From: Usama Arif <usama.arif@linux.dev>
To: Zi Yan <ziy@nvidia.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
david@kernel.org, chrisl@kernel.org, kasong@tencent.com,
ljs@kernel.org, Linux Memory Management List <linux-mm@kvack.org>,
ying.huang@linux.alibaba.com, Baoquan He <baoquan.he@linux.dev>,
willy@infradead.org, youngjun.park@lge.com, hannes@cmpxchg.org,
riel@surriel.com, shakeel.butt@linux.dev, alex@ghiti.fr,
kas@kernel.org, baohua@kernel.org, dev.jain@arm.com,
baolin.wang@linux.alibaba.com, npache@redhat.com,
"Liam R. Howlett" <liam@infradead.org>,
ryan.roberts@arm.com, Vlastimil Babka <vbabka@kernel.org>,
lance.yang@linux.dev, linux-kernel@vger.kernel.org,
nphamcs@gmail.com, shikemeng@huaweicloud.com,
kernel-team@meta.com
Subject: Re: [v2 00/16] mm: PMD-level swap entries for anonymous THPs
Date: Sat, 13 Jun 2026 20:34:45 +0100 [thread overview]
Message-ID: <e68d5c68-9b4e-4959-a507-a9f94f3ce6e0@linux.dev> (raw)
In-Reply-To: <6E99CC4E-A026-4DE3-8A5A-34216771F521@nvidia.com>
On 13/06/2026 20:27, Zi Yan wrote:
> On 9 Jun 2026, at 10:29, Usama Arif wrote:
>
>> On 02/06/2026 15:24, Usama Arif wrote:
>>> When reclaim swaps out a PMD-mapped anonymous THP today, the PMD is
>>> split into 512 PTE-level swap entries via TTU_SPLIT_HUGE_PMD before
>>> unmap.
>>>
>>> This series introduces a PMD-level swap entry. The huge mapping is
>>> preserved across the swap round-trip, and do_huge_pmd_swap_page()
>>> resolves the entire 2 MB region in a single fault on swap-in,
>>> no khugepaged involvement is needed. swap_map metadata is identical
>>> either way (512 single-slot counts), so the PTE split buys nothing
>>> on the swap side, it is purely a page-table representation change.
>>>
>>
>> Hello!
>>
>> Just following up if there were any reviews/comments on this series!
>>
>> I know its a large series but was just checking if there was any
>> feedback?
>
> Maybe send first 6 clean-up patches separately to get them merged first?
Good idea! Will do that. Thanks!
>
> --
> Best Regards,
> Yan, Zi
next prev parent reply other threads:[~2026-06-13 19:35 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-06-02 14:24 [v2 00/16] mm: PMD-level swap entries for anonymous THPs Usama Arif
2026-06-02 14:24 ` [v2 01/16] mm: add softleaf_to_pmd() and convert existing callers Usama Arif
2026-06-13 18:52 ` Zi Yan
2026-06-02 14:24 ` [v2 02/16] mm: extract mm_prepare_for_swap_entries() helper Usama Arif
2026-06-13 18:53 ` Zi Yan
2026-06-02 14:24 ` [v2 03/16] fs/proc: use softleaf_has_pfn() in pagemap PMD walker Usama Arif
2026-06-13 19:01 ` Zi Yan
2026-06-02 14:24 ` [v2 04/16] mm/huge_memory: move softleaf_to_folio() inside migration branch Usama Arif
2026-06-13 19:02 ` Zi Yan
2026-06-02 14:24 ` [v2 05/16] mm/migrate_device: move softleaf_to_folio() inside device-private branch Usama Arif
2026-06-13 19:24 ` Zi Yan
2026-06-02 14:24 ` [v2 06/16] mm: rename ARCH_ENABLE_THP_MIGRATION to ARCH_SUPPORTS_PMD_SOFTLEAF Usama Arif
2026-06-13 19:26 ` Zi Yan
2026-06-02 14:24 ` [v2 07/16] mm: add PMD swap entry detection support Usama Arif
2026-06-02 14:24 ` [v2 08/16] mm: add PMD swap entry splitting support Usama Arif
2026-06-02 14:24 ` [v2 09/16] mm: handle PMD swap entries in fork path Usama Arif
2026-06-02 14:24 ` [v2 10/16] mm: swap in PMD swap entries as whole THPs during swapoff Usama Arif
2026-06-02 14:24 ` [v2 11/16] mm: handle PMD swap entries in non-present PMD walkers Usama Arif
2026-06-12 6:45 ` Lance Yang
2026-06-12 15:05 ` Usama Arif
2026-06-12 15:21 ` Lance Yang
2026-06-02 14:24 ` [v2 12/16] mm: handle PMD swap entries in MADV_WILLNEED Usama Arif
2026-06-02 14:24 ` [v2 13/16] mm: handle PMD swap entries in UFFDIO_MOVE Usama Arif
2026-06-12 8:50 ` Lance Yang
2026-06-02 14:24 ` [v2 14/16] mm: handle PMD swap entry faults on swap-in Usama Arif
2026-06-02 14:24 ` [v2 15/16] mm: install PMD swap entries on swap-out Usama Arif
2026-06-12 14:21 ` Lance Yang
2026-06-02 14:24 ` [v2 16/16] selftests/mm: add PMD swap entry tests Usama Arif
2026-06-09 14:29 ` [v2 00/16] mm: PMD-level swap entries for anonymous THPs Usama Arif
2026-06-10 12:24 ` David Hildenbrand (Arm)
2026-06-10 13:01 ` Lance Yang
2026-06-10 13:48 ` David Hildenbrand (Arm)
2026-06-10 14:44 ` Usama Arif
2026-06-13 4:22 ` Lance Yang
2026-06-13 19:18 ` Usama Arif
2026-06-13 19:27 ` Zi Yan
2026-06-13 19:34 ` Usama Arif [this message]
2026-06-13 19:48 ` Usama Arif
2026-06-14 1:48 ` Lance Yang
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