Date: Thu, 28 Oct 2004 11:24:04 -0400
From: "Theodore Ts'o" <tytso@mit.edu>
To: Len Brown <len.brown@intel.com>
Cc: "Yu, Luming" <luming.yu@intel.com>, Bjorn Helgaas <bjorn.helgaas@hp.com>,
       "Moore, Robert" <robert.moore@intel.com>,
       Alex Williamson <alex.williamson@hp.com>,
       linux-kernel <linux-kernel@vger.kernel.org>,
       acpi-devel@lists.sourceforge.net
Subject: Re: Userspace ACPI interpreter ( was RE: [ACPI] [RFC] dev_acpi: support for userspace access to acpi)
Message-ID: <20041028152404.GB7902@thunk.org>
Mail-Followup-To: Theodore Ts'o <tytso@mit.edu>,
	Len Brown <len.brown@intel.com>, "Yu, Luming" <luming.yu@intel.com>,
	Bjorn Helgaas <bjorn.helgaas@hp.com>,
	"Moore, Robert" <robert.moore@intel.com>,
	Alex Williamson <alex.williamson@hp.com>,
	linux-kernel <linux-kernel@vger.kernel.org>,
	acpi-devel@lists.sourceforge.net
References: <3ACA40606221794F80A5670F0AF15F84041ABFFA@pdsmsx403> <418085B0.30208@intel.com>
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On Thu, Oct 28, 2004 at 01:37:52AM -0400, Len Brown wrote:
> One way to experiment with a user-mode ACPI interpreter would be to 
> continue to use the kernel-mode interpreter for boot up , and cut over 
> to the user-mode interpreter at /sbin/init.  The kernel-mode interpreter 
> could be sent the way of free_initmem() which is called just before 
> /sbin/init is invoked.

Is there a significant advantage to doing having a user-mode ACPI
interpreter?  The only advantage I can think of is that the ACPI
interpreter could now live in pageable memory.  Are there any others?

					- Ted
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