Re: [PATCH RFC] mm: count zeromap read and set for swapout and swapin

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To: Nhat Pham <nphamcs@xxxxxxxxx>, Barry Song <21cnbao@xxxxxxxxx>
Subject: Re: [PATCH RFC] mm: count zeromap read and set for swapout and swapin
From: David Hildenbrand <david@xxxxxxxxxx>
Date: Mon, 28 Oct 2024 18:17:17 +0100
Cc: akpm@xxxxxxxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, Barry Song <v-songbaohua@xxxxxxxx>, Usama Arif <usamaarif642@xxxxxxxxx>, Chengming Zhou <chengming.zhou@xxxxxxxxx>, Yosry Ahmed <yosryahmed@xxxxxxxxxx>, Johannes Weiner <hannes@xxxxxxxxxxx>, Hugh Dickins <hughd@xxxxxxxxxx>, Matthew Wilcox <willy@xxxxxxxxxxxxx>, Shakeel Butt <shakeel.butt@xxxxxxxxx>, Andi Kleen <ak@xxxxxxxxxxxxxxx>, Baolin Wang <baolin.wang@xxxxxxxxxxxxxxxxx>, Chris Li <chrisl@xxxxxxxxxx>, "Huang, Ying" <ying.huang@xxxxxxxxx>, Kairui Song <kasong@xxxxxxxxxxx>, Ryan Roberts <ryan.roberts@xxxxxxx>
In-reply-to: <CAKEwX=NH9ubWSgKyEJJ0sjxoYXhCV3r4VCJf7UZxHdVX5GDA=Q@mail.gmail.com>
Organization: Red Hat
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On 28.10.24 17:34, Nhat Pham wrote:

On Sun, Oct 27, 2024 at 7:32 PM Barry Song <21cnbao@xxxxxxxxx> wrote:



agree it is better to have a separate counter for zeromap.
then it raises a question: what is the proper name for it :-)

zeromap_swpin, zeromap_swpout seems too long? and zswpin
and zswpout have been used by zswap


Hmmmmm. How about zeroswpin? zeroswpout?

Is this kind of a "swpin_skip" / "swpout_skip" ? Because we optimized itout?


--
Cheers,

David / dhildenb

References:
- [PATCH RFC] mm: count zeromap read and set for swapout and swapin
  - From: Barry Song
- Re: [PATCH RFC] mm: count zeromap read and set for swapout and swapin
  - From: Nhat Pham
- Re: [PATCH RFC] mm: count zeromap read and set for swapout and swapin
  - From: Barry Song
- Re: [PATCH RFC] mm: count zeromap read and set for swapout and swapin
  - From: Nhat Pham

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