Re: [RFC PATCH] zsmalloc: make common caches global

[Nhat Pham]

On Thu, Jan 15, 2026 at 9:53 PM Sergey Senozhatsky
<senozhatsky@xxxxxxxxxxxx> wrote:
>
> On (26/01/16 13:48), Sergey Senozhatsky wrote:
> > Currently, zsmalloc creates kmem_cache of handles and zspages
> > for each pool, which may be suboptimal from the memory usage
> > point of view (extra internal fragmentation per pool).  Systems
> > that create multiple zsmalloc pools may benefit from shared
> > common zsmalloc caches.
>
> This is step 1.
>
> Step 2 is to look into possibility of sharing zsmalloc pools.
> E.g. if there are N zram devices in the system, do we really need
> N zsmalloc pools?  Can we just share a single pool between them?

Ditto for zswap (although here, we almost always only have a single zswap pool).