From: Johannes Weiner <hannes@cmpxchg.org>
To: SeongJae Park <sj@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
David Hildenbrand <david@kernel.org>,
Lorenzo Stoakes <ljs@kernel.org>,
Shakeel Butt <shakeel.butt@linux.dev>,
Michal Hocko <mhocko@kernel.org>,
Dave Chinner <david@fromorbit.com>,
Roman Gushchin <roman.gushchin@linux.dev>,
Muchun Song <muchun.song@linux.dev>,
Qi Zheng <qi.zheng@linux.dev>,
Yosry Ahmed <yosry.ahmed@linux.dev>, Zi Yan <ziy@nvidia.com>,
"Liam R . Howlett" <liam@infradead.org>,
Usama Arif <usama.arif@linux.dev>,
Kiryl Shutsemau <kas@kernel.org>,
Vlastimil Babka <vbabka@kernel.org>,
Kairui Song <ryncsn@gmail.com>,
Mikhail Zaslonko <zaslonko@linux.ibm.com>,
Vasily Gorbik <gor@linux.ibm.com>,
Baolin Wang <baolin.wang@linux.alibaba.com>,
Barry Song <baohua@kernel.org>, Dev Jain <dev.jain@arm.com>,
Lance Yang <lance.yang@linux.dev>, Nico Pache <npache@redhat.com>,
Ryan Roberts <ryan.roberts@arm.com>,
cgroups@vger.kernel.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v5 9/9] mm: switch deferred split shrinker to list_lru
Date: Thu, 28 May 2026 10:03:12 -0400 [thread overview]
Message-ID: <ahhLIBSC7rxgXSEU@cmpxchg.org> (raw)
In-Reply-To: <20260528070807.144064-1-sj@kernel.org>
On Thu, May 28, 2026 at 12:08:05AM -0700, SeongJae Park wrote:
> From 23b5800dd49085707baee5774b74782c3e424f24 Mon Sep 17 00:00:00 2001
> From: SeongJae Park <sj@kernel.org>
> Date: Wed, 27 May 2026 23:58:07 -0700
> Subject: [PATCH] mm/huge_mm: define memcg_alloc_deferred() for
> !CONFIG_TRANSPARENT_HUGEPPAGE
> MIME-Version: 1.0
> Content-Type: text/plain; charset=UTF-8
> Content-Transfer-Encoding: 8bit
>
> Without this, UM mode kunit fails like below.
>
> $ ./tools/testing/kunit/kunit.py run --kunitconfig mm/damon/tests/
> [00:00:02] Configuring KUnit Kernel ...
> [00:00:02] Building KUnit Kernel ...
> Populating config with:
> $ make ARCH=um O=.kunit olddefconfig
> Building with:
> $ make all compile_commands.json scripts_gdb ARCH=um O=.kunit --jobs=8
> ERROR:root:../mm/swap_state.c: In function ‘__swap_cache_alloc’:
> ../mm/swap_state.c:468:26: error: implicit declaration of function ‘folio_memcg_alloc_deferred’ [-Wimplicit-function-declaration]
> 468 | if (order > 1 && folio_memcg_alloc_deferred(folio)) {
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~
> make[4]: *** [../scripts/Makefile.build:289: mm/swap_state.o] Error 1
> make[4]: *** Waiting for unfinished jobs....
> make[3]: *** [../scripts/Makefile.build:548: mm] Error 2
> make[3]: *** Waiting for unfinished jobs....
> make[2]: *** [/home/lkhack/linux/Makefile:2143: .] Error 2
> make[1]: *** [/home/lkhack/linux/Makefile:248: __sub-make] Error 2
> make: *** [Makefile:248: __sub-make] Error 2
>
> Fix by implementing the function for CONFIG_TRANSPARENT_HUGEPPAGE unset
> case.
>
> Fixes: https://lore.kernel.org/20260527204757.2544958-10-hannes@cmpxchg.org
> Signed-off-by: SeongJae Park <sj@kernel.org>
Whoops, thanks for the fix, SJ. I'll incorporate UM builds into my
final compile test before sending.
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
next prev parent reply other threads:[~2026-05-28 14:03 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-27 20:45 [PATCH v5 0/9] mm: switch THP shrinker to list_lru Johannes Weiner
2026-05-27 20:45 ` [PATCH v5 1/9] mm: list_lru: fix set_shrinker_bit() call during race with cgroup deletion Johannes Weiner
2026-05-28 13:25 ` Usama Arif
2026-05-27 20:45 ` [PATCH v5 2/9] mm: list_lru: lock_list_lru_of_memcg() cannot return NULL if !skip_empty Johannes Weiner
2026-05-27 20:45 ` [PATCH v5 3/9] mm: list_lru: deduplicate unlock_list_lru() Johannes Weiner
2026-05-27 20:45 ` [PATCH v5 4/9] mm: list_lru: move list dead check to lock_list_lru_of_memcg() Johannes Weiner
2026-05-27 20:45 ` [PATCH v5 5/9] mm: list_lru: deduplicate lock_list_lru() Johannes Weiner
2026-05-29 9:56 ` Wei Yang
2026-05-29 13:42 ` Johannes Weiner
2026-05-27 20:45 ` [PATCH v5 6/9] mm: list_lru: introduce caller locking for additions and deletions Johannes Weiner
2026-05-27 20:45 ` [PATCH v5 7/9] mm: list_lru: introduce folio_memcg_list_lru_alloc() Johannes Weiner
2026-05-27 20:45 ` [PATCH v5 8/9] mm: memory: flatten alloc_anon_folio() retry loop Johannes Weiner
2026-05-27 20:45 ` [PATCH v5 9/9] mm: switch deferred split shrinker to list_lru Johannes Weiner
2026-05-28 7:08 ` SeongJae Park
2026-05-28 14:03 ` Johannes Weiner [this message]
2026-05-28 13:32 ` Usama Arif
2026-05-28 14:02 ` Johannes Weiner
2026-05-28 15:31 ` Usama Arif
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