Not enough free swap space to hibernate

Derek Broughton derek at
Wed Mar 25 15:33:26 UTC 2009

Matthew Flaschen wrote:

> Vincent Arnoux wrote:
>> Hello the list,
>> I have 1 GB or RAM and 1 GB of swap.
> Well, that's your problem.  2 GB is typically recommended for 1 GB
> physical memory.  That's what I have, and it works fine.
>> During hibernation, RAM is being written to swap partition. If there
>> is not enough space, suspend to disk just fails. How can I force my
>> swap to be emptied?
> I believe you can do:
> swapoff swaplocation
> swaplocation can be either a partition or a file.  I haven't verified,
> but this should free the entire partition for hibernating.  Of course,
> if you don't have enough physical memory, swapoff can trigger the out of
> memory killer, which will cause (seemingly) random processes to die.

aiui, even swapoff won't purge swap (ie, it won't force anything to be
swapped in, it will simply stop swapping out).  Eventually, of course, the
swap space will be emptied and dismounted.

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