linux-kernel - Re: [linux-pm] [PATCH] PM / Hibernate: Restore old swap signature to avoid user space breakage

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Message-Id: <201012112136.23543.rjw@sisk.pl>
Date:	Sat, 11 Dec 2010 21:36:23 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Bojan Smojver <bojan@...ursive.com>
Cc:	"Linux-pm mailing list" <linux-pm@...ts.linux-foundation.org>,
	Karel Zak <kzak@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>,
	"Dr. David Alan Gilbert" <linux@...blig.org>
Subject: Re: [linux-pm] [PATCH] PM / Hibernate: Restore old swap signature to avoid user space breakage

On Saturday, December 11, 2010, Bojan Smojver wrote:
> On Sat, 2010-12-11 at 20:58 +0100, Rafael J. Wysocki wrote:
> > I'm afraid I'll have to push this patch to Linus.  Turns out that
> > Fedora 14 doesn't pass the resume= argument to the kernel and tries to
> > trigger the resume from initramfs.  Since the signature changed, it
> > can't find the image and the resume fails, even if both the resume and
> > image kernels are the same. 
> 
> Why don't you just file a Fedora bug asking for the library to be
> upgraded or patched?

Because that wouldn't fix the user space that _already_ is out there.

> PS. Karel, who also replied to this thread, has a Red Hat address and he
> seems to be the maintainer of util-linux-ng package. He should be able
> to fix this.

That doesn't matter.  The rule is we don't break user space, even if it does
unreasonable things.

Thanks,
Rafael
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