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=-7.3 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, NICE_REPLY_A,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 C63DAC433ED for ; Tue, 4 May 2021 16:03:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8A208613BA for ; Tue, 4 May 2021 16:03:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231519AbhEDQEe (ORCPT ); Tue, 4 May 2021 12:04:34 -0400 Received: from smtp.polymtl.ca ([132.207.4.11]:55800 "EHLO smtp.polymtl.ca" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230512AbhEDQEd (ORCPT ); Tue, 4 May 2021 12:04:33 -0400 X-Greylist: delayed 436 seconds by postgrey-1.27 at vger.kernel.org; Tue, 04 May 2021 12:04:32 EDT Received: from simark.ca (simark.ca [158.69.221.121]) (authenticated bits=0) by smtp.polymtl.ca (8.14.7/8.14.7) with ESMTP id 144FtMdo022653 (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 4 May 2021 11:55:28 -0400 DKIM-Filter: OpenDKIM Filter v2.11.0 smtp.polymtl.ca 144FtMdo022653 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=polymtl.ca; s=default; t=1620143731; bh=mb48+00zpPbvRbcsykAoM8HYST7h93Xm5FluF1gWiIs=; h=Subject:To:Cc:References:From:Date:In-Reply-To:From; b=jF4fg/WfD6s661HWEVr8b+CLh7y5FMJ0G2DAmYpbQQZoQmIq/ezQlwPgOX+ujiA9R krtvf/fB+y0k7rgagEFjoLou7TF67ynZAo1ZWZLblYtfQ9mFLxWOR84D8wRSEkAMQ0 wpORgf2sSe6GgZgPWWaWT9rPO5hzAERyeunWojpw= Received: from [10.0.0.11] (192-222-157-6.qc.cable.ebox.net [192.222.157.6]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by simark.ca (Postfix) with ESMTPSA id 82CBD1E54D; Tue, 4 May 2021 11:55:21 -0400 (EDT) Subject: Re: [PATCH] io_thread/x86: don't reset 'cs', 'ss', 'ds' and 'es' registers for io_threads To: Borislav Petkov , Peter Zijlstra Cc: Linus Torvalds , Andy Lutomirski , Thomas Gleixner , Stefan Metzmacher , Jens Axboe , Linux Kernel Mailing List , io-uring , the arch/x86 maintainers , linux-toolchains@vger.kernel.org References: <8735v3ex3h.ffs@nanos.tec.linutronix.de> <3C41339D-29A2-4AB1-958F-19DB0A92D8D7@amacapital.net> From: Simon Marchi Message-ID: <044d0bad-6888-a211-e1d3-159a4aeed52d@polymtl.ca> Date: Tue, 4 May 2021 11:55:20 -0400 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.7.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-Poly-FromMTA: (simark.ca [158.69.221.121]) at Tue, 4 May 2021 15:55:22 +0000 Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org On 2021-05-04 11:35 a.m., Borislav Petkov wrote: > On Tue, May 04, 2021 at 10:39:23AM +0200, Peter Zijlstra wrote: >> Anybody on toolchains that can help get GDB fixed? > > In the meantime, Tom is looking at fixing this, in case people wanna try > gdb patches or give him a test case or so... > > https://sourceware.org/bugzilla/show_bug.cgi?id=27822 Yes, please provide reproducing steps in that bug. Unlike what was said in this thread, some people do work on gdb and are willing to fix things, but they can only do so if they know about the problem. Simon