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Re: [RFC PATCH 0/5] Resend - Use procfs to change a syscall behavior [message #31826 is a reply to message #31807] Thu, 10 July 2008 17:53 Go to previous messageGo to previous message
Dave Hansen is currently offline  Dave Hansen
Messages: 240
Registered: October 2005
Senior Member
On Thu, 2008-07-10 at 10:54 +0200, Pavel Machek wrote:
> 
> If you don't see a backward compatibility problem here, perhaps you
> should not be hacking kernel...? The way ids are assigned is certainly
> part of syscall semantics (applications rely on), at least for open.

We also used to have a pretty defined ordering for handing out address
space with mmap().  That all changed with address space randomization.
Are file descriptors different somehow?

Anyway, it's not like we're actually changing existing behavior.  An
application has to do something special and new to trigger this new
behavior.  Nobody is going to stumble over it, and it will *not* break
backward compatibility.

-- Dave

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