panic should * be single-threaded. */ - kmsg_dump_get_buffer(dumper, true, hv_panic_page, HV_HYP_PAGE_SIZE, + kmsg_dump_get_buffer(dumper, false, hv_panic_page, HV_HYP_PAGE_SIZE, &bytes_written); if (bytes_written) hyperv_report_panic_msg(panic_pa, bytes_written);