linux-kernel - Re: [PATCH] io_thread/x86: don't reset 'cs', 'ss', 'ds' and 'es' registers for io

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Message-ID: <044d0bad-6888-a211-e1d3-159a4aeed52d@polymtl.ca>
Date:   Tue, 4 May 2021 11:55:20 -0400
From:   Simon Marchi <simon.marchi@...ymtl.ca>
To:     Borislav Petkov <bp@...en8.de>,
        Peter Zijlstra <peterz@...radead.org>
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        Andy Lutomirski <luto@...capital.net>,
        Thomas Gleixner <tglx@...utronix.de>,
        Stefan Metzmacher <metze@...ba.org>,
        Jens Axboe <axboe@...nel.dk>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        io-uring <io-uring@...r.kernel.org>,
        the arch/x86 maintainers <x86@...nel.org>,
        linux-toolchains@...r.kernel.org
Subject: Re: [PATCH] io_thread/x86: don't reset 'cs', 'ss', 'ds' and 'es'
 registers for io_threads

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