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Linux Kernel: Re: Swsusp, resume and kernel versions

Re: Swsusp, resume and kernel versions

Source: http://linux.derkeiler.com/Mailing Lists/Kernel/2005 02/3988.html

From: Dmitry Torokhov (dtor_core_at_ameritech.net)

Date: 02/17/05

To: ***********@********.***

Date: Thu, 17 Feb 2005 00:38:29 0500

Hi Nigel,

On Thursday 17 February 2005 00:15, Nigel Cunningham wrote:

> Hi Dmitry.

>

> On Thu, 2005 02 17 at 15:46, Dmitry Torokhov wrote:

> > Pavel,

>>

> > First of all I must say that swsusp has progressed alot and now works

> > very reliably, at least for my configuration, and I use it a lot. Great

> > job!

>>

> > But I think there is one pretty severe issue present even if swsusp

> > is not enabled kernel should check if there is an image in swap and

> > erase it. Today I has somewhat unpleasant experience after suspending

> > I accidentially loaded a vendor kernel. I was in hurry and decided that

> > resume just failed for some reason so I did couple of things and left

> > the box running. In the evening I realized that I am running vendor kernel

> > and decided to reboot into my devel. version. What I did not expect is for

> > the kernel to find a valid suspend image and restore it. As you might

> > imagine messed up my disk somewhat.

>>

> > Any chance this can be done?

>

> One of my suspend2 users had the same thing yesterday. Unfortunately

> there's no easy way for us to detect that another kernel has been

> booted.

What do you mean? I thought it already compares signatures of the booting

kernel and suspend image. Just wipe it out if it does not match, or, even

better, just stop if signature does not match unless one boots with

"nosuspend". This way even if I start booting wrong image I have a chance

to select right one and avoid fsck.

Dmitry

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