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From: SJ Park <sj@kernel.org>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: SJ Park <sj@kernel.org>,
	stable@vger.kernel.org, Usama Arif <usamaarif642@gmail.com>,
	Yueyang Pan <pyyjason@gmail.com>,
	damon@lists.linux.dev, linux-kernel@vger.kernel.org,
	linux-mm@kvack.org
Subject: [PATCH 0/7] damos_apply_scheme() splits a region and apply the action to the
Date: Tue,  1 Sep 2026 06:13:17 -0700	[thread overview]
Message-ID: <20260901131326.97615-1-sj@kernel.org> (raw)

The user impact is not critical.  The failure of damon_split_region_at()
is unlikely since it is arguably too small to fail.  Also DAMOS being
aggressive is limited to the single region.  Users can set
min_nr_regions to set the maximum size of each region.  If it is
reasonably set, the transient overhead shouldn't be critical.

The issue was discovered [1] by Sashiko.

[1] https://lore.kernel.org/20260718171523.87547-1-sj@kernel.org

SJ Park (7):
  mm/damon/paddr: respect folio end for DAMOS_STAT
  mm/damon/paddr: respect folio end for DAMOS actions except STAT
  mm/damon/vaddr: respect folio end for DAMOS_STAT
  mm/damon/vaddr: respect folio end for DAMOS_MIGRATE_{HOT,COLD}
  mm/damon/core: handle extreme memory state in damon_get_node_mem_bp()
  mm/damon/core: handle extreme memory state in get_node_memcg_used_bp()
  mm/damon/core: handle extreme memory state in get_in_active_mem_bp()

 mm/damon/core.c  | 15 ++++++++++++++-
 mm/damon/paddr.c |  8 ++++----
 mm/damon/vaddr.c | 10 ++++++++--
 3 files changed, 26 insertions(+), 7 deletions(-)


base-commit: d93d8b0181065f8375af61e3a18bbc7c066a8159
-- 
2.47.3

             reply	other threads:[~2026-09-01 13:13 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-09-01 13:13 SJ Park [this message]
2026-09-01 13:13 ` [PATCH 1/7] mm/damon/paddr: respect folio end for DAMOS_STAT SJ Park
2026-09-01 13:23   ` sashiko-bot
2026-09-01 13:13 ` [PATCH 2/7] mm/damon/paddr: respect folio end for DAMOS actions except STAT SJ Park
2026-09-01 13:22   ` sashiko-bot
2026-09-01 13:13 ` [PATCH 3/7] mm/damon/vaddr: respect folio end for DAMOS_STAT SJ Park
2026-09-01 13:33   ` sashiko-bot
2026-09-01 13:13 ` [PATCH 4/7] mm/damon/vaddr: respect folio end for DAMOS_MIGRATE_{HOT,COLD} SJ Park
2026-09-01 13:32   ` sashiko-bot
2026-09-01 13:13 ` [PATCH 5/7] mm/damon/core: handle extreme memory state in damon_get_node_mem_bp() SJ Park
2026-09-01 13:41   ` sashiko-bot
2026-09-01 13:13 ` [PATCH 6/7] mm/damon/core: handle extreme memory state in get_node_memcg_used_bp() SJ Park
2026-09-01 13:46   ` sashiko-bot
2026-09-01 13:13 ` [PATCH 7/7] mm/damon/core: handle extreme memory state in get_in_active_mem_bp() SJ Park
2026-09-01 13:56   ` sashiko-bot
2026-09-01 13:16 ` [PATCH 0/7] damos_apply_scheme() splits a region and apply the action to the SJ Park

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