linux-kernel - Re: mm snapshot broken-out-2007-03-18-02-44.tar.gz uploaded

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Message-ID: <Pine.LNX.4.64.0703191838220.22180@sbz-30.cs.Helsinki.FI>
Date:	Mon, 19 Mar 2007 18:39:14 +0200 (EET)
From:	Pekka J Enberg <penberg@...helsinki.fi>
To:	Michal Piotrowski <michal.k.k.piotrowski@...il.com>
cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Alan Cox <alan@...hat.com>, LKML <linux-kernel@...r.kernel.org>
Subject: Re: mm snapshot broken-out-2007-03-18-02-44.tar.gz uploaded

On Mon, 19 Mar 2007, Michal Piotrowski wrote:
> > Yes, revoke-special-mmap-handling.patch is bad.
> 
> +               if (unlikely(vma->vm_flags & VM_REVOKED))
> +                       return -ENODEV;
> 
> Why -ENODEV?

That's what we want when trying to remap a revoked mapping (the vma is 
there, but you need to unmap it before reusing the region).

			Pekka
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