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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 461FAEB64D7 for ; Tue, 20 Jun 2023 14:47:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:Reply-To:List-Subscribe:List-Help: List-Post:List-Archive:List-Unsubscribe:List-Id:In-Reply-To:From:References: Cc:To:Subject:MIME-Version:Date:Message-ID:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=ks9/yjR6fN59yJl1WMaYhZO4weXCwYy1zgO35aPx/w4=; b=h/YyAp34Xy3s+w dw5HfNJJ7BnXNJsc2nUDUKc+MHt6IqmvKTvGLYiCOtWsZ02AIruspL4oVOf8r2z4VJnTHyr/wryjf FgJONkca5Bu5uDtBWtdfnVG5rqvsuqJhMzD2ABn1qOZwt/lAPHfqfG9tpXBRd9sU9d5dK4/SDQw+X lVq9QJKFJEsKKt2y5GEVpZcK1zQ0Gn/haO/GJVLRjEwa7VeH23yvxW3IDhXpj/3FaoQWx3LzH8tYl L9l/rwKgEC/v2P7e7tShnXM9QLJ71ctRDbXOTXQ0CqrD/Do2TMUlq+kdd+K3Hbo+74gaewB9Nl+mf Xn2zftf3iXt7N4EiX7Ow==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qBcdf-00BZRm-05; Tue, 20 Jun 2023 14:47:23 +0000 Received: from wp530.webpack.hosteurope.de ([80.237.130.52]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qBcdc-00BZQl-0R for linux-arm-kernel@lists.infradead.org; Tue, 20 Jun 2023 14:47:21 +0000 Received: from [2a02:8108:8980:2478:8cde:aa2c:f324:937e]; authenticated by wp530.webpack.hosteurope.de running ExIM with esmtpsa (TLS1.3:ECDHE_RSA_AES_128_GCM_SHA256:128) id 1qBcdT-00050I-K2; Tue, 20 Jun 2023 16:47:11 +0200 Message-ID: <3853881c-976f-dadc-b64b-4ffd8cc88cf0@leemhuis.info> Date: Tue, 20 Jun 2023 16:47:10 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.12.0 Subject: Re: Regression: serial: imx: overrun errors on debug UART Content-Language: en-US, de-DE To: Stefan Wahren , Sergey Organov Cc: Linux regressions mailing list , =?UTF-8?Q?Uwe_Kleine-K=c3=b6nig?= , Fabio Estevam , =?UTF-8?Q?Ilpo_J=c3=a4rvinen?= , Stefan Wahren , linux-serial@vger.kernel.org, Greg Kroah-Hartman , Sascha Hauer , NXP Linux Team , Pengutronix Kernel Team , Shawn Guo , Jiri Slaby , =?UTF-8?Q?Tomasz_Mo=c5=84?= , Linux ARM References: <2c29454b-9369-4360-8eb4-c151f59460cb@i2se.com> <9e22f237-f3ee-0415-9e6b-89a137769b8f@i2se.com> <5d59dec6-9f6f-7b20-1221-f57c94b29cca@i2se.com> <20230325151100.mskydt3hwbnspqp4@pengutronix.de> <87mt3ynsa7.fsf@osv.gnss.ru> <87sfcy8ncu.fsf@osv.gnss.ru> <534ac8db-ae8f-1ea3-9aa9-2105db7f7a52@i2se.com> <203ce87f-2898-eb10-2f8c-f237859d75e6@leemhuis.info> <87ttw2vnn0.fsf@osv.gnss.ru> From: "Linux regression tracking (Thorsten Leemhuis)" In-Reply-To: X-bounce-key: webpack.hosteurope.de;regressions@leemhuis.info;1687272440;1f7a5496; X-HE-SMSGID: 1qBcdT-00050I-K2 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230620_074720_340607_6FC8014F X-CRM114-Status: GOOD ( 12.45 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: Linux regressions mailing list Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 24.05.23 15:07, Stefan Wahren wrote: > > Am 23.05.23 um 21:44 schrieb Sergey Organov: >> "Linux regression tracking (Thorsten Leemhuis)" >> writes: >> >> Solving this would need to identify the cause of interrupts being >> disabled for prolonged times, and nobody volunteered to investigate this >> further. One suspect, the Linux serial console, has been likely excluded >> already though, as not actually being in use for printk() output. >> > > I don't think that we can exclude the serial console as a whole, i never > made such a observation. But at least we can exclude kernel logging on > the debug UART. Stefan, just wondering: was this ever addressed upstream? I assume it's not, just wanted to be sure. I'm a bit unsure what to do with this and consider asking Greg for advice, as he applied the patch. On one hand it's *IMHO* clearly a regression (but for the record, some people involved in the discussion claim it's not). OTOH the culprit was applied more than a year ago now, so reverting it might cause more trouble than it's worth at this point, as that could lead to regressions for other users. Ciao, Thorsten (wearing his 'the Linux kernel's regression tracker' hat) -- Everything you wanna know about Linux kernel regression tracking: https://linux-regtracking.leemhuis.info/about/#tldr If I did something stupid, please tell me, as explained on that page. #regzbot poke _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel