From: "Zi Yan" <ziy@nvidia.com>
To: "Ye Liu" <ye.liu@linux.dev>,
"Andrew Morton" <akpm@linux-foundation.org>,
"David Hildenbrand" <david@kernel.org>,
"Steven Rostedt" <rostedt@goodmis.org>,
"Masami Hiramatsu" <mhiramat@kernel.org>,
"Vlastimil Babka" <vbabka@kernel.org>
Cc: "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>,
"Mathieu Desnoyers" <mathieu.desnoyers@efficios.com>,
"Suren Baghdasaryan" <surenb@google.com>,
"Michal Hocko" <mhocko@suse.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 2/7] mm/page_owner: add MR_NEVER to enum migrate_reason and use it for last_migrate_reason
Date: Mon, 29 Jun 2026 21:58:48 -0400 [thread overview]
Message-ID: <DJM0FXNR6JM1.3ONT2E8UKBA61@nvidia.com> (raw)
In-Reply-To: <20260630015331.147174-3-ye.liu@linux.dev>
On Mon Jun 29, 2026 at 9:53 PM EDT, Ye Liu wrote:
> The last_migrate_reason field uses -1 as a sentinel value to mean "no
> migration has happened". Replace the four bare -1 occurrences by
> adding a proper MR_NEVER member to enum migrate_reason, defining a
> corresponding "never_migrated" string in the MIGRATE_REASON trace
> macro, and removing the local MIGRATE_REASON_NONE define.
>
> No functional change.
>
> Signed-off-by: Ye Liu <ye.liu@linux.dev>
> ---
> include/linux/migrate_mode.h | 1 +
> include/trace/events/migrate.h | 3 ++-
> mm/page_owner.c | 8 ++++----
> 3 files changed, 7 insertions(+), 5 deletions(-)
>
LGTM. Thanks.
Reviewed-by: Zi Yan <ziy@nvidia.com>
--
Best Regards,
Yan, Zi
next prev parent reply other threads:[~2026-06-30 1:58 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 [this message]
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)
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