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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id DF708C433EF for ; Tue, 16 Nov 2021 17:29:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C0DFF611AF for ; Tue, 16 Nov 2021 17:29:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238884AbhKPRb4 (ORCPT ); Tue, 16 Nov 2021 12:31:56 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53358 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238728AbhKPRbt (ORCPT ); Tue, 16 Nov 2021 12:31:49 -0500 Received: from metis.ext.pengutronix.de (metis.ext.pengutronix.de [IPv6:2001:67c:670:201:290:27ff:fe1d:cc33]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 13D61C061570 for ; Tue, 16 Nov 2021 09:28:52 -0800 (PST) Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1mn2G8-00014a-0v; Tue, 16 Nov 2021 18:28:40 +0100 Received: from [2a0a:edc0:0:900:1d::77] (helo=ptz.office.stw.pengutronix.de) by drehscheibe.grey.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1mn2G4-000KQv-9X; Tue, 16 Nov 2021 18:28:35 +0100 Received: from ukl by ptz.office.stw.pengutronix.de with local (Exim 4.92) (envelope-from ) id 1mn2G3-0007nB-Dd; Tue, 16 Nov 2021 18:28:35 +0100 Date: Tue, 16 Nov 2021 18:28:35 +0100 From: Uwe =?utf-8?Q?Kleine-K=C3=B6nig?= To: Steven Rostedt Cc: Tony Luck , Kees Cook , Anton Vorontsov , linux-kernel@vger.kernel.org, Ingo Molnar , kernel@pengutronix.de, Colin Cross Subject: Re: [PATCH] pstore/ftrace: add a kernel parameter to start pstore recording Message-ID: <20211116172835.r3puikipzryxnsoj@pengutronix.de> References: <20210610082134.20636-1-u.kleine-koenig@pengutronix.de> <20211116120603.4e0c04c2@gandalf.local.home> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="3v5e3fxrzi2lvohf" Content-Disposition: inline In-Reply-To: <20211116120603.4e0c04c2@gandalf.local.home> X-SA-Exim-Connect-IP: 2a0a:edc0:0:c01:1d::a2 X-SA-Exim-Mail-From: ukl@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-kernel@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --3v5e3fxrzi2lvohf Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hello Steven, On Tue, Nov 16, 2021 at 12:06:03PM -0500, Steven Rostedt wrote: > On Thu, 10 Jun 2021 10:21:34 +0200 > Uwe Kleine-K=F6nig wrote: >=20 > > With this knob you can enable pstore recording early enough to debug > > hangs happening during the boot process before userspace is up enough to > > enable it via sysfs. >=20 > Is this still needed? It's still in my internal patchwork, and I haven't > seen any responses. I didn't see any responses either, and unless someone else implemented something similar somewhere else, it's still needed. The change was actually useful to debug a clk problem, where the machine freezed when a certain driver was loaded. Thanks for keeping track of this change. I would only have noticed it missing next time when I have to debug a similar problem. Best regards Uwe --=20 Pengutronix e.K. | Uwe Kleine-K=F6nig | Industrial Linux Solutions | https://www.pengutronix.de/ | --3v5e3fxrzi2lvohf Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAABCgAdFiEEfnIqFpAYrP8+dKQLwfwUeK3K7AkFAmGT6joACgkQwfwUeK3K 7AkHDQf/fNU67siXsSYQC23dj2owDqfmkFmWztn13/rUvRVqGma1PLhp5aYKfMPO fzZ6PimB/ukOg/xl6bx0uJonshLVlZ0WRf/V7mooJuBQynNOwDd0vWiHsKlv521H TZVYZ0YqLWSGiK2LDmFMoqwPiBXJDeQbwlOYU10PLLxdQYgwE5nPP4BLa66M/MT+ Z0pjzlQPwhQ47X7gvQra9rEA5NJltPCVvi6T+fECQwtFMfZoQ4Hi86cIZ7iIpVzx TMwwQGirGKP2Z23zfCR3cnxhsabHxbKsPoSjfiv5mVBv8/7Yv74tsKPDCs0J7ARS MUjK9UnbFPjO+aeotufGEtX+dmpB7w== =lJo7 -----END PGP SIGNATURE----- --3v5e3fxrzi2lvohf--