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Date:   Wed, 16 Jun 2021 20:55:49 +0000
From:   Al Viro <viro@zeniv.linux.org.uk>
To:     "Eric W. Biederman" <ebiederm@xmission.com>
Cc:     Linus Torvalds <torvalds@linux-foundation.org>,
        Michael Schmitz <schmitzmic@gmail.com>,
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Subject: Re: [PATCH 2/2] alpha/ptrace: Add missing switch_stack frames
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On Wed, Jun 16, 2021 at 03:47:28PM -0500, Eric W. Biederman wrote:

> Fork already saves the registers, all I did was restore them.  Which
> makes a debugger that modifies them in
> PTRACE_EVENT_{FORK,VFORK,CLONE,VFORK_DONE} work.

... first time ever.  Wonderful and well worth the overhead.
</sarcasm>