linux-kernel - Re: [PATCH -mm] kexec jump -v9

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Message-ID: <20080516121836.GE22264@elf.ucw.cz>
Date:	Fri, 16 May 2008 14:18:36 +0200
From:	Pavel Machek <pavel@...e.cz>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>,
	"Huang, Ying" <ying.huang@...el.com>, nigel@...el.suspend2.net,
	Andrew Morton <akpm@...ux-foundation.org>,
	Vivek Goyal <vgoyal@...hat.com>, linux-kernel@...r.kernel.org,
	linux-pm@...ts.linux-foundation.org,
	Kexec Mailing List <kexec@...ts.infradead.org>
Subject: Re: [PATCH -mm] kexec jump -v9

On Thu 2008-05-15 15:03:17, Eric W. Biederman wrote:
> "Rafael J. Wysocki" <rjw@...k.pl> writes:
> 
> > Well, it looks like we do similar things concurrently.  Please have a look 
> > here: http://kerneltrap.org/Linux/Separating_Suspend_and_Hibernation
> 
> Yes.  Part of the reason I wanted to separate these two conversations
> I knew something was going on.
> 
> > Similar patches are in the Greg's tree already.
> 
> Taking a look.
> 
> I just can't get past the fact in that the only reason hibernation can
> not use the widely implemented and tested probe/remove is because of
> filesystems on block devices, and that you are proposing to add 4
> methods for each and every driver to handle that case, when they
> don't need ANYTHING!
> 
> I wonder how hard teaching the upper layers to deal with
> hotplug/remove is?

It looked _too_ hard when I was looking... at least if we are thinking
off "keep the filesystem mounted over unplug-replug".

Or do you have something else in mind?
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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