From: Barry Song <21cnbao@gmail.com>
To: Chris Li <chrisl@kernel.org>
Cc: Kairui Song <ryncsn@gmail.com>,
linux-mm@kvack.org, Andrew Morton <akpm@linux-foundation.org>,
Matthew Wilcox <willy@infradead.org>,
Hugh Dickins <hughd@google.com>, Baoquan He <bhe@redhat.com>,
Nhat Pham <nphamcs@gmail.com>,
Kemeng Shi <shikemeng@huaweicloud.com>,
Baolin Wang <baolin.wang@linux.alibaba.com>,
Ying Huang <ying.huang@linux.alibaba.com>,
Johannes Weiner <hannes@cmpxchg.org>,
David Hildenbrand <david@redhat.com>,
Yosry Ahmed <yosryahmed@google.com>,
Lorenzo Stoakes <lorenzo.stoakes@oracle.com>,
Zi Yan <ziy@nvidia.com>,
linux-kernel@vger.kernel.org, Kairui Song <kasong@tencent.com>
Subject: Re: [PATCH v4 01/15] docs/mm: add document for swap table
Date: Fri, 19 Sep 2025 05:35:29 +0800 [thread overview]
Message-ID: <CAGsJ_4zB4ygGCN4JTx+AW+XAUm8WtFVLVesStuDHc8S-HT0ihQ@mail.gmail.com> (raw)
In-Reply-To: <CACePvbXae0zymE_BHydXtA_pjZ2NqabVyqxu1xKxLjLKmeYH9g@mail.gmail.com>
> > I’m not entirely sure what you mean by “page table page.”
>
> The page that gets pointed by the page table, or the page that holds the PTE.
>
> > My understanding is that you’re saying:
> > The swap table contains an array of pointers, each the same size as a PTE,
> > so its total size typically matches a PTE page table—one page on modern
> > 64-bit systems.
>
> That sounds good. Thanks for the suggestion.
> I take your suggestion with some small modifications, mostly to
> clarify the total size is the total size of one cluster of swap
> tables. The total size of all swap tables in a swap file is much
> bigger.
>
> How about this:
>
> A swap table is an array of pointers. Each pointer is the same size as a PTE.
> The size of a swap table for one swap cluster typically matches a PTE
> page table,
> which is one page on modern 64-bit systems.
Acked.
>
> Chris
Thanks
Barry
next prev parent reply other threads:[~2025-09-18 21:35 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-09-16 16:00 [PATCH v4 00/15] mm, swap: introduce swap table as swap cache (phase I) Kairui Song
2025-09-16 16:00 ` [PATCH v4 01/15] docs/mm: add document for swap table Kairui Song
2025-09-16 21:59 ` Barry Song
2025-09-16 22:42 ` Chris Li
2025-09-16 23:09 ` Barry Song
2025-09-16 23:28 ` Chris Li
2025-09-16 23:47 ` Barry Song
2025-09-17 16:48 ` Chris Li
2025-09-17 23:37 ` Barry Song
2025-09-17 23:50 ` Barry Song
2025-09-18 4:50 ` Chris Li
2025-09-18 5:03 ` Chris Li
2025-09-18 7:03 ` Chris Li
2025-09-18 8:58 ` Barry Song
2025-09-18 14:19 ` Chris Li
2025-09-18 21:35 ` Barry Song [this message]
2025-09-21 0:11 ` Chris Li
2025-09-17 16:14 ` SeongJae Park
2025-09-17 17:12 ` Chris Li
2025-09-16 16:00 ` [PATCH v4 02/15] mm, swap: use unified helper for swap cache look up Kairui Song
2025-09-16 16:00 ` [PATCH v4 03/15] mm, swap: fix swap cache index error when retrying reclaim Kairui Song
2025-09-16 16:00 ` [PATCH v4 04/15] mm, swap: check page poison flag after locking it Kairui Song
2025-09-16 16:00 ` [PATCH v4 05/15] mm, swap: always lock and check the swap cache folio before use Kairui Song
2025-09-17 23:54 ` Barry Song
2025-09-16 16:00 ` [PATCH v4 06/15] mm, swap: rename and move some swap cluster definition and helpers Kairui Song
2025-09-19 22:02 ` Nhat Pham
2025-09-16 16:00 ` [PATCH v4 07/15] mm, swap: tidy up swap device and cluster info helpers Kairui Song
2025-09-16 16:00 ` [PATCH v4 08/15] mm, swap: cleanup swap cache API and add kerneldoc Kairui Song
2025-09-16 16:00 ` [PATCH v4 09/15] mm/shmem, swap: remove redundant error handling for replacing folio Kairui Song
2025-09-24 21:55 ` Chris Li
2025-09-16 16:00 ` [PATCH v4 10/15] mm, swap: wrap swap cache replacement with a helper Kairui Song
2025-09-16 16:00 ` [PATCH v4 11/15] mm, swap: use the swap table for the swap cache and switch API Kairui Song
2025-09-16 16:00 ` [PATCH v4 12/15] mm, swap: mark swap address space ro and add context debug check Kairui Song
2025-09-16 16:00 ` [PATCH v4 13/15] mm, swap: remove contention workaround for swap cache Kairui Song
2025-09-16 16:00 ` [PATCH v4 14/15] mm, swap: implement dynamic allocation of swap table Kairui Song
2025-09-16 22:51 ` Barry Song
2025-09-24 21:51 ` Chris Li
2025-09-16 16:01 ` [PATCH v4 15/15] mm, swap: use a single page for swap table when the size fits Kairui Song
2025-09-16 22:30 ` Barry Song
2025-09-17 3:52 ` Kairui Song
2025-09-17 4:41 ` Barry Song
2025-09-17 4:50 ` Barry Song
2025-09-16 21:22 ` [PATCH v4 00/15] mm, swap: introduce swap table as swap cache (phase I) Hugh Dickins
2025-09-17 3:53 ` Kairui Song
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