Re: 2.6.37-rc1+: hibernate regression, claims not enough swap space

Rafael J. Wysocki
2010-11-15T22:27:57Z

On Sunday, November 14, 2010, Pavel Machek wrote:
> Hi!

Hi,

> ...but there's enough -- or at least it was enough to fit previous
> versions. 32-bit machine, so it has highmem.
>
> System is in console mode, very lightly loaded.
>
> Mem: 2054716k total, 736548k used, 1318168k free, 15368k buffers
> Swap: 779148k total, 2360k used, 776788k free, 546388k cached

Well, the swap is rather in short supply. Below the 50% of RAM recommendation.

> thinkpad_acpi: ACPI backlight control delay disabled
> PM: thaw of devices complete after 539.577 msecs
> PM: writing image.
> PM: Free swap pages: 194166
> PM: Not enough free swap
> Restarting tasks ...
>
> Aha, and it is the new default /sys/power/image_size .. setting it to
> 0 lets machine hibernate. I guess the new default is very wrong for
> highmem machine...

The old default did the wrong thing for everyone with sufficient swap (it made
the OOM code trigger every time while preparing to create an image), so I think
the new one it's better overall.

Thanks,
Rafael