Re: resuming swsusp twice

From: Stefan Seyfried (seife_at_suse.de)
Date: 07/14/05

  • Next message: Tom Zanussi: "Re: Merging relayfs?" 
    Date:	Thu, 14 Jul 2005 16:58:12 +0200
To: Andy Isaacson <adi@hexapodia.org>

    Andy Isaacson wrote:
    > Yesterday I booted my laptop to 2.6.13-rc2-mm1, suspended to swsusp, and
    > then resumed. It ran fine overnight, including a fair amount of IO
    > (running firefox, rsyncing ~/Mail/archive from my mail server, hg pull,
    > etc). This morning I did a swsusp:
    >
    > echo shutdown > /sys/power/disk
    > echo disk > /sys/power/state
    >
    > and got a panic along the lines of "Unable to find swap space, try

    a panic? it should only be an error message, but the machine should
    still be alive.

    > swapon -a". Unfortunately I was in a hurry and didn't record the error
    > messages. I powered off, then a few minutes later powered on again.

    Powered off hard or "shutdown -h now"?

    > At this point, it resumed *to the swsusp state from yesterday*!
    > As soon as I realized what had happened, I powered off (not
    > shutdown) and rebooted.

    Good.

    > On the next boot it did not find a swsusp signature and booted normally;
    > ext3 did a normal recovery and seemed OK, but I was suspicious and did a
    > fsck -f, which revealed a lot of damage; most of the damage seemed to be

    this is expected in this case, unfortunately.

    > in the hg repo which had been pulled from www.kernel.org/hg/.
    >
    > It's extremely unfortunate that there is *any* failure mode in swsusp
    > that can result in this behavior.

    I of course won't say that this cannot happen, but by design, the swsusp
    signature is invalidated even before reading the image, so theoretically
    it should not happen.

    > I will try to reproduce, but I'm curious if anyone else has seen this.

    i have not seen anything like that, but i am not always running the
    latest & greatest kernel. 

    -- 
Stefan Seyfried                  \ "I didn't want to write for pay. I
QA / R&D Team Mobile Devices      \ wanted to be paid for what I write."
SUSE LINUX Products GmbH, Nürnberg \                    -- Leonard Cohen
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