From: Jesse Pollard <pollard@tomcat.admin.navo.hpc.mil>
To: marcelo@conectiva.com.br, Alexander Viro <viro@math.psu.edu>
Cc: Jeremy Elson <jelson@circlemud.org>, linux-kernel@vger.kernel.org
Subject: Re: Mapping a piece of one process' addrspace to another?
Date: Wed, 7 Mar 2001 07:57:40 -0600 (CST) [thread overview]
Message-ID: <200103071357.HAA12261@tomcat.admin.navo.hpc.mil> (raw)
Marcelo Tosatti <marcelo@conectiva.com.br>:
> On Wed, 7 Mar 2001, Alexander Viro wrote:
>
> >
> >
> > You are reinventing the wheel.
> > man ptrace (see PTRACE_{PEEK,POKE}{TEXT,DATA} and PTRACE_{ATTACH,CONT,DETACH})
>
> With ptrace data will be copied twice. As far as I understood, Jeremy
> wants to avoid that.
The the only way left would be to mmap a file. The second process could
mmap the same file to put data.I believe the buffers holding the data
would be shared between the two processes.
How the first process detects that I don't know (semaphore? signal?).
-------------------------------------------------------------------------
Jesse I Pollard, II
Email: pollard@navo.hpc.mil
Any opinions expressed are solely my own.
next reply other threads:[~2001-03-07 13:59 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-03-07 13:57 Jesse Pollard [this message]
-- strict thread matches above, loose matches on Subject: below --
2001-03-07 10:51 Manfred Spraul
2001-03-07 5:19 Jeremy Elson
2001-03-07 5:55 ` Alexander Viro
2001-03-07 6:02 ` Marcelo Tosatti
2001-03-07 8:13 ` Jeremy Elson
2001-03-07 8:40 ` Alexander Viro
2001-03-07 8:54 ` Jeremy Elson
2001-03-07 9:09 ` Alexander Viro
2001-03-07 23:22 ` James H. Cloos Jr.
2001-03-07 9:04 ` Abramo Bagnara
2001-03-07 9:10 ` Alexander Viro
2001-03-07 9:20 ` Abramo Bagnara
2001-03-07 9:49 ` Alexander Viro
2001-03-07 13:01 ` Abramo Bagnara
2001-03-07 21:02 ` Jeremy Elson
2001-03-07 8:58 ` Abramo Bagnara
2001-03-07 18:17 ` Pavel Machek
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