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Date: Thu, 16 Jan 2003 09:25:10 -0500 (EST)
From: "Richard B. Johnson" <root@chaos.analogic.com>
Reply-To: root@chaos.analogic.com
To: Linux Geek <bourne@ToughGuy.net>
cc: linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: Tar'ing /proc ???
In-Reply-To: <3E26BF92.3020303@ToughGuy.net>
Message-ID: <Pine.LNX.3.95.1030116092224.4430B-100000@chaos.analogic.com>
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On Thu, 16 Jan 2003, Linux Geek wrote:

> 
> 
> Richard B. Johnson wrote:
> 
> >Normally, you do `tar -clf`
> >                        |________ stay on the same file-system.
> >Otherwise toy need to use --exclude /proc.  Proc is a virtual
> >file-system that contains things like kcore. You can get into
> >a deadlock when reading kcore and you don't want this in your
> >backup anyway.
> >
> >
> >  
> >
> so it means,  I can read /proc , write through sysctl interface but no 
> 'copy' business ;-) .

Well you can use `cp` or `cat` because they don't use large amounts
of data that gets extended by calling the kernel to set the break
address (which can cause a deadlock). `tar` keeps allocating more
memory when it reads this large 'file'.


Cheers,
Dick Johnson
Penguin : Linux version 2.4.18 on an i686 machine (797.90 BogoMips).
Why is the government concerned about the lunatic fringe? Think about it.


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