linux-kernel - Re: [RFC PATCH] zsmalloc: make common caches global

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Message-ID: <2tpqaxgslryp3l4wauf5umuseccpkp3z5l6nuulxfiqzrdflsa@jsddpcvarb3r>
Date: Wed, 21 Jan 2026 10:56:46 +0900
From: Sergey Senozhatsky <senozhatsky@...omium.org>
To: Yosry Ahmed <yosry.ahmed@...ux.dev>
Cc: Sergey Senozhatsky <senozhatsky@...omium.org>, 
	Andrew Morton <akpm@...ux-foundation.org>, Minchan Kim <minchan@...nel.org>, Nhat Pham <nphamcs@...il.com>, 
	Johannes Weiner <hannes@...xchg.org>, Brian Geffon <bgeffon@...gle.com>, linux-kernel@...r.kernel.org, 
	linux-mm@...ck.org
Subject: Re: [RFC PATCH] zsmalloc: make common caches global

On (26/01/21 01:30), Yosry Ahmed wrote:
> 
> That was about ~20 times reduction in waste when using 32 pools with
> zswap. 

Nice, thanks!

> I suspect we wouldn't be using that many pools with zram.

Hard to tell.  We have users that setup many zram devices, even
multiple swap zram devices.  In terms of numbers - I think swap
zram users still setup less devices than users that use zram as
a normal block device (that number in theory can be quite high,
depending on use case).