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On Wednesday, 2014-08-13 at 09:16 +1000, Dave Chinner wrote:
...
Well, the sync is necessary for hibernate - it needs to shrink the
amount of memory that is saved to disk to as small as possible. If
your memory is full of dirty page cache, why would you save that to
the hibernate image, only to have to load it back off, then write it
to the filesystem after resume? Why wouldn't you write it straight
to disk before hibernation, then remove it from memory so you've
then got free memory to allocate the hibernation image that gets
written to disk?
You can see that this happens by looking at the output of "free" before
and after hibernation. Even issuing the command after getting the desktop
back, I can see a big difference (the ammount of buffers and cache).
- --
Cheers,
Carlos E. R.
(from 13.1 x86_64 "Bottle" at Telcontar)
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