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From: Godmar Back <godmar@gmail.com>
Date: Mon, 6 Apr 2020 20:01:20 -0400
Message-ID: <CAB4+JY+6U7v9Y54jXQP3sE2ymOLB=82z8sVTLZs_6Hivt0m52g@mail.gmail.com>
Subject: Re: Can TLS be implemented switching from MAP_SHARED to MAP_PRIVATE a
 page reserved for TLS variables ??
To: William Tambe <tambewilliam@gmail.com>
Cc: William Tambe via Libc-help <libc-help@sourceware.org>
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On Mon, Apr 6, 2020 at 7:57 PM William Tambe via Libc-help
<libc-help@sourceware.org> wrote:
>
> Can TLS be implemented switching from MAP_SHARED to MAP_PRIVATE a page
> reserved for TLS variables ?
>
> Switching such a page from MAP_SHARED to MAP_PRIVATE would effectively
> make it local to that thread.

You're confusing threads and processes.
MAP_PRIVATE means a process-private mapping, not a thread-private mapping.