Re: [PATCH 1/2] mm/zsmalloc: fix class per-fullness zspage counts

[Sergey Senozhatsky]

On (24/06/27 15:59), Chengming Zhou wrote:
> We always use insert_zspage() and remove_zspage() to update zspage's
> fullness location, which will account correctly.
> 
> But this special async free path use "splice" instead of remove_zspage(),
> so the per-fullness zspage count for ZS_INUSE_RATIO_0 won't decrease.
> 
> Fix it by decreasing when iterate over the zspage free list.

So this doesn't fix anything.  ZS_INUSE_RATIO_0 is just a "placeholder"
which is never used anywhere.

We can land this patch, if you insist/prefer, but it's some sort of
a NOOP, essentially (in a sense that it has no visible effects).