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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id AA36FEB64DB for ; Tue, 20 Jun 2023 15:00:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233523AbjFTPAZ (ORCPT ); Tue, 20 Jun 2023 11:00:25 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33152 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233673AbjFTPAO (ORCPT ); Tue, 20 Jun 2023 11:00:14 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 164E91984 for ; Tue, 20 Jun 2023 07:59:46 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 23119612D0 for ; Tue, 20 Jun 2023 14:59:21 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0F52BC433CB; Tue, 20 Jun 2023 14:59:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1687273160; bh=3RjJgYHvxHz6U13usMLK7Uu8bvMMGhSroIZVzx3oyFg=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=e/tsxQimJYwM/IURODA1JYov0VCxtw6gOiHrkgLqvXU7RlyBieG2stOcYlAXMAnri SHwVzzflOusIRfdRCXMf/AootEX1MKcw+CvOAD0LKhoxrvxgVUpyliN2HSRMZH6x0J osmGWymMAy4E7TTtAZHY62UhWufNZqtfnTqdEyXo= Date: Tue, 20 Jun 2023 16:59:18 +0200 From: Greg Kroah-Hartman To: Linux regressions mailing list Cc: Stefan Wahren , Sergey Organov , Uwe =?iso-8859-1?Q?Kleine-K=F6nig?= , Fabio Estevam , Ilpo =?iso-8859-1?Q?J=E4rvinen?= , Stefan Wahren , linux-serial@vger.kernel.org, Sascha Hauer , NXP Linux Team , Pengutronix Kernel Team , Shawn Guo , Jiri Slaby , Tomasz =?utf-8?Q?Mo=C5=84?= , Linux ARM Subject: Re: Regression: serial: imx: overrun errors on debug UART Message-ID: <2023062046-jersey-facecloth-7a5d@gregkh> References: <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> <3853881c-976f-dadc-b64b-4ffd8cc88cf0@leemhuis.info> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <3853881c-976f-dadc-b64b-4ffd8cc88cf0@leemhuis.info> Precedence: bulk List-ID: X-Mailing-List: linux-serial@vger.kernel.org On Tue, Jun 20, 2023 at 04:47:10PM +0200, Linux regression tracking (Thorsten Leemhuis) wrote: > 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. I'll be glad to revert this, but for some reason I thought that someone was working on a "real fix" here. Stefan, is that not the case? thanks, greg k-h