Re: resuming swsusp twice

[Pavel Machek <pavel@ucw.cz>]

Hi!

> 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
> 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.
> 
> 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.

Bad, very bad.

> 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
> in the hg repo which had been pulled from www.kernel.org/hg/.

You should not let ext3 do journal replay. At that point, hopefully
damage will be slightly better. 

> It's extremely unfortunate that there is *any* failure mode in swsusp
> that can result in this behavior.

Well, I've never seen that one before...
								Pavel
-- 
teflon -- maybe it is a trademark, but it should not be.
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