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Date: Wed, 6 Nov 2024 14:02:11 -0800
From: Andrew Morton <akpm@linux-foundation.org>
To: Barry Song <21cnbao@gmail.com>
Cc: Kanchana P Sridhar <kanchana.p.sridhar@intel.com>, Johannes Weiner
 <hannes@cmpxchg.org>, linux-mm@kvack.org, linux-kernel@vger.kernel.org,
 Barry Song <v-songbaohua@oppo.com>, Nhat Pham <nphamcs@gmail.com>, Usama
 Arif <usamaarif642@gmail.com>, Chengming Zhou <chengming.zhou@linux.dev>,
 Yosry Ahmed <yosryahmed@google.com>, Hailong Liu <hailong.liu@oppo.com>,
 David Hildenbrand <david@redhat.com>, Hugh Dickins <hughd@google.com>,
 Matthew Wilcox <willy@infradead.org>, Shakeel Butt
 <shakeel.butt@linux.dev>, Andi Kleen <ak@linux.intel.com>, Baolin Wang
 <baolin.wang@linux.alibaba.com>, Chris Li <chrisl@kernel.org>,
 "Huang, Ying" <ying.huang@intel.com>, Kairui Song <kasong@tencent.com>,
 Ryan Roberts <ryan.roberts@arm.com>
Subject: Re: [PATCH v3] mm: count zeromap read and set for swapout and
 swapin
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On Thu, 7 Nov 2024 10:53:11 +1300 Barry Song <21cnbao@gmail.com> wrote:

> 
> Kanchana's commit 'mm: change count_objcg_event() to count_objcg_events()'
> changes count_objcg_event() to count_objcg_events() and supports
> nr_pages more than 1. This is what we need for the minimal patch of
> fixing zeromap
> as zeromap could be nr_pages > 1 for large folios.
> 
> So my question is that, do I combine Kanchana's change into my patch
> and send a single patch, or do I send a patch series with 2 patches:
> 
> 1: Kanchana's mm: change count_objcg_event() to count_objcg_events()
> 2: mm: count zeromap read and set for swapout and swapin

A single self-contained backportable patch is preferable, please.

> If we combine them into a single patch, I'll need to incorporate the changes
> from 1 into 2. I'm also unsure how to acknowledge Kanchana's contribution
> —perhaps mark it as co-developed?

Sure.