linux-kernel - Re: [RFC][PATCH 0/2 -mm] kexec based hibernation

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Message-ID: <m1d4x95dqy.fsf@ebiederm.dsl.xmission.com>
Date:	Mon, 27 Aug 2007 07:05:41 -0600
From:	ebiederm@...ssion.com (Eric W. Biederman)
To:	Pavel Machek <pavel@....cz>
Cc:	"Huang, Ying" <ying.huang@...el.com>, vgoyal@...ibm.com,
	nigel@...el.suspend2.net,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jeremy Maitin-Shepard <jbms@....edu>,
	Alan Stern <stern@...land.harvard.edu>,
	linux-pm@...ts.linux-foundation.org,
	Kexec Mailing List <kexec@...ts.infradead.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [RFC][PATCH 0/2 -mm] kexec based hibernation

Pavel Machek <pavel@....cz> writes:

> Hi!
>
>> > Does this make sense?
>> 
>> Yes, this is a sensible optimization. But I think it may be better to
>> make bootloader load kernel D directly into a specified memory location.
>> For example, we can add a option to "kernel" command of grub. 
>> 
>> And, I think we can do more in bootloader. Such as we can prepare
>> two
>
> Yes, that would be nice.
>
> It will mean quite a bit of work, but I guess it should be the long
> term goal. Loading restore kernel directly from bootloader means:
>
> 1) it is fast -- no need to boot another kernel
>
> 2) it is "classical" way of doing things
>
> On the other hand, we loose flexibility that way:
>
> 1) it locks you onto one bootloader
>
> 2) you no longer have userland there to do uncompression, decryption,
> etc..

True although for the uncompression and decryption those aren't exactly foreign
requirements for bootloaders.

Eric
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