Re: [gentoo-user] Screwed up swap while trying to get hibernate working; help

[Iain Buchanan <iaindb@netspace.net.au>]

Joshua Murphy wrote:
> On Thu, Oct 30, 2008 at 11:54 PM, Walter Dnes<waltdnes@waltdnes.org>  wrote:
>>   I ran hibernate once unsuccessfully.  I forgot to put "resume=" into
>> my lilo.conf (oops).  I finally did that, but now, hiberate gets to...
>>
[snip]
>>   What did I did?  And how do I straighten it out?
>
> Umm... if you're hibernating to the same swap partition you're using
> when the system's live... I'm pretty sure you can't do that...

:)  Actually it can!  This is the whole point of using a swap partition 
for hibernating!  In fact, this is the only configuration I used (one 
swap partition to suspend to) for years, until I got a laptop with 4G 
ram I thought a large swap partition was a bit redundant.  Now I 
hibernate to a file.

tuxonice can hibernate to 1 or more swap partitions.

> even if
> everything does manage to fit, having sort out what belongs back in
> ram and what doesn't ... it's not a very sane thing to expect the
> kernel+userspace tools there to do. If I recall from last time I
> considered setting it up on my system, software hibernate needs an
> otherwise unused swap partition that's just a little bigger than the
> amount of physical ram in your system.

actually it can also free up some ram, and your image is compressed 
using lzf which can achieve a claimed 30 - 50% but generally you should 
have enough free swap to cover the size of used RAM.

If you have too little swap, tuxonice will "abort gracefully"

cya,
-- 
Iain Buchanan <iaindb at netspace dot net dot au>

"He don't know me vewy well, DO he?"   -- Bugs Bunny