From: Oscar Salvador <osalvador@suse.de>
To: Dan Williams <dan.j.williams@intel.com>
Cc: akpm@linux-foundation.org, Michal Hocko <mhocko@suse.com>,
Vlastimil Babka <vbabka@suse.cz>,
Logan Gunthorpe <logang@deltatee.com>,
linux-nvdimm@lists.01.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v7 08/12] mm/sparsemem: Prepare for sub-section ranges
Date: Fri, 3 May 2019 13:00:19 +0200 [thread overview]
Message-ID: <20190503110019.GG15740@linux> (raw)
In-Reply-To: <155677656509.2336373.4432941742094481750.stgit@dwillia2-desk3.amr.corp.intel.com>
On Wed, May 01, 2019 at 10:56:05PM -0700, Dan Williams wrote:
> Prepare the memory hot-{add,remove} paths for handling sub-section
> ranges by plumbing the starting page frame and number of pages being
> handled through arch_{add,remove}_memory() to
> sparse_{add,remove}_one_section().
>
> This is simply plumbing, small cleanups, and some identifier renames. No
> intended functional changes.
>
> Cc: Michal Hocko <mhocko@suse.com>
> Cc: Vlastimil Babka <vbabka@suse.cz>
> Cc: Logan Gunthorpe <logang@deltatee.com>
> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
> ---
> include/linux/memory_hotplug.h | 7 +-
> mm/memory_hotplug.c | 118 +++++++++++++++++++++++++---------------
> mm/sparse.c | 7 +-
> 3 files changed, 83 insertions(+), 49 deletions(-)
>
> diff --git a/include/linux/memory_hotplug.h b/include/linux/memory_hotplug.h
> index ae892eef8b82..835a94650ee3 100644
> --- a/include/linux/memory_hotplug.h
> +++ b/include/linux/memory_hotplug.h
> @@ -354,9 +354,10 @@ extern int add_memory_resource(int nid, struct resource *resource);
> extern void move_pfn_range_to_zone(struct zone *zone, unsigned long start_pfn,
> unsigned long nr_pages, struct vmem_altmap *altmap);
> extern bool is_memblock_offlined(struct memory_block *mem);
> -extern int sparse_add_one_section(int nid, unsigned long start_pfn,
> - struct vmem_altmap *altmap);
> -extern void sparse_remove_one_section(struct zone *zone, struct mem_section *ms,
> +extern int sparse_add_section(int nid, unsigned long pfn,
> + unsigned long nr_pages, struct vmem_altmap *altmap);
> +extern void sparse_remove_section(struct zone *zone, struct mem_section *ms,
> + unsigned long pfn, unsigned long nr_pages,
> unsigned long map_offset, struct vmem_altmap *altmap);
> extern struct page *sparse_decode_mem_map(unsigned long coded_mem_map,
> unsigned long pnum);
> diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
> index 108380e20d8f..9f73332af910 100644
> --- a/mm/memory_hotplug.c
> +++ b/mm/memory_hotplug.c
> @@ -251,22 +251,44 @@ void __init register_page_bootmem_info_node(struct pglist_data *pgdat)
> }
> #endif /* CONFIG_HAVE_BOOTMEM_INFO_NODE */
>
> -static int __meminit __add_section(int nid, unsigned long phys_start_pfn,
> - struct vmem_altmap *altmap, bool want_memblock)
> +static int __meminit __add_section(int nid, unsigned long pfn,
> + unsigned long nr_pages, struct vmem_altmap *altmap,
> + bool want_memblock)
> {
> int ret;
>
> - if (pfn_valid(phys_start_pfn))
> + if (pfn_valid(pfn))
> return -EEXIST;
>
> - ret = sparse_add_one_section(nid, phys_start_pfn, altmap);
> + ret = sparse_add_section(nid, pfn, nr_pages, altmap);
> if (ret < 0)
> return ret;
>
> if (!want_memblock)
> return 0;
>
> - return hotplug_memory_register(nid, __pfn_to_section(phys_start_pfn));
> + return hotplug_memory_register(nid, __pfn_to_section(pfn));
> +}
> +
> +static int subsection_check(unsigned long pfn, unsigned long nr_pages,
> + unsigned long flags, const char *reason)
> +{
> + /*
> + * Only allow partial section hotplug for !memblock ranges,
> + * since register_new_memory() requires section alignment, and
What is register_new_memory?
Reviewed-by: Oscar Salvador <osalvador@suse.de>
--
Oscar Salvador
SUSE L3
next prev parent reply other threads:[~2019-05-03 11:00 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-02 5:55 [PATCH v7 00/12] mm: Sub-section memory hotplug support Dan Williams
2019-05-02 5:55 ` [PATCH v7 01/12] mm/sparsemem: Introduce struct mem_section_usage Dan Williams
2019-05-03 7:35 ` Oscar Salvador
2019-05-02 5:55 ` [PATCH v7 02/12] mm/sparsemem: Introduce common definitions for the size and mask of a section Dan Williams
2019-05-03 8:06 ` Oscar Salvador
2019-05-02 5:55 ` [PATCH v7 03/12] mm/sparsemem: Add helpers track active portions of a section at boot Dan Williams
2019-05-02 7:48 ` Oscar Salvador
2019-05-02 14:03 ` Dan Williams
2019-05-03 7:31 ` Oscar Salvador
2019-05-03 19:52 ` Pavel Tatashin
2019-05-02 5:55 ` [PATCH v7 04/12] mm/hotplug: Prepare shrink_{zone, pgdat}_span for sub-section removal Dan Williams
2019-05-02 5:55 ` [PATCH v7 05/12] mm/sparsemem: Convert kmalloc_section_memmap() to populate_section_memmap() Dan Williams
2019-05-03 8:46 ` Oscar Salvador
2019-05-02 5:55 ` [PATCH v7 06/12] mm/hotplug: Kill is_dev_zone() usage in __remove_pages() Dan Williams
2019-05-02 11:27 ` David Hildenbrand
2019-05-03 7:37 ` Oscar Salvador
2019-05-02 5:55 ` [PATCH v7 07/12] mm: Kill is_dev_zone() helper Dan Williams
2019-05-02 5:56 ` [PATCH v7 08/12] mm/sparsemem: Prepare for sub-section ranges Dan Williams
2019-05-03 11:00 ` Oscar Salvador [this message]
2019-05-02 5:56 ` [PATCH v7 09/12] mm/sparsemem: Support sub-section hotplug Dan Williams
2019-05-03 12:56 ` Oscar Salvador
2019-06-04 4:17 ` Dan Williams
2019-05-02 5:56 ` [PATCH v7 10/12] mm/devm_memremap_pages: Enable sub-section remap Dan Williams
2019-05-02 5:56 ` [PATCH v7 11/12] libnvdimm/pfn: Fix fsdax-mode namespace info-block zero-fields Dan Williams
2019-05-02 5:56 ` [PATCH v7 12/12] libnvdimm/pfn: Stop padding pmem namespaces to section alignment Dan Williams
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