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=-6.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_PASS,URIBL_BLOCKED autolearn=ham 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 F1698C169C4 for ; Mon, 11 Feb 2019 22:38:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id CA7C62080F for ; Mon, 11 Feb 2019 22:38:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727504AbfBKWio convert rfc822-to-8bit (ORCPT ); Mon, 11 Feb 2019 17:38:44 -0500 Received: from linux-libre.fsfla.org ([209.51.188.54]:39424 "EHLO linux-libre.fsfla.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727325AbfBKWio (ORCPT ); Mon, 11 Feb 2019 17:38:44 -0500 Received: from free.home (home.lxoliva.fsfla.org [172.31.160.164]) by linux-libre.fsfla.org (8.15.2/8.15.2/Debian-3) with ESMTP id x1BMcJ34003936; Mon, 11 Feb 2019 22:38:20 GMT Received: from livre (livre.home [172.31.160.2]) by free.home (8.15.2/8.15.2) with ESMTP id x1BMc0bI178809; Mon, 11 Feb 2019 20:38:00 -0200 From: Alexandre Oliva To: Tom Li Cc: James Hogan , Jiaxun Yang , Huacai Chen , Ralf Baechle , linux-mips@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [RFC] On the Current Troubles of Mainlining Loongson Platform Drivers Organization: Free thinker, not speaking for FSF Latin America References: <20190208083038.GA1433@localhost.localdomain> <20190211125506.GA21280@localhost.localdomain> Date: Mon, 11 Feb 2019 20:38:00 -0200 In-Reply-To: <20190211125506.GA21280@localhost.localdomain> (Tom Li's message of "Mon, 11 Feb 2019 20:55:09 +0800") Message-ID: User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.1 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8BIT X-Scanned-By: MIMEDefang 2.84 Sender: linux-mips-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mips@vger.kernel.org On Feb 11, 2019, Tom Li wrote: > What is the current link to your repository? git://dev.lemote.com/linux-loongson-community.git I use a different git URL to push stuff, so I wouldn't have noticed if the above was gone, but I've just tried to git clone form the above and it seems to remain functional. > We've just identified and confirmed the source of the shutdown problem a > few days ago on this mailing list. It's related to a PREEMPT race condition > in the cpufreq framework that triggers a timing-dependent, probabilistic > lockup in the i8259 PIC driver. And it was first noticed by Ville Syrjälä > on a x86 system, my debugging rediscovered his findings. Oooh, thanks for the links. >> and, more recently, a very slow system overall, that's been present since >> 4.20. > The mainline framebuffer driver doesn't have any hardware drawing, printing > even a single line on the console is required a full screen redraw via memory- That doesn't seem to explain even a quiet boot up taking several times longer than 4.19, and package installation over an ethernet connection (thus not using the console) also taking several times longer. -- Alexandre Oliva, freedom fighter https://FSFLA.org/blogs/lxo Be the change, be Free! FSF Latin America board member GNU Toolchain Engineer Free Software Evangelist Hay que enGNUrecerse, pero sin perder la terGNUra jamás-GNUChe