linux-kernel - Re: [PATCH 1/1] mm: swap: add nr argument in swapcache_prepare and swapcache

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Message-ID: <f7524eeb-7e94-48aa-a3f6-543ba6a8a5b6@redhat.com>
Date: Tue, 30 Jul 2024 09:42:10 +0200
From: David Hildenbrand <david@...hat.com>
To: Barry Song <21cnbao@...il.com>, akpm@...ux-foundation.org,
 linux-mm@...ck.org
Cc: baolin.wang@...ux.alibaba.com, chrisl@...nel.org, hannes@...xchg.org,
 hughd@...gle.com, kaleshsingh@...gle.com, kasong@...cent.com,
 linux-kernel@...r.kernel.org, mhocko@...e.com, minchan@...nel.org,
 nphamcs@...il.com, ryan.roberts@....com, senozhatsky@...omium.org,
 shakeel.butt@...ux.dev, shy828301@...il.com, surenb@...gle.com,
 v-songbaohua@...o.com, willy@...radead.org, xiang@...nel.org,
 ying.huang@...el.com, yosryahmed@...gle.com
Subject: Re: [PATCH 1/1] mm: swap: add nr argument in swapcache_prepare and
 swapcache_clear to support large folios

On 30.07.24 09:13, Barry Song wrote:
> From: Barry Song <v-songbaohua@...o.com>
> 
> Right now, swapcache_prepare() and swapcache_clear() supports one entry
> only, to support large folios, we need to handle multiple swap entries.
> 
> To optimize stack usage, we iterate twice in __swap_duplicate(): the
> first time to verify that all entries are valid, and the second time
> to apply the modifications to the entries.
> 
> Currently, we're using nr=1 for the existing users.
> 
> Reviewed-by: Baolin Wang <baolin.wang@...ux.alibaba.com>
> Signed-off-by: Barry Song <v-songbaohua@...o.com>
> ---


Acked-by: David Hildenbrand <david@...hat.com>

-- 
Cheers,

David / dhildenb