On (07/07/15 22:39), Minchan Kim wrote:
[..]
> > struct zs_pool_stats {
> > - /* How many objects were migrated */
> > - u64 num_migrated;
> > + /* How many pages were migrated (freed) */
> > + u64 pages_compacted;
>
> Hmm, if we account it as page unit, unsigned long is enough for 32bit.
Well, this is a 'how many pages were freed overall' counter. We don't
control the lifetime of device, so I think it can be bigger than 4 bytes
in some `extreme' cases.
-ss
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