Swap partition mysteriously disappears

[Derek Broughton]

David Abrahams wrote:

> Derek Broughton <news at pointerstop.ca> writes:
> 
>> Does anybody have a clue how/why a swap could quietly disappear?
>>
>> Fairly often (enough that I'm going to put a "swapon -a" in the resume
>> sequence after hibernation) it happens when I hibernate and resume -
> 
> Yeah, that happens with me; my swap is an LVM2 volume, though.

/ and swap are the only things I _don't_ have in LVM.
> 
>> there's obviously a valid swap partition at hibernate time, but it
>> doesn't
>> get reused after resume.  This makes sense, as I understand swsusp
>> changes the partition's signature and it isn't actually a valid swap
>> partition at
>> boot time.  otoh, when this happens, "swapon -a" always works.
> 
> Not for me, IIRC.  Afraid to try again and find out; losing my swap is
> a bit too scary.  

Why?  Everything works without a swap file.  It just gets really, really
slow.
-- 
derek