Re: [PATCH RFC 03/29] mm/zsmalloc: drop PageIsolated() related VM_BUG_ONs

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To: David Hildenbrand <david@xxxxxxxxxx>
Subject: Re: [PATCH RFC 03/29] mm/zsmalloc: drop PageIsolated() related VM_BUG_ONs
From: Sergey Senozhatsky <senozhatsky@xxxxxxxxxxxx>
Date: Thu, 19 Jun 2025 11:44:40 +0900
Cc: linux-kernel@xxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, linux-doc@xxxxxxxxxxxxxxx, linuxppc-dev@xxxxxxxxxxxxxxxx, virtualization@xxxxxxxxxxxxxxx, linux-fsdevel@xxxxxxxxxxxxxxx, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Jonathan Corbet <corbet@xxxxxxx>, Madhavan Srinivasan <maddy@xxxxxxxxxxxxx>, Michael Ellerman <mpe@xxxxxxxxxxxxxx>, Nicholas Piggin <npiggin@xxxxxxxxx>, Christophe Leroy <christophe.leroy@xxxxxxxxxx>, Jerrin Shaji George <jerrin.shaji-george@xxxxxxxxxxxx>, Arnd Bergmann <arnd@xxxxxxxx>, Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>, "Michael S. Tsirkin" <mst@xxxxxxxxxx>, Jason Wang <jasowang@xxxxxxxxxx>, Xuan Zhuo <xuanzhuo@xxxxxxxxxxxxxxxxx>, Eugenio Pérez <eperezma@xxxxxxxxxx>, Alexander Viro <viro@xxxxxxxxxxxxxxxxxx>, Christian Brauner <brauner@xxxxxxxxxx>, Jan Kara <jack@xxxxxxx>, Zi Yan <ziy@xxxxxxxxxx>, Matthew Brost <matthew.brost@xxxxxxxxx>, Joshua Hahn <joshua.hahnjy@xxxxxxxxx>, Rakie Kim <rakie.kim@xxxxxx>, Byungchul Park <byungchul@xxxxxx>, Gregory Price <gourry@xxxxxxxxxx>, Ying Huang <ying.huang@xxxxxxxxxxxxxxxxx>, Alistair Popple <apopple@xxxxxxxxxx>, Lorenzo Stoakes <lorenzo.stoakes@xxxxxxxxxx>, "Liam R. Howlett" <Liam.Howlett@xxxxxxxxxx>, Vlastimil Babka <vbabka@xxxxxxx>, Mike Rapoport <rppt@xxxxxxxxxx>, Suren Baghdasaryan <surenb@xxxxxxxxxx>, Michal Hocko <mhocko@xxxxxxxx>, "Matthew Wilcox (Oracle)" <willy@xxxxxxxxxxxxx>, Minchan Kim <minchan@xxxxxxxxxx>, Sergey Senozhatsky <senozhatsky@xxxxxxxxxxxx>, Brendan Jackman <jackmanb@xxxxxxxxxx>, Johannes Weiner <hannes@xxxxxxxxxxx>, Jason Gunthorpe <jgg@xxxxxxxx>, John Hubbard <jhubbard@xxxxxxxxxx>, Peter Xu <peterx@xxxxxxxxxx>, Xu Xin <xu.xin16@xxxxxxxxxx>, Chengming Zhou <chengming.zhou@xxxxxxxxx>, Miaohe Lin <linmiaohe@xxxxxxxxxx>, Naoya Horiguchi <nao.horiguchi@xxxxxxxxx>, Oscar Salvador <osalvador@xxxxxxx>, Rik van Riel <riel@xxxxxxxxxxx>, Harry Yoo <harry.yoo@xxxxxxxxxx>, Qi Zheng <zhengqi.arch@xxxxxxxxxxxxx>, Shakeel Butt <shakeel.butt@xxxxxxxxx>
In-reply-to: <20250618174014.1168640-4-david@redhat.com>
References: <20250618174014.1168640-1-david@redhat.com> <20250618174014.1168640-4-david@redhat.com>

On (25/06/18 19:39), David Hildenbrand wrote:
> Let's drop these checks; these are conditions the core migration code
> must make sure will hold either way, no need to double check.
> 
> Signed-off-by: David Hildenbrand <david@xxxxxxxxxx>

Reviewed-by: Sergey Senozhatsky <senozhatsky@xxxxxxxxxxxx>

References:
- [PATCH RFC 00/29] mm/migration: rework movable_ops page migration (part 1)
  - From: David Hildenbrand
- [PATCH RFC 03/29] mm/zsmalloc: drop PageIsolated() related VM_BUG_ONs
  - From: David Hildenbrand

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