From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8B5C445037 for ; Mon, 25 Mar 2024 20:29:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711398551; cv=none; b=cvxWYKQ5bGa9qSzo5XXw/d98uqK2TtxPsP0SJIbB+ih6NqzJ0ojpWAKhHCmgh3GOj+pSAygkKleseEpyta9YByA41eXFQAIpeZecdTV3PwbcNCyD4Bw/0zmyDnbJz95X+mcAZkYA3z2Iabyb+1ux84f91HyZYm+JiL8ZhhenI1c= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711398551; c=relaxed/simple; bh=nfVLFY97TTH4TNsZH8G5ndSxRhKAMtXtADlNh6V0jyk=; h=Date:From:To:Cc:Subject:Message-Id:In-Reply-To:References: Mime-Version:Content-Type; b=VMBAz2ABgrgyzy3Obk11+cUu6YCLHKPoV08Qjn0NZOA5pXLCqWok+s0Nqs7HfMXwqCnLJ9mfBbC3U3hLuSSExNUdukzMF5+84FvOOkY18pc1DhqmHrxwrLkG0O/Rd7nTeuabekWD3CdKDC5/97cEddPUlWqqlPw3FwRjsWawNvA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b=lLqvdpov; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="lLqvdpov" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5DD3AC433C7; Mon, 25 Mar 2024 20:29:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1711398550; bh=nfVLFY97TTH4TNsZH8G5ndSxRhKAMtXtADlNh6V0jyk=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=lLqvdpovYZYCLrBxcniicIdrfgG84STczHwD082AmwsVdLSbADv7f8H+LXhIBvDgn jFPLERwXKBBCnDazptInYJ5w1EdJJyIqLziwHyHzqpdNzPQkPg/xibLzKrLh5VcNub DEDjxkQPrWn24SyhoPel+o+zO2Rr/LLZoK2Ccv4E= Date: Mon, 25 Mar 2024 13:29:09 -0700 From: Andrew Morton To: Baoquan He Cc: kexec@lists.infradead.org, mingo@kernel.org, linux-kernel@vger.kernel.org, x86@kernel.org, chenhuacai@loongson.cn, dyoung@redhat.com, jbohac@suse.cz, lihuafei1@huawei.com, chenhaixiang3@huawei.com Subject: Re: [PATCH v2] crash: use macro to add crashk_res into iomem early for specific arch Message-Id: <20240325132909.741ae47a8a05837c175a981e@linux-foundation.org> In-Reply-To: References: <20240324033513.1027427-1-bhe@redhat.com> X-Mailer: Sylpheed 3.8.0beta1 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit On Mon, 25 Mar 2024 09:50:50 +0800 Baoquan He wrote: > There are regression reports[1][2] that crashkernel region on x86_64 can't > be added into iomem tree sometime. This causes the later failure of kdump > loading. So I think a cc:stable is needed. > This happened after commit 4a693ce65b18 ("kdump: defer the insertion of > crashkernel resources") was merged. > > Even though, these reported issues are proved to be related to other > component, they are just exposed after above commmit applied, I still > would like to keep crashk_res and crashk_low_res being added into iomem > early as before because the early adding has been always there on x86_64 > and working very well. For safety of kdump, Let's change it back. I'll use 4a693ce65b18 as the Fixes: target, since there is no "Exposed-by-non-buggy-patch:" tag. To tell the -stable tree maintainers how far back in history this should be backported.