From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from ms.lwn.net (ms.lwn.net [45.79.88.28]) (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 980CE1E89C; Mon, 4 Nov 2024 19:29:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.79.88.28 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730748558; cv=none; b=b50Na2BrVQtjHd0qz4wHkrSff+BKg4Bt3p8kgdj4ymfKkEFo7Yzsz5KTwEZzC23YWG5ooazEeXmRP7zI6BTIl0CAltlU8wjmArWEZKIeBDDfqC0w715Akk5XaZJTlNZ6ldJjYF5F87yUyLhyrbp/AdL/s+MP3qsY7sAojfkljU0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730748558; c=relaxed/simple; bh=/10lBdbCWP9c3Me7/mu9OI01ETDGMCC5hQMI8xKD5pE=; h=From:To:Cc:Subject:In-Reply-To:References:Date:Message-ID: MIME-Version:Content-Type; b=hCO5pQcpLfJMUZeDsCM4lf7OP94bP30zrj8xwiBfZR8hE+rhmFDrOBLYp6MK0cBvXtVBoIlc+k/hsyRsSJWGzneYYYWptOsd8Uy2aTAihS5B71nBqGE7pbuDSnDqgatUeWbD80f+CDkaRLj+EK4ZoFzt/vgZhDr9DmRTbHcqLuU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=lwn.net; spf=pass smtp.mailfrom=lwn.net; dkim=pass (2048-bit key) header.d=lwn.net header.i=@lwn.net header.b=rPCgB/ql; arc=none smtp.client-ip=45.79.88.28 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=lwn.net Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=lwn.net Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=lwn.net header.i=@lwn.net header.b="rPCgB/ql" DKIM-Filter: OpenDKIM Filter v2.11.0 ms.lwn.net B99CA42C30 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=lwn.net; s=20201203; t=1730748553; bh=/10lBdbCWP9c3Me7/mu9OI01ETDGMCC5hQMI8xKD5pE=; h=From:To:Cc:Subject:In-Reply-To:References:Date:From; b=rPCgB/qlsGJ8NYn2P3Xu3eYnNHSDIz71O2zjl+/TLaJYiB8cb1gv6fLhBCYFvZL2T k16tSJCFfOxT0OaBukHDepE0Z//EVth1mIXdZY/KpYfPVPQ8TUIHtEVyMXv1MTCGUz Anv5+DJa751ezbTghlnHwmM4Umhp3zmiBayhls5ih4jGm4Wy5fY/U94e4QJofLDHY4 CoqsILds69cZAvUR/2Os1vbf6wdq30E9LBAbrFMTIYHCCEStNH43ovd6IzXyGmHFHo 8Rb9TiHvVE31b1deKd6yY3tGNAJHmp6nKaOoaI/KqkVWxcqmIuRFjkpG2Gx47B6phq r0tShdfrs251A== Received: from localhost (unknown [IPv6:2601:280:5e00:625::1fe]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by ms.lwn.net (Postfix) with ESMTPSA id B99CA42C30; Mon, 4 Nov 2024 19:29:13 +0000 (UTC) From: Jonathan Corbet To: "Guilherme G. Piccoli" , kexec@lists.infradead.org, linux-doc@vger.kernel.org Cc: bhe@redhat.com, vgoyal@redhat.com, dyoung@redhat.com, linux-kernel@vger.kernel.org, linux-debuggers@vger.kernel.org, stephen.s.brennan@oracle.com, horms@kernel.org, kernel@gpiccoli.net, kernel-dev@igalia.com, mhklinux@outlook.com, "Guilherme G. Piccoli" Subject: Re: [PATCH V4] Documentation: Improve crash_kexec_post_notifiers description In-Reply-To: <20241027204159.985163-1-gpiccoli@igalia.com> References: <20241027204159.985163-1-gpiccoli@igalia.com> Date: Mon, 04 Nov 2024 12:29:12 -0700 Message-ID: <87ed3q94s7.fsf@trenco.lwn.net> Precedence: bulk X-Mailing-List: linux-debuggers@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain "Guilherme G. Piccoli" writes: > The crash_kexec_post_notifiers description could be improved a bit, > by clarifying its upsides (yes, there are some!) and be more descriptive > about the downsides, specially mentioning code that enables the option > unconditionally, like Hyper-V[0], PowerPC (fadump)[1] and more recently, > AMD SEV-SNP[2]. > > [0] Commit a11589563e96 ("x86/Hyper-V: Report crash register data or kmsg before running crash kernel"). > [1] Commit 06e629c25daa ("powerpc/fadump: Fix inaccurate CPU state info in vmcore generated with panic"). > [2] Commit 8ef979584ea8 ("crypto: ccp: Add panic notifier for SEV/SNP firmware shutdown on kdump"). > > Reviewed-by: Stephen Brennan > Signed-off-by: Guilherme G. Piccoli > --- Applied, thanks. jon