linux-kernel - Re: [REGRESSION] x86/entry: TIF_SINGLESTEP handling is still broken

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Date:   Sat, 30 Jan 2021 17:55:43 -0800
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Kyle Huey <me@...ehuey.com>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Andy Lutomirski <luto@...nel.org>,
        Gabriel Krisman Bertazi <krisman@...labora.com>,
        open list <linux-kernel@...r.kernel.org>,
        "Robert O'Callahan" <rocallahan@...il.com>
Subject: Re: [REGRESSION] x86/entry: TIF_SINGLESTEP handling is still broken

On Sat, Jan 30, 2021 at 5:32 PM Kyle Huey <me@...ehuey.com> wrote:
>
> I tested that with 2991552447707d791d9d81a5dc161f9e9e90b163 reverted
> and Yuxuan's patch applied to Linus's tip rr works and passes all
> tests.

There's a patch in the -tip tree that hasn't been merged yet:

  git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git core/urgent

(there's only that one patch in that branch right now, commit ID
41c1a06d1d1544bed9692ba72a5692454eee1945).

It should be making its way my direction any day now, but in the
meantime if you can verify that it makes things work for you, that
would be great..

            Linus