From: "David S. Miller" <davem@redhat.com>
To: root@chaos.analogic.com
Cc: Torrey Hoffman <torrey.hoffman@myrio.com>,
"'Kenneth Johansson'" <ken@canit.se>,
Jonathan Lundell <jlundell@pobox.com>,
linux-kernel@vger.kernel.org
Subject: RE: 2.4 and 2GB swap partition limit
Date: Mon, 30 Apr 2001 12:07:44 -0700 (PDT) [thread overview]
Message-ID: <15085.47104.75880.572242@pizda.ninka.net> (raw)
In-Reply-To: <Pine.LNX.3.95.1010430145555.15714A-100000@chaos.analogic.com>
In-Reply-To: <B65FF72654C9F944A02CF9CC22034CE22E1B9F@mail0.myrio.com> <Pine.LNX.3.95.1010430145555.15714A-100000@chaos.analogic.com>
Richard B. Johnson writes:
> On Mon, 30 Apr 2001, Torrey Hoffman wrote:
> > In general, is there a safe way to replace executable files for
> > programs that might be running while their on-disk images are
> > replaced?
>
> Yes. Perfectly safe:
>
> mv /usr/bin/exeimage /usr/bin/exeimage.sav
> cp /wherever/exeimage /usr/bin/exeimage
>
>
> The executing task will continue to use the old image until it exits.
Even more effective is:
mv /wherever/exeimage /usr/bin/exeimage
The kernel keeps around the contents of the old file while
the executing process still runs.
This is also basically how things like libc get installed.
A single mv is not only preserves currently referenced contents,
it is atomic.
Later,
David S. Miller
davem@redhat.com
next prev parent reply other threads:[~2001-04-30 19:09 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-04-30 18:45 Torrey Hoffman
2001-04-30 19:04 ` Richard B. Johnson
2001-04-30 19:07 ` David S. Miller [this message]
2001-04-30 19:14 ` Richard B. Johnson
2001-04-30 21:04 ` Andreas Ferber
2001-05-02 14:31 ` Andi Kleen
2001-05-02 22:17 ` Andreas Dilger
2001-05-04 8:16 ` Andi Kleen
-- strict thread matches above, loose matches on Subject: below --
2001-05-03 14:04 Ishikawa
2001-03-05 16:53 Andries.Brouwer
2001-03-04 22:04 Matt_Domsch
2001-03-05 8:58 ` Christoph Rohland
2001-03-05 14:30 ` Rik van Riel
2001-03-05 14:36 ` Rik van Riel
2001-03-05 14:52 ` Matti Aarnio
2001-03-05 13:30 ` Christoph Hellwig
2001-03-02 21:23 Matt_Domsch
2001-03-02 23:52 ` Kenneth Johansson
2001-03-03 6:14 ` William T Wilson
2001-03-03 11:14 ` Rogier Wolff
2001-03-08 13:05 ` Goswin Brederlow
2001-04-27 10:51 ` Xavier Bestel
2001-04-27 11:13 ` Rogier Wolff
2001-04-27 20:52 ` LA Walsh
2001-04-27 21:44 ` Rik van Riel
2001-04-27 22:06 ` Thomas Dodd
2001-04-27 22:40 ` Hugh Dickins
2001-04-27 22:40 ` Rik van Riel
2001-04-29 15:12 ` Ingo Oeser
2001-04-27 22:44 ` LA Walsh
2001-04-28 7:47 ` Rogier Wolff
2001-04-27 22:22 ` Wakko Warner
2001-04-28 13:17 ` Rogier Wolff
2001-04-28 13:37 ` Wakko Warner
2001-04-28 14:11 ` Rogier Wolff
2001-04-28 14:28 ` J . A . Magallon
2001-04-30 18:12 ` Alan Cox
2001-05-01 13:00 ` Stephen C. Tweedie
2001-05-01 16:14 ` Rogier Wolff
2001-05-01 16:35 ` Stephen C. Tweedie
2001-05-02 10:54 ` Rogier Wolff
2001-05-02 11:04 ` Stephen C. Tweedie
2001-05-02 12:49 ` Hugh Dickins
2001-05-02 13:43 ` Stephen C. Tweedie
2001-05-02 0:28 ` Rik van Riel
2001-05-02 0:34 ` David S. Miller
2001-05-02 0:43 ` Rik van Riel
2001-05-02 1:14 ` Roger Larsson
2001-05-02 1:30 ` Rik van Riel
2001-05-01 13:39 ` Christoph Rohland
2001-05-01 23:25 ` Rik van Riel
2001-04-28 18:04 ` Albert D. Cahalan
2001-04-28 21:23 ` Rogier Wolff
2001-04-29 1:43 ` Jonathan Lundell
2001-04-29 9:17 ` Kenneth Johansson
2001-04-28 18:21 ` David Lang
2001-04-28 21:25 ` Rogier Wolff
2001-04-30 18:14 ` Alan Cox
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