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

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

[Walter Dnes]

  I ran hibernate once unsuccessfully.  I forgot to put "resume=" into
my lilo.conf (oops).  I finally did that, but now, hiberate gets to...

hibernate: Running /usr/sbin/s2disk ...
s2disk: Could not use the resume device (try swapon -a). Reason: No such device

...and backs out gracefully.  According to "fdisk -l", swap is there...


[d530][root][~] fdisk -l

Disk /dev/sda: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0xd0000000

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1               1       60801   488384001    5  Extended
/dev/sda5               1          62      497952   83  Linux
/dev/sda6              63         549     3911796   82  Linux swap / Solaris
/dev/sda7             550       60801   483974158+  83  Linux

...but according to swapon, it's not...


[d530][root][~] swapon -a
swapon: /dev/sda6: Invalid argument


  What did I did?  And how do I straighten it out?

-- 
Walter Dnes <waltdnes@waltdnes.org>

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

[Iain Buchanan]

Walter Dnes 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...
>
> hibernate: Running /usr/sbin/s2disk ...
> s2disk: Could not use the resume device (try swapon -a). Reason: No such device
>
> ...and backs out gracefully.  According to "fdisk -l", swap is there...
>
>
> [d530][root][~] fdisk -l
>
> Disk /dev/sda: 500.1 GB, 500107862016 bytes
> 255 heads, 63 sectors/track, 60801 cylinders
> Units = cylinders of 16065 * 512 = 8225280 bytes
> Disk identifier: 0xd0000000
>
>     Device Boot      Start         End      Blocks   Id  System
> /dev/sda1               1       60801   488384001    5  Extended
> /dev/sda5               1          62      497952   83  Linux
> /dev/sda6              63         549     3911796   82  Linux swap / Solaris
> /dev/sda7             550       60801   483974158+  83  Linux
>
> ...but according to swapon, it's not...
>
>
> [d530][root][~] swapon -a
> swapon: /dev/sda6: Invalid argument
>
>
>    What did I did?  And how do I straighten it out?

mkswap /dev/sda6
swapon /dev/sda6
?



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


They had to edit the first ending of 'Lone Wolf McQuade' after Chuck 
Norris kicked David Carradine's ass, then proceeded to barbecue and eat 
him.

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

[Walter Dnes]

> mkswap /dev/sda6
> swapon /dev/sda6

  Thanks, that worked.  Having been bitten before by "doing the
obvious", I was wondering if something else was required.

-- 
Walter Dnes <waltdnes@waltdnes.org>

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

[Joshua Murphy]

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...
>
> hibernate: Running /usr/sbin/s2disk ...
> s2disk: Could not use the resume device (try swapon -a). Reason: No such device
>
> ...and backs out gracefully.  According to "fdisk -l", swap is there...
>
>
> [d530][root][~] fdisk -l
>
> Disk /dev/sda: 500.1 GB, 500107862016 bytes
> 255 heads, 63 sectors/track, 60801 cylinders
> Units = cylinders of 16065 * 512 = 8225280 bytes
> Disk identifier: 0xd0000000
>
>   Device Boot      Start         End      Blocks   Id  System
> /dev/sda1               1       60801   488384001    5  Extended
> /dev/sda5               1          62      497952   83  Linux
> /dev/sda6              63         549     3911796   82  Linux swap / Solaris
> /dev/sda7             550       60801   483974158+  83  Linux
>
> ...but according to swapon, it's not...
>
>
> [d530][root][~] swapon -a
> swapon: /dev/sda6: Invalid argument
>
>
>  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... 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.

-- 
Poison [BLX]
Joshua M. Murphy

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

[Walter Dnes]

On Fri, Oct 31, 2008 at 01:51:58PM -0400, Joshua Murphy wrote

> 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... 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.

  Which begs the next question... howsabout if I turn swap off as part
of the hibernation process?  I.e. in /etc/hibernate/hibernate.conf
include the lines...

OnSuspend 00 swapoff /dev/sda6
OnResume  00 swapon  /dev/sda6

  or for that matter, what's the worst that can happen if I turn off
swap alltogether, and run out of memory?  Is it catastrophic, or merely
inconvenient (additional programs refuse to launch)?

-- 
Walter Dnes <waltdnes@waltdnes.org>

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

[Joshua Murphy]

On Fri, Oct 31, 2008 at 10:41 PM, Walter Dnes <waltdnes@waltdnes.org> wrote:
> On Fri, Oct 31, 2008 at 01:51:58PM -0400, Joshua Murphy wrote
>
>> 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... 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.
>
>  Which begs the next question... howsabout if I turn swap off as part
> of the hibernation process?  I.e. in /etc/hibernate/hibernate.conf
> include the lines...
>
> OnSuspend 00 swapoff /dev/sda6
> OnResume  00 swapon  /dev/sda6
>
>  or for that matter, what's the worst that can happen if I turn off
> swap alltogether, and run out of memory?  Is it catastrophic, or merely
> inconvenient (additional programs refuse to launch)?
>
> --
> Walter Dnes <waltdnes@waltdnes.org>

Well, aside from pointing toward the place where I was corrected... I
*can* answer what happens when you run out of ram... or ram+swap,
actually, if you have swap. It can either kill processes of its own
accord or simply deny new processes and forks of old processes. The
article below has a much better explanation...

http://lwn.net/Articles/104179/

-- 
Poison [BLX]
Joshua M. Murphy

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

[Iain Buchanan]

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

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

[Joshua Murphy]

On Sat, Nov 1, 2008 at 12:18 AM, Iain Buchanan <iaindb@netspace.net.au> wrote:
> 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
>
>

I stand quite humbly corrected... this is what I get for leaving my
old desktop running 24/7 unless kernel changes or power outtages
interrupted. Now with my playing Combat Arms... and being limited to
Windows for that... I may well resort to setting up hibernating for my
system... finally. Great to know the details better now! (and my
apologies for the misinformation)

-- 
Poison [BLX]
Joshua M. Murphy

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

[Iain Buchanan]

Joshua Murphy wrote:
> On Sat, Nov 1, 2008 at 12:18 AM, Iain Buchanan<iaindb@netspace.net.au>  wrote:

> I stand quite humbly corrected... this is what I get for leaving my
> old desktop running 24/7 unless kernel changes or power outtages
> interrupted. Now with my playing Combat Arms... and being limited to
> Windows for that... I may well resort to setting up hibernating for my
> system... finally. Great to know the details better now! (and my
> apologies for the misinformation)

np, I've done much worse in the past...

Hibernate is also great for rebooting to windows for games: hibernate 
linux - boot windows - restart - resume linux!  Just make sure you have
Unmout vfat ntfs
and whatever else windows can mount in your common.conf


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

Stealing a rhinoceros should not be attempted lightly.

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

[Joshua Murphy]

On Sun, Nov 2, 2008 at 6:04 PM, Iain Buchanan <iaindb@netspace.net.au> wrote:
> Joshua Murphy wrote:
>>
>> On Sat, Nov 1, 2008 at 12:18 AM, Iain Buchanan<iaindb@netspace.net.au>
>>  wrote:
>
>> I stand quite humbly corrected... this is what I get for leaving my
>> old desktop running 24/7 unless kernel changes or power outtages
>> interrupted. Now with my playing Combat Arms... and being limited to
>> Windows for that... I may well resort to setting up hibernating for my
>> system... finally. Great to know the details better now! (and my
>> apologies for the misinformation)
>
> np, I've done much worse in the past...
>
> Hibernate is also great for rebooting to windows for games: hibernate linux
> - boot windows - restart - resume linux!  Just make sure you have
> Unmout vfat ntfs
> and whatever else windows can mount in your common.conf
>
>
> --
> Iain Buchanan <iaindb at netspace dot net dot au>
>
> Stealing a rhinoceros should not be attempted lightly.

I'll actually have it unmounting my 500GB xfs storage drive and
killing mpd to do it ... colinux in windows (running Gentoo,
obviously), samba, and winamp... I've gone without my music far too
much in the past, it won't be happening again if I can help it. :-P
... I do simply hibernate windows most of the time, though... so I'll
need to come up with something to go through unmounting that storage
from the colinux side on hibernate, and picking it back up when it
comes back up...

-- 
Poison [BLX]
Joshua M. Murphy

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

[Mick]

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On Saturday 01 November 2008, Iain Buchanan wrote:
> 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.

Is the compression a tuxonice only feature, or has it been applied on the 
gentoo kernel suspend modules too?
-- 
Regards,
Mick

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

[Iain Buchanan]

Mick wrote:
> On Saturday 01 November 2008, Iain Buchanan wrote:
>> 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.
>
> Is the compression a tuxonice only feature, or has it been applied on the
> gentoo kernel suspend modules too?

what are "the gentoo kernel suspend modules"?  None of the kernels in 
portage are really gentoo kernels, but they're kernel.org (or other) 
kernels, with gentoo (and other) patches.

If you mean gentoo-sources or vanilla-sources, then tuxonice patches 
haven't been applied, and I don't _think_ kernel.org's kernel suspend 
uses compression. At least not lzf.  Someone else will answer here :)

There is of course tuxonice-sources though!
-- 
Iain Buchanan <iaindb at netspace dot net dot au>

The sooner you fall behind, the more time you have to catch up.