From: "Zi Yan" <ziy@nvidia.com>
To: "Yeoreum Yun" <yeoreum.yun@arm.com>,
"Andrew Morton" <akpm@linux-foundation.org>,
"David Hildenbrand" <david@kernel.org>,
"Lorenzo Stoakes" <ljs@kernel.org>,
"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 v4 1/3] kselftest: mm: prevent random failure of huge page split for khugepaged
Date: Wed, 02 Sep 2026 10:16:51 -0400 [thread overview]
Message-ID: <DL4W7WD7HX8H.2SFIEJUGT6QCA@nvidia.com> (raw)
In-Reply-To: <20260902-fix_split-v4-1-85f03905f7b1@arm.com>
On Wed Sep 2, 2026 at 8:09 AM EDT, Yeoreum Yun wrote:
> There're some random failure for split_huge_page_test when khugepaged
> collapses pages into pmd again which had split by the test.
>
> Prevent the khugepaged's collapses for split page by setting the
> mapped pmd-huge-page with MADV_NOHUGEPAGE before split.
>
> Suggested-by: Kevin Brodsky <kevin.brodsky@arm.com>
> Suggested-by: Lorenzo Stoakes (ARM) <ljs@kernel.org>
> Signed-off-by: Yeoreum Yun <yeoreum.yun@arm.com>
> ---
> tools/testing/selftests/mm/split_huge_page_test.c | 19 +++++++++++++++++++
> 1 file changed, 19 insertions(+)
>
LGTM.
Reviewed-by: Zi Yan <ziy@nvidia.com>
--
Best Regards,
Yan, Zi
next prev parent reply other threads:[~2026-09-02 14:17 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-02 12:09 [PATCH v4 0/3] kselftest: mm: fix some failure of split_huge_page_test Yeoreum Yun
2026-09-02 12:09 ` [PATCH v4 1/3] kselftest: mm: prevent random failure of huge page split for khugepaged Yeoreum Yun
2026-09-02 14:16 ` Zi Yan [this message]
2026-09-02 15:15 ` Lorenzo Stoakes (ARM)
2026-09-02 15:16 ` Lorenzo Stoakes (ARM)
2026-09-02 15:33 ` Yeoreum Yun
2026-09-02 12:09 ` [PATCH v4 2/3] kselftest: mm: replace usage of /proc/self/smaps for check_huge_xxx() helper Yeoreum Yun
2026-09-02 12:09 ` [PATCH v4 3/3] kselftest: mm: introduce alloc_isolated_mem() Yeoreum Yun
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