From: "Vlastimil Babka (SUSE)" <vbabka@kernel.org>
To: Ye Liu <ye.liu@linux.dev>, Muchun Song <muchun.song@linux.dev>,
Oscar Salvador <osalvador@suse.de>,
Andrew Morton <akpm@linux-foundation.org>,
David Hildenbrand <david@kernel.org>,
Steven Rostedt <rostedt@goodmis.org>,
Masami Hiramatsu <mhiramat@kernel.org>
Cc: Zi Yan <ziy@nvidia.com>, Matthew Brost <matthew.brost@intel.com>,
Joshua Hahn <joshua.hahnjy@gmail.com>,
Rakie Kim <rakie.kim@sk.com>, Byungchul Park <byungchul@sk.com>,
Gregory Price <gourry@gourry.net>,
Ying Huang <ying.huang@linux.alibaba.com>,
Alistair Popple <apopple@nvidia.com>,
Lorenzo Stoakes <ljs@kernel.org>,
"Liam R. Howlett" <liam@infradead.org>,
Mike Rapoport <rppt@kernel.org>,
Suren Baghdasaryan <surenb@google.com>,
Michal Hocko <mhocko@suse.com>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
Brendan Jackman <jackmanb@google.com>,
Johannes Weiner <hannes@cmpxchg.org>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
linux-trace-kernel@vger.kernel.org
Subject: Re: [PATCH v3 3/7] mm: use enum migrate_reason instead of int for migration reason parameters
Date: Tue, 30 Jun 2026 09:30:39 +0200 [thread overview]
Message-ID: <102120c6-e560-4f15-b863-375d45af0ace@kernel.org> (raw)
In-Reply-To: <20260630015331.147174-4-ye.liu@linux.dev>
On 6/30/26 03:53, Ye Liu wrote:
> Replace all 'int reason' function parameters that carry migrate_reason
> values with the proper 'enum migrate_reason' type. This makes the
> intent explicit and leverages compiler type checking. The affected
> subsystems are:
>
> - page_owner: __folio_set_owner_migrate_reason(),
> folio_set_owner_migrate_reason()
> - migrate: migrate_pages(), migrate_pages_sync(),
> migrate_pages_batch(), migrate_folios_move(),
> migrate_hugetlbs(), unmap_and_move_huge_page()
> - hugetlb: move_hugetlb_state(), htlb_allow_alloc_fallback()
> - trace: mm_migrate_pages and mm_migrate_pages_start events
>
> The 'short last_migrate_reason' struct field and internal helper
> parameter in page_owner are intentionally left as 'short' since they
> store per-page metadata where size matters.
>
> No functional change.
>
> Signed-off-by: Ye Liu <ye.liu@linux.dev>
Reviewed-by: Vlastimil Babka (SUSE) <vbabka@kernel.org>
prev parent reply other threads:[~2026-06-30 7:30 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20260630015331.147174-1-ye.liu@linux.dev>
2026-06-30 1:53 ` [PATCH v3 2/7] mm/page_owner: add MR_NEVER to enum migrate_reason and use it for last_migrate_reason Ye Liu
2026-06-30 1:58 ` Zi Yan
2026-06-30 7:28 ` Vlastimil Babka (SUSE)
2026-06-30 1:53 ` [PATCH v3 3/7] mm: use enum migrate_reason instead of int for migration reason parameters Ye Liu
2026-06-30 2:01 ` Zi Yan
2026-06-30 7:30 ` Vlastimil Babka (SUSE) [this message]
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