From: Rik van Riel <riel@surriel.com>
To: Chris Li <chrisl@kernel.org>, Nhat Pham <nphamcs@gmail.com>
Cc: akpm@linux-foundation.org, kasong@tencent.com,
hannes@cmpxchg.org, mhocko@kernel.org, roman.gushchin@linux.dev,
shakeel.butt@linux.dev, yosry@kernel.org, david@kernel.org,
muchun.song@linux.dev, shikemeng@huaweicloud.com,
baoquan.he@linux.dev, baohua@kernel.org, youngjun.park@lge.com,
chengming.zhou@linux.dev, ljs@kernel.org, liam@infradead.org,
vbabka@kernel.org, rppt@kernel.org, surenb@google.com,
qi.zheng@linux.dev, axelrasmussen@google.com,
yuanchu@google.com, weixugc@google.com, gourry@gourry.net,
haowenchao22@gmail.com, corbet@lwn.net, hughd@google.com,
baolin.wang@linux.alibaba.com, tj@kernel.org, mkoutny@suse.com,
skhan@linuxfoundation.org, kunwu.chan@linux.dev,
kernel-team@meta.com, linux-mm@kvack.org,
linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org,
cgroups@vger.kernel.org
Subject: Re: [PATCH v5 01/11] mm, swap: add virtual swap device infrastructure
Date: Thu, 24 Sep 2026 21:14:37 -0400 [thread overview]
Message-ID: <12541da81f59db27af46096db8da5d425135a162.camel@surriel.com> (raw)
In-Reply-To: <CACePvbVQsHXt4=+qfKz-KTar9CG+3OiAfLd1EZgnRE-1gyoKOQ@mail.gmail.com>
On Thu, 2026-09-24 at 14:43 -1000, Chris Li wrote:
> On Thu, Sep 24, 2026 at 6:20 AM Nhat Pham <nphamcs@gmail.com> wrote:
> >
>
> > It is needed because vswap *is* a special device, with its own
> > requirements. If you don't special case-it, you'd get undesirable
> > behaviors.
>
> Ack, that is why I am against making it a special device. That is the
> whole idea behind xswap. It is just normal swap device implemented
> via
> swap_ops just like ext4 is a file system implemnet on top of VFS.
The filesystem layer is relatively clean because
it has a VFS.
Are you saying it is time we have a similar
abstraction layer on the swap side?
--
All Rights Reversed.
next prev parent reply other threads:[~2026-09-25 1:16 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-18 18:02 [PATCH v5 00/11] Virtual Swap Space (Swap Table Edition) Nhat Pham
2026-09-18 18:02 ` [PATCH v5 01/11] mm, swap: add virtual swap device infrastructure Nhat Pham
2026-09-23 9:18 ` Chris Li
2026-09-24 16:20 ` Nhat Pham
2026-09-25 0:43 ` Chris Li
2026-09-25 1:14 ` Rik van Riel [this message]
2026-09-25 1:20 ` Chris Li
2026-09-24 18:12 ` Rik van Riel
2026-09-25 1:17 ` Chris Li
2026-09-25 1:23 ` Rik van Riel
2026-09-18 18:02 ` [PATCH v5 02/11] mm, swap: support zswap and zero-filled swap pages as vswap backends Nhat Pham
2026-09-18 18:02 ` [PATCH v5 03/11] mm, swap: prepare the swap IO path for vswap Nhat Pham
2026-09-18 18:02 ` [PATCH v5 04/11] mm, swap: support physical swap as a vswap backend Nhat Pham
2026-09-18 18:02 ` [PATCH v5 05/11] mm, swap: enable THP swapin for vswap entries Nhat Pham
2026-09-18 18:02 ` [PATCH v5 06/11] mm, swap: write back vswap zswap entries to physical swap Nhat Pham
2026-09-18 18:02 ` [PATCH v5 07/11] mm, swap: reclaim physical slots backing cache-only vswap entries Nhat Pham
2026-09-18 18:02 ` [PATCH v5 08/11] mm, swap: only charge physical swap entries Nhat Pham
2026-09-18 18:02 ` [PATCH v5 09/11] mm, swap: add debugfs counters for vswap Nhat Pham
2026-09-18 18:02 ` [PATCH v5 10/11] mm, swap: defer memcg_table allocation for physical swap clusters Nhat Pham
2026-09-18 18:02 ` [RFC PATCH v5 11/11] mm, swap: back vswap clusters with a VM_SPARSE array Nhat Pham
2026-09-18 18:38 ` [PATCH v5 00/11] Virtual Swap Space (Swap Table Edition) Nhat Pham
2026-09-21 13:42 ` [syzbot ci] " syzbot ci
2026-09-21 19:00 ` Nhat Pham
2026-09-24 12:54 ` [PATCH v5 00/11] " Klara Modin
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