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From: Pavel Machek <pavel@ucw.cz>
To: Bill Davidsen <davidsen@tmr.com>
Cc: Linux Kernel M/L <linux-kernel@vger.kernel.org>
Subject: Re: [2.6.21.1] resume doesn't run suspended kernel?
Date: Mon, 28 May 2007 15:26:25 +0200	[thread overview]
Message-ID: <20070528132625.GQ18807@elf.ucw.cz> (raw)
In-Reply-To: <465AD746.7090008@tmr.com>

Hi!

> >That's clear, I'll have to use xen or kvm or similar which restores 
> >the system as suspended. Thanks for the clarification of the limitations.
> >
> Sorry, I wrote that late at night and quickly. I should have said 
> "design decision" rather than "limitation," For systems which don't do 
> multiple kernels it's not an issue.
> 
> I certainly would not have made the same decision, but I didn't write 
> the code. It seems more robust to save everything than to try to 
> identify what has and hasn't changed in a modular kernel.

We rely on atomic copy routine not moving inside the kernel. Yes, it
would be possible to copy it to "known good" address and gain ability
to resume different kernels. Actually it should not be _that_ hard.

									Pavel 
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

  reply	other threads:[~2007-05-28 13:26 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-05-26 22:42 Bill Davidsen
2007-05-27  8:41 ` David Greaves
2007-05-27 13:10   ` Bill Davidsen
2007-05-27 15:26     ` David Greaves
2007-05-27 21:20     ` Pavel Machek
2007-05-27 21:17   ` Pavel Machek
2007-05-27 21:14 ` Pavel Machek
2007-05-28  3:15   ` Bill Davidsen
2007-05-28 13:21     ` Bill Davidsen
2007-05-28 13:26       ` Pavel Machek [this message]
2007-05-28 17:57         ` Rafael J. Wysocki
2007-05-28 22:48           ` Nigel Cunningham
2007-05-29 11:29             ` Pavel Machek
2007-05-29 12:03               ` Rafael J. Wysocki
2007-05-29 12:23                 ` Nigel Cunningham
2007-05-29 12:40                 ` Pavel Machek
2007-05-29 13:13                   ` Nigel Cunningham
2007-05-29 21:51                     ` Rafael J. Wysocki
2007-06-04 11:02                     ` Pavel Machek
2007-06-04 11:05                       ` Nigel Cunningham
2007-06-05  7:23 ` Stefan Seyfried
2007-06-05 14:08   ` Bill Davidsen
     [not found] <fa.rXcMBo+RSE/6L84EBqFCeyFql/k@ifi.uio.no>
2007-05-27  2:44 ` Robert Hancock

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