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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 D1264C432C1 for ; Tue, 24 Sep 2019 16:48:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A85AC20673 for ; Tue, 24 Sep 2019 16:48:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1569343718; bh=7DJSolCrQCCDsfBhpfU09oTsWICrh81yjcangCFS3fg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=DB81xjbmaEWoAAjlIYWj/M9Vn/YNV+Wekwnp00iOHftT5+bE+5UweQ2euoIYkIyz6 fR1asxf2EzILHI/sEqwZ1qREv9F2bQAlb5amzs16AieCswfx1rpucmkNbrTNNS3Lm5 5Q/9cuVtB0tw+/I9AAnoRoKM7OPzQ40jcBf+3dp8= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730499AbfIXQsh (ORCPT ); Tue, 24 Sep 2019 12:48:37 -0400 Received: from mail.kernel.org ([198.145.29.99]:40272 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2410512AbfIXQsf (ORCPT ); Tue, 24 Sep 2019 12:48:35 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 2063920673; Tue, 24 Sep 2019 16:48:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1569343715; bh=7DJSolCrQCCDsfBhpfU09oTsWICrh81yjcangCFS3fg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=yz7mqWyPLlhTLd63y/szmpxHk5Q4Td/BEdpVdqbl9N9fgaSeYcWPilef+YA5YvYK7 RTeP9BUAaMX1owfYBh4ER31zebSn6kKhw6FPJJH2vup4sg91ddbt0hAMR7Xof2BSE9 MYxQbk7Foe29BMfFOactHrIN4tnHsnN38ABUvpRE= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Ganesh Goudar , Mahesh Salgaonkar , Nicholas Piggin , Michael Ellerman , Sasha Levin , linuxppc-dev@lists.ozlabs.org Subject: [PATCH AUTOSEL 5.2 63/70] powerpc: dump kernel log before carrying out fadump or kdump Date: Tue, 24 Sep 2019 12:45:42 -0400 Message-Id: <20190924164549.27058-63-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190924164549.27058-1-sashal@kernel.org> References: <20190924164549.27058-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Ganesh Goudar [ Upstream commit e7ca44ed3ba77fc26cf32650bb71584896662474 ] Since commit 4388c9b3a6ee ("powerpc: Do not send system reset request through the oops path"), pstore dmesg file is not updated when dump is triggered from HMC. This commit modified system reset (sreset) handler to invoke fadump or kdump (if configured), without pushing dmesg to pstore. This leaves pstore to have old dmesg data which won't be much of a help if kdump fails to capture the dump. This patch fixes that by calling kmsg_dump() before heading to fadump ot kdump. Fixes: 4388c9b3a6ee ("powerpc: Do not send system reset request through the oops path") Reviewed-by: Mahesh Salgaonkar Reviewed-by: Nicholas Piggin Signed-off-by: Ganesh Goudar Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20190904075949.15607-1-ganeshgr@linux.ibm.com Signed-off-by: Sasha Levin --- arch/powerpc/kernel/traps.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c index 47df30982de1b..c8ea3a253b815 100644 --- a/arch/powerpc/kernel/traps.c +++ b/arch/powerpc/kernel/traps.c @@ -472,6 +472,7 @@ void system_reset_exception(struct pt_regs *regs) if (debugger(regs)) goto out; + kmsg_dump(KMSG_DUMP_OOPS); /* * A system reset is a request to dump, so we always send * it through the crashdump code (if fadump or kdump are -- 2.20.1