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 D7685EB64DC for ; Tue, 20 Jun 2023 16:31:00 +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-Type: Content-Transfer-Encoding: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:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=HHL4Hw5+LoQ3jpogJnd9drryf+Tx19mtmZ09LDbhdsk=; b=dnVECWndRFLLcJ ThVkJ1o/spq+DLbde4qvv9I6jKUW4+RGM1JsIDvePnPDb7BN1dzAUhGK+HyNUxsLr33KzjWmOzsTi 636eAjTx6/wCNCdW0EbUSPQ+ywFJj53yPBqgYI7O+L77yA96TaMsHEAAbu8cg+/oPDDCzW8mwUuIM kInFYCg+EUmmMGG7NQMt/fxVq/kfgWnEgpLDel/njVSLtmxhclXOzhI+RTz7TBqp++ltRsjvYMafm X1JmUIhmvMiVFh2mJX3BPaXzIccvodvNL4qRHDN42sCSciVpzMAhncRFLlZSnM+OMmZfwPuVy8RyR MEKxvSr1HN3FzKVI4EBA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qBeFT-00Bovl-1Q; Tue, 20 Jun 2023 16:30:31 +0000 Received: from mout.kundenserver.de ([212.227.126.130]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qBeFQ-00Botl-1A for linux-arm-kernel@lists.infradead.org; Tue, 20 Jun 2023 16:30:30 +0000 Received: from [192.168.1.141] ([37.4.248.63]) by mrelayeu.kundenserver.de (mreue011 [212.227.15.167]) with ESMTPSA (Nemesis) id 1Mv3I0-1ptqNK0mzw-00r2Uk; Tue, 20 Jun 2023 18:30:06 +0200 Message-ID: Date: Tue, 20 Jun 2023 18:30:04 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.11.0 Subject: Re: Regression: serial: imx: overrun errors on debug UART To: Greg Kroah-Hartman , Linux regressions mailing list Cc: Sergey Organov , =?UTF-8?Q?Uwe_Kleine-K=c3=b6nig?= , Fabio Estevam , =?UTF-8?Q?Ilpo_J=c3=a4rvinen?= , Stefan Wahren , linux-serial@vger.kernel.org, Sascha Hauer , NXP Linux Team , Pengutronix Kernel Team , Shawn Guo , Jiri Slaby , =?UTF-8?Q?Tomasz_Mo=c5=84?= , Linux ARM 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> <2023062046-jersey-facecloth-7a5d@gregkh> Content-Language: en-US From: Stefan Wahren In-Reply-To: <2023062046-jersey-facecloth-7a5d@gregkh> X-Provags-ID: V03:K1:Hvg1nnR0gyMueJiif3E6u1lqHozMUmRuFvcyxVqpIgO5/1Nb8pt OCkvLOL6vuotxFRGWzrjdjpQfdZKf6rqPjaQHy7wBn6Aq35wObVlER9YchE3/UCwtAYID2h z7RivhmDWvhwV4MdpBnLLgDOh7y2foHhtLVd3saNe1vYUbqpwuH8brvS6PvDJkDoZNYj4LW Nr/yM20REJIhwK0ziYyMA== UI-OutboundReport: notjunk:1;M01:P0:0GnIusRd9Pk=;OPzcghOhIT8qyY4MRPPDcyAXP+1 ftv6dqweybgaevjzmJlb0nosgVvDJ2e32bxcQkcOA3ds+m17LR8I5vFz6eSi5DUh3ibHZHP3U C8BqfUnuhGSgD0ssfq9oJU7SeeWJ1m8cl4JfiFBVZesWWqUMNE1H0RPheQLgbR6n3GbWL5yqs PbaZ9M98X3RWR8vQE//RVjQnPxk+n3tPL0xz3PrAKbl1gQ9fCqSz4+SlhlIEW884IJDKKjS8V KR7bucRiE3/kKppm0NxY8Oi7xrrPqWLX/dW9PmTUQQVub1w6ackHIEXytGeVpfluLvbiS4GiT 4093G7M8ztKg2K0HuPrl07uZKJyu0A51izW4+IYwjj1oYVjvtYpPgLjykj3MFmWf6xdg+OtGW eARrYQxggpr4Zl4NMhtbKLs5kKJVvOMVfNAsQs5+lMamszGbo+6PLBNzvWLqH9W1ZXBLmcZtG kx8nOmYLv22CVRpVqcHw7KGOIqwqXSPbQ05OkNpX/4HCZtqUhKUngPbjUlgIGQZtG+jy1ceS9 T1U9oymOl7seSakuCLr7CCc3Pi5C/h+u+/zMNu7V5bMOsecH9v/z7YY095ZSQhfoX5N++YFfp fApE/hpj8qaVZ5oLR/gixcCfyi1tok9ZVfjdypy6R4R8sTX/n/UcN7OUXQtPBBHaRCxyL7F+z GN0p83XUAQw2ngfJ74DbDo7INGrQ2mrJ6pzMkLgsAQ== X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230620_093028_707655_B5CAA13E X-CRM114-Status: GOOD ( 17.44 ) 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: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi Greg, Am 20.06.23 um 16:59 schrieb Greg Kroah-Hartman: > 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? i can only repeat the statements from 23.5.: Unfortunately my time budget to investigate this issue further is exhausted, so i stopped working at this. In case someone can give clear instructions to investigate this further, i will try to look at it in my spare time. But i cannot make any promises. I'm not aware that some else is working on this. Best regards > > thanks, > > greg k-h _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel