From: Dan Williams <dan.j.williams@intel.com>
To: Joao Martins <joao.m.martins@oracle.com>
Cc: Linux MM <linux-mm@kvack.org>, Ira Weiny <ira.weiny@intel.com>,
linux-nvdimm <linux-nvdimm@lists.01.org>,
Matthew Wilcox <willy@infradead.org>,
Jason Gunthorpe <jgg@ziepe.ca>, Jane Chu <jane.chu@oracle.com>,
Muchun Song <songmuchun@bytedance.com>,
Mike Kravetz <mike.kravetz@oracle.com>,
Andrew Morton <akpm@linux-foundation.org>,
Oscar Salvador <osalvador@suse.de>
Subject: Re: [PATCH v1 05/11] mm/sparse-vmemmap: add a pgmap argument to section activation
Date: Wed, 5 May 2021 15:34:54 -0700 [thread overview]
Message-ID: <CAPcyv4iOh5wS04F=hftcwN1e3DJTg-qUhw8KHR=+wncqJ2KZsg@mail.gmail.com> (raw)
In-Reply-To: <20210325230938.30752-6-joao.m.martins@oracle.com>
On Thu, Mar 25, 2021 at 4:10 PM Joao Martins <joao.m.martins@oracle.com> wrote:
>
> @altmap is stored in a dev_pagemap, but it will be repurposed for
> hotplug memory for storing the memmap in the hotplugged memory[*] and
> reusing the altmap infrastructure to that end. This is to say that
> altmap can't be replaced with a @pgmap as it is going to cover more than
> dev_pagemap backend altmaps.
I was going to say, just pass the pgmap and lookup the altmap from
pgmap, but Oscar added a use case for altmap independent of pgmap. So
you might refresh this commit message to clarify why passing pgmap by
itself is not sufficient.
Other than that, looks good.
next prev parent reply other threads:[~2021-05-05 22:34 UTC|newest]
Thread overview: 64+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-25 23:09 [PATCH v1 00/11] mm, sparse-vmemmap: Introduce compound pagemaps Joao Martins
2021-03-25 23:09 ` [PATCH v1 01/11] memory-failure: fetch compound_head after pgmap_pfn_valid() Joao Martins
2021-04-24 0:12 ` Dan Williams
2021-04-24 19:00 ` Joao Martins
2021-03-25 23:09 ` [PATCH v1 02/11] mm/page_alloc: split prep_compound_page into head and tail subparts Joao Martins
2021-04-24 0:16 ` Dan Williams
2021-04-24 19:05 ` Joao Martins
2021-03-25 23:09 ` [PATCH v1 03/11] mm/page_alloc: refactor memmap_init_zone_device() page init Joao Martins
2021-04-24 0:18 ` Dan Williams
2021-04-24 19:05 ` Joao Martins
2021-03-25 23:09 ` [PATCH v1 04/11] mm/memremap: add ZONE_DEVICE support for compound pages Joao Martins
2021-05-05 18:44 ` Dan Williams
2021-05-05 18:58 ` Matthew Wilcox
2021-05-05 19:49 ` Joao Martins
2021-05-05 22:20 ` Dan Williams
2021-05-05 22:36 ` Joao Martins
2021-05-05 23:03 ` Dan Williams
2021-05-06 10:12 ` Joao Martins
2021-05-18 17:27 ` Joao Martins
2021-05-18 19:56 ` Jane Chu
2021-05-19 11:29 ` Joao Martins
2021-05-19 18:36 ` Jane Chu
2021-06-07 20:17 ` Dan Williams
2021-06-07 20:47 ` Joao Martins
2021-06-07 21:00 ` Joao Martins
2021-06-07 21:57 ` Dan Williams
2021-05-06 8:05 ` Aneesh Kumar K.V
2021-05-06 10:23 ` Joao Martins
2021-05-06 11:43 ` Matthew Wilcox
2021-05-06 12:15 ` Joao Martins
2021-03-25 23:09 ` [PATCH v1 05/11] mm/sparse-vmemmap: add a pgmap argument to section activation Joao Martins
2021-05-05 22:34 ` Dan Williams [this message]
2021-05-05 22:37 ` Joao Martins
2021-05-05 23:14 ` Dan Williams
2021-05-06 10:24 ` Joao Martins
2021-03-25 23:09 ` [PATCH v1 06/11] mm/sparse-vmemmap: refactor vmemmap_populate_basepages() Joao Martins
2021-05-05 22:43 ` Dan Williams
2021-05-06 10:27 ` Joao Martins
2021-05-06 18:36 ` Joao Martins
2021-03-25 23:09 ` [PATCH v1 07/11] mm/sparse-vmemmap: populate compound pagemaps Joao Martins
2021-05-06 1:18 ` Dan Williams
2021-05-06 11:01 ` Joao Martins
2021-05-10 19:19 ` Dan Williams
2021-05-13 18:45 ` Joao Martins
2021-06-16 15:05 ` Joao Martins
2021-06-16 23:35 ` Dan Williams
2021-03-25 23:09 ` [PATCH v1 08/11] mm/sparse-vmemmap: use hugepages for PUD " Joao Martins
2021-06-01 19:30 ` Dan Williams
2021-06-07 12:02 ` Joao Martins
2021-06-07 19:47 ` Dan Williams
2021-03-25 23:09 ` [PATCH v1 09/11] mm/page_alloc: reuse tail struct pages for " Joao Martins
2021-06-01 23:35 ` Dan Williams
2021-06-07 13:48 ` Joao Martins
2021-06-07 19:32 ` Dan Williams
2021-06-14 18:41 ` Joao Martins
2021-06-14 23:07 ` Dan Williams
2021-03-25 23:09 ` [PATCH v1 10/11] device-dax: compound pagemap support Joao Martins
2021-06-02 0:36 ` Dan Williams
2021-06-07 13:59 ` Joao Martins
2021-03-25 23:09 ` [PATCH v1 11/11] mm/gup: grab head page refcount once for group of subpages Joao Martins
2021-06-02 1:05 ` Dan Williams
2021-06-07 15:21 ` Joao Martins
2021-06-07 19:22 ` Dan Williams
2021-04-01 9:38 ` [PATCH v1 00/11] mm, sparse-vmemmap: Introduce compound pagemaps Joao Martins
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