From: "David Hildenbrand (Arm)" <david@kernel.org>
To: Yeoreum Yun <yeoreum.yun@arm.com>,
Andrew Morton <akpm@linux-foundation.org>,
Lorenzo Stoakes <ljs@kernel.org>, Zi Yan <ziy@nvidia.com>,
Baolin Wang <baolin.wang@linux.alibaba.com>,
"Liam R. Howlett" <liam@infradead.org>,
Nico Pache <nico.pache@linux.dev>,
Ryan Roberts <ryan.roberts@arm.com>, Dev Jain <dev.jain@arm.com>,
Barry Song <baohua@kernel.org>, Lance Yang <lance.yang@linux.dev>,
Usama Arif <usama.arif@linux.dev>,
Vlastimil Babka <vbabka@kernel.org>,
Mike Rapoport <rppt@kernel.org>,
Suren Baghdasaryan <surenb@google.com>,
Michal Hocko <mhocko@suse.com>, Shuah Khan <shuah@kernel.org>,
Kevin Brodsky <kevin.brodsky@arm.com>
Cc: linux-mm@kvack.org, linux-kselftest@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v7 3/3] kselftest: mm: remove check_huge_shmem()
Date: Mon, 21 Sep 2026 17:28:20 +0200 [thread overview]
Message-ID: <650657d9-630b-4338-b7e5-8f12e4c59efe@kernel.org> (raw)
In-Reply-To: <20260921-fix_split-v7-3-d25ec991159f@arm.com>
On 9/21/26 12:40, Yeoreum Yun wrote:
> check_huge_shmem() was required to distinguish shmem huge pages because
> /proc/self/smaps reports them using a dedicated “ShmemPmdMapped” entry,
> as opposed to “FilePmdMapped” for file-backed huge pages.
>
> Now that /proc/self/smaps is no longer used to detect huge pages and
> /proc/kpageflags is used instead, it is sufficient to distinguish
> between file-backed and anonymous pages since the ShmemPmdMapped is also
> kind of file-backed.
>
> Therefore, remove check_huge_shmem() and use check_huge_file() instead
> and cleanup khugepaged's check_huge operation in mem_ops.
>
> Suggested-by: David Hildenbrand (Arm) <david@kernel.org>
> Signed-off-by: Yeoreum Yun <yeoreum.yun@arm.com>
> ---
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
--
Cheers,
David
next prev parent reply other threads:[~2026-09-21 15:31 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-21 10:40 [PATCH v7 0/3] kselftest: mm: fix some failure of split_huge_page_test Yeoreum Yun
2026-09-21 10:40 ` [PATCH v7 1/3] kselftest: mm: prevent random failure of huge page split for khugepaged Yeoreum Yun
2026-09-21 10:40 ` [PATCH v7 2/3] kselftest: mm: replace usage of /proc/self/smaps for check_huge_xxx() helper Yeoreum Yun
2026-09-21 15:27 ` David Hildenbrand (Arm)
2026-09-21 18:48 ` Yeoreum Yun
2026-09-21 21:05 ` David Hildenbrand (Arm)
2026-09-22 7:00 ` Yeoreum Yun
2026-09-21 10:40 ` [PATCH v7 3/3] kselftest: mm: remove check_huge_shmem() Yeoreum Yun
2026-09-21 15:28 ` David Hildenbrand (Arm) [this message]
2026-09-21 15:47 ` Lorenzo Stoakes (ARM)
2026-09-22 1:31 ` Zi Yan
2026-09-23 3:11 ` Baolin Wang
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