From: sashiko-bot@kernel.org
To: "Gregory Price (Meta)" <gourry@gourry.net>
Cc: linux-serial@vger.kernel.org, damon@lists.linux.dev
Subject: Re: [PATCH 12/22] mm/damon: restrict DAMON-native folio operations to common memory
Date: Sat, 14 Nov 2026 07:15:38 +0000 [thread overview]
Message-ID: <sashiko-outbox-214243@kernel.org> (raw)
In-Reply-To: <20261114070959.3490008-13-gourry@gourry.net>
> DAMON acquires folios to age them, check their accesses, and apply LRU
> operations and migration. Treat these as general-purpose MM services
> and restrict them to N_MEMORY_COMMON.
>
> Memory outside N_MEMORY_COMMON can still hold ordinary LRU folios, so
> it would pass the checks that keep ZONE_DEVICE memory out of these
> operations.
>
> Treat these folios like ZONE_DEVICE memory.
>
> DAMON cannot acquire such a folio, so it never ages one and virtual
> address monitoring reports it as accessed, and DAMOS cannot isolate
> one for migration.
>
> Reject migration destinations outside N_MEMORY_COMMON.
>
> All memory is common at this point, so behavior is unchanged.
>
> Signed-off-by: Gregory Price (Meta) <gourry@gourry.net>
Sashiko has reviewed this patch and found no issues.
--
Sashiko AI review · https://sashiko.dev/#/patchset/20261114070959.3490008-1-gourry@gourry.net?part=12
next prev parent reply other threads:[~2026-11-14 7:15 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-14 7:09 [PATCH 00/22] mm: introduce N_MEMORY_COMMON Gregory Price (Meta)
2026-11-14 7:09 ` [PATCH 01/22] mm: add node-state-filtered zone and node iterators Gregory Price (Meta)
2026-11-14 7:19 ` sashiko-bot
2026-11-14 7:09 ` [PATCH 02/22] mm: publish and clear node memory states via helpers Gregory Price (Meta)
2026-11-14 7:20 ` sashiko-bot
2026-11-14 7:09 ` [PATCH 03/22] mm: introduce the common-memory node state Gregory Price (Meta)
2026-11-14 7:17 ` sashiko-bot
2026-11-14 7:09 ` [PATCH 04/22] mm/page_alloc: build zonelists from common memory Gregory Price (Meta)
2026-11-14 7:16 ` sashiko-bot
2026-11-14 7:09 ` [PATCH 05/22] mm/mempolicy: keep interleave and tmpfs mount policies on " Gregory Price (Meta)
2026-11-14 7:18 ` sashiko-bot
2026-11-14 7:09 ` [PATCH 06/22] mm: base hash distribution on common memory nodes Gregory Price (Meta)
2026-11-14 7:15 ` sashiko-bot
2026-11-14 7:09 ` [PATCH 07/22] mm/memory_hotplug: migrate offlined pages to common memory Gregory Price (Meta)
2026-11-14 7:16 ` sashiko-bot
2026-11-14 7:09 ` [PATCH 08/22] mm/memory-tiers: restrict demotion topology " Gregory Price (Meta)
2026-11-14 7:16 ` sashiko-bot
2026-11-14 7:09 ` [PATCH 09/22] mm/ksm: restrict merging " Gregory Price (Meta)
2026-11-14 7:20 ` sashiko-bot
2026-11-14 7:09 ` [PATCH 10/22] mm/khugepaged: restrict collapse " Gregory Price (Meta)
2026-11-14 7:21 ` sashiko-bot
2026-11-14 7:21 ` sashiko-bot
2026-11-14 7:35 ` Gregory Price (Meta)
2026-11-14 7:09 ` [PATCH 11/22] mm/mempolicy: don't NUMA-hint folios outside " Gregory Price (Meta)
2026-11-14 7:16 ` sashiko-bot
2026-11-14 7:09 ` [PATCH 12/22] mm/damon: restrict DAMON-native folio operations to " Gregory Price (Meta)
2026-11-14 7:15 ` sashiko-bot [this message]
2026-11-14 7:09 ` [PATCH 13/22] mm/hugetlb: restrict pool growth " Gregory Price (Meta)
2026-11-14 7:18 ` sashiko-bot
2026-11-14 7:09 ` [PATCH 14/22] mm/page_alloc: count common memory nodes for kswapd recovery Gregory Price (Meta)
2026-11-14 7:18 ` sashiko-bot
2026-11-14 7:09 ` [PATCH 15/22] mm/oom_kill: compare OOM constraints against common memory Gregory Price (Meta)
2026-11-14 7:19 ` sashiko-bot
2026-11-14 7:09 ` [PATCH 16/22] tty/sysrq: use common memory for the manual OOM zonelist Gregory Price (Meta)
2026-11-14 7:19 ` sashiko-bot
2026-11-14 7:09 ` [PATCH 17/22] mm/vmscan: restrict reclaim to common memory Gregory Price (Meta)
2026-11-14 7:22 ` sashiko-bot
2026-11-14 7:09 ` [PATCH 18/22] mm/compaction: restrict compaction " Gregory Price (Meta)
2026-11-14 7:19 ` sashiko-bot
2026-11-14 7:09 ` [PATCH 19/22] mm/migrate: restrict move_pages() destinations " Gregory Price (Meta)
2026-11-14 7:20 ` sashiko-bot
2026-11-14 7:09 ` [PATCH 20/22] PM: hibernate: size the image from " Gregory Price (Meta)
2026-11-14 7:34 ` sashiko-bot
2026-11-14 7:34 ` sashiko-bot
2026-11-14 7:09 ` [PATCH 21/22] mm/khugepaged: base the recommended min_free_kbytes on " Gregory Price (Meta)
2026-11-14 7:20 ` sashiko-bot
2026-11-14 7:09 ` [PATCH 22/22] nodemask: remove the now-unused first_memory_node/next_memory_node Gregory Price (Meta)
2026-11-14 7:19 ` sashiko-bot
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