Date: Fri, 18 Nov 2005 00:08:02 -0800 (PST)
Message-Id: <20051118.000802.81426185.davem@davemloft.net>
To: hugh@veritas.com
Cc: nickpiggin@yahoo.com.au, akpm@osdl.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 07/11] unpaged: COW on VM_UNPAGED
From: "David S. Miller" <davem@davemloft.net>
In-Reply-To: <Pine.LNX.4.61.0511180730530.5435@goblin.wat.veritas.com>
References: <437D6AD0.5080909@yahoo.com.au>
	<20051117.224516.118147408.davem@davemloft.net>
	<Pine.LNX.4.61.0511180730530.5435@goblin.wat.veritas.com>
Mime-Version: 1.0
Content-Type: Text/Plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 653
Lines: 16

From: Hugh Dickins <hugh@veritas.com>
Date: Fri, 18 Nov 2005 08:02:02 +0000 (GMT)

> That code is necessary to reproduce the existing behaviour, which has
> always done COW on PageReserved mappings without complaint - if the
> vm_page_prot didn't already let you slip through without a WP fault.

And there is evidence today that this is really needed, at least
by vbetool.

Ok, we need COW on VM_UNPAGED. :)
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/