linux-kernel - Re: [PATCH v8 3/8] mm: zswap: Rename zswap_pool_get() to zswap_pool

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Message-ID: <CAKEwX=Nyvrub+wL7Tn9pSJms=d3_U-8SVmcm0N5DJWfW-DBUeg@mail.gmail.com>
Date: Sat, 28 Sep 2024 16:26:30 -0700
From: Nhat Pham <nphamcs@...il.com>
To: Kanchana P Sridhar <kanchana.p.sridhar@...el.com>
Cc: linux-kernel@...r.kernel.org, linux-mm@...ck.org, hannes@...xchg.org, 
	yosryahmed@...gle.com, chengming.zhou@...ux.dev, usamaarif642@...il.com, 
	shakeel.butt@...ux.dev, ryan.roberts@....com, ying.huang@...el.com, 
	21cnbao@...il.com, akpm@...ux-foundation.org, nanhai.zou@...el.com, 
	wajdi.k.feghali@...el.com, vinodh.gopal@...el.com
Subject: Re: [PATCH v8 3/8] mm: zswap: Rename zswap_pool_get() to zswap_pool_tryget().

On Fri, Sep 27, 2024 at 7:16 PM Kanchana P Sridhar
<kanchana.p.sridhar@...el.com> wrote:
>
> Modify the name of the existing zswap_pool_get() to zswap_pool_tryget()
> to be representative of the call it makes to percpu_ref_tryget().
> A subsequent patch will introduce a new zswap_pool_get() that calls
> percpu_ref_get().
>
> The intent behind this change is for higher level zswap API such as
> zswap_store() to call zswap_pool_tryget() to check upfront if the pool's
> refcount is "0" (which means it could be getting destroyed) and to handle
> this as an error condition. zswap_store() would proceed only if
> zswap_pool_tryget() returns success, and any additional pool refcounts that
> need to be obtained for compressing sub-pages in a large folio could simply
> call zswap_pool_get().
>
> Signed-off-by: Kanchana P Sridhar <kanchana.p.sridhar@...el.com>

Reviewed-by: Nhat Pham <nphamcs@...il.com>