netdev - Re: [Bugme-new] [Bug 9816] New: cannot replace route

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Message-Id: <20080125192026.e667f396.akpm@linux-foundation.org>
Date:	Fri, 25 Jan 2008 19:20:26 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Jarek Poplawski <jarkao2@...il.com>
Cc:	netdev@...r.kernel.org, joonwpark81@...il.com,
	bugme-daemon@...zilla.kernel.org, schwab@...e.de
Subject: Re: [Bugme-new] [Bug 9816] New: cannot replace route

> On Sat, 26 Jan 2008 00:11:57 +0100 Jarek Poplawski <jarkao2@...il.com> wrote:
> Andrew Morton wrote, On 01/25/2008 11:26 PM:
> 
> >> On Fri, 25 Jan 2008 13:23:49 -0800 (PST) bugme-daemon@...zilla.kernel.org wrote:
> >> http://bugzilla.kernel.org/show_bug.cgi?id=9816
> 
> ...
> 
> > I'd agree with Andrea: replacing a route with itself a) used to work and b)
> > should still work (surely)?
> 
> ...on the other hand:
> 
> $ touch file1
> $ cp file1 file1
> cp: `file1' and `file1' are the same file
> $ mv file1 file1
> mv: `file1' and `file1' are the same file
> 
> and: 'everything' in 'linux' is file...
> 
> ergo: route cannot replace with itself!
> 

That's not a very good analogy - the source is a kernel object.  A better
example would be:

linux-2.6.24-rc8:

echo foo > /tmp/1
echo bar > /tmp/2
echo foo > /tmp/1

linux-2.6.24:

echo foo > /tmp/1
echo bar > /tmp/2
echo foo > /tmp/1
sh: cannot write /tmp/1: Inalid argument

But whatever.   It used to work.  People's scripts will break.  Regression.
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