RE: [PATCH v5 0/3] mm: ZSWAP swap-out of mTHP folios

[Sridhar, Kanchana P]

> -----Original Message-----
> From: Nhat Pham <nphamcs@xxxxxxxxx>
> Sent: Wednesday, August 28, 2024 10:24 AM
> To: Sridhar, Kanchana P <kanchana.p.sridhar@xxxxxxxxx>
> Cc: linux-kernel@xxxxxxxxxxxxxxx; linux-mm@xxxxxxxxx;
> hannes@xxxxxxxxxxx; yosryahmed@xxxxxxxxxx; ryan.roberts@xxxxxxx;
> Huang, Ying <ying.huang@xxxxxxxxx>; 21cnbao@xxxxxxxxx; akpm@linux-
> foundation.org; Zou, Nanhai <nanhai.zou@xxxxxxxxx>; Feghali, Wajdi K
> <wajdi.k.feghali@xxxxxxxxx>; Gopal, Vinodh <vinodh.gopal@xxxxxxxxx>
> Subject: Re: [PATCH v5 0/3] mm: ZSWAP swap-out of mTHP folios
> 
> On Wed, Aug 28, 2024 at 8:55 AM Nhat Pham <nphamcs@xxxxxxxxx> wrote:
> >
> > better by definition... I wonder if lowering the memory limit even
> > further would show positive numbers? Or
> 
> ... perhaps with a workload that has less cold data? or using the
> zswap shrinker to off load some of these cold objects to swap?
> 
> Food for thought :)

This makes sense. Given the nature of this workload wherein it makes
a one-time read/write access to each 8-bytes chunk in the mmap-ed
region, this would be a good use-case to try with the zswap shrinker enabled.
I can run some experiments and share the results.

Thanks,
Kanchana