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 X-Spam-Level: X-Spam-Status: No, score=-5.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B0121C433E0 for ; Sun, 9 Aug 2020 21:05:43 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 71B36206B5 for ; Sun, 9 Aug 2020 21:05:43 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="KLXUNh+D"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=armlinux.org.uk header.i=@armlinux.org.uk header.b="NdRdAum3" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 71B36206B5 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=armlinux.org.uk Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References:Message-ID: Subject:To:From:Date:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=VF8Ihi0oidxjb9pxe6W4J5Gme/KPfsEIxv3ms4qqtI8=; b=KLXUNh+DHXL3v0Jhw0BZ9C7f1 yenkvBv3GNi2FOCHffI1ID9vuJn5PCzOPCBt7I/+ThjoZE/rCWw1F/d2IztPDtuiMz4psy5X8HYx1 Y43qft+qW9Vsg5EtKiR8cknuKmVX4IVRpty6I+rIhv1v4bppDNEPC9mj5PDTl9xMfqjvNKb/zMpI9 +bBs1ies7Cissba7A1LyIslASUhhK0UAnYpE/TriBC4dOTevL4LZ3RpKi6Fs1r33l9hv2Y3Fo+HdF dSYwuj+qpjsjn2cYtjDEG+ku+xtT/RrbdWxUDEmIqfWgzpOGrrRbsdGXLvVduAwuyeN+4IYKGkPin acZFtqavA==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1k4sU3-0002FD-Lq; Sun, 09 Aug 2020 21:03:59 +0000 Received: from pandora.armlinux.org.uk ([2001:4d48:ad52:32c8:5054:ff:fe00:142]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1k4sU0-00028U-F1 for linux-arm-kernel@lists.infradead.org; Sun, 09 Aug 2020 21:03:57 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=armlinux.org.uk; s=pandora-2019; h=Sender:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=vIwzGxzzq0/XUTOr/00BtSsowjHtw+9Y/xzk9taAZck=; b=NdRdAum3DD59ecAem6LEB+PSm O83v+dGjpkxOwf/EyPmsCEOk1SbF4K07JTX9fhjHX6+MybNdMyoa3A9/8et9gAb+NUAPFmQwvHplr z/zDuuAmJN8EbBzSDjW2fifO3C6aKa10M+o1NT2D1BY8TOeuYJaW8XyY54WijtbEaknKMy43XQFf9 BoorAxkW/Qcy5fDitRsnOgaOdmI3zUobglFqpiG8azYurJy+HUqmdt6LwWsKipVoL9X7OXfNENGnr nNH+XUM4Vu3dEc7lszt1ItJZF6wUxY3oYmNeatf58xa0NWVyDrSXfjCXPeWnHYhHaA72+AwS9rhVa +YJjtVZmA==; Received: from shell.armlinux.org.uk ([fd8f:7570:feb6:1:5054:ff:fe00:4ec]:50452) by pandora.armlinux.org.uk with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1k4sQz-0007px-Vy; Sun, 09 Aug 2020 22:00:50 +0100 Received: from linux by shell.armlinux.org.uk with local (Exim 4.92) (envelope-from ) id 1k4sQy-00016h-8O; Sun, 09 Aug 2020 22:00:48 +0100 Date: Sun, 9 Aug 2020 22:00:48 +0100 From: Russell King - ARM Linux admin To: Linus Walleij Subject: Re: [PATCH] ARM: compress: Fix the debug prints Message-ID: <20200809210048.GJ1551@shell.armlinux.org.uk> References: <20200807122656.119574-1-linus.walleij@linaro.org> <20200807125908.GH1551@shell.armlinux.org.uk> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.10.1 (2018-07-13) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200809_170356_628106_FF088E1C X-CRM114-Status: GOOD ( 16.55 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Fabrizio Castro , Ard Biesheuvel , Linux ARM , Nicolas Pitre 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 Sun, Aug 09, 2020 at 10:49:01PM +0200, Linus Walleij wrote: > This comes from commit 3b4af9bc2447 > "ARM: 7672/1: uncompress debug support for multiplatform build" > I think we were just lucky that many kernels were using e.g. > PL01x and the 8250 users on multiplatform have been scratching > their head and wondered why the can't turn on > CONFIG_DEBUG_UNCOMPRESS. Yep, it has been useful in the distant past when debugging the kernel at a very low level to be able to "pause" the kernel, or to guarantee that we grab all messages (using hardware flow control). However, I suspect we don't actually need that facility anymore. > I think it mostly works, but I was baffled that I didn't get the debug > prints on this Qualcomm platforms, while the "Uncompressing Linux..." > message was working fine. Adding this made it work. I suspect on most platforms, the messages generally fit within the FIFO at the rate we poke the characters in vs the rate they appear on the serial line. -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTP is here! 40Mbps down 10Mbps up. Decent connectivity at last! _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel