Re: [PATCH v3 1/4] mm: rename memmap_init() and memmap_init_zone()

David Hildenbrand
2021-01-05T16:51:33Z

On 05.01.21 08:47, Baoquan He wrote:
> The current memmap_init_zone() only handles memory region inside one zone,
> actually memmap_init() does the memmap init of one zone. So rename both of
> them accordingly.
>
> And also rename the function parameter 'range_start_pfn' and local variable
> 'range_end_pfn' of memmap_init() to zone_start_pfn/zone_end_pfn.
>
> Signed-off-by: Baoquan He <bhe@redhat.com>
> Reviewed-by: Mike Rapoport <rppt@linux.ibm.com>
> ---
> arch/ia64/include/asm/pgtable.h | 2 +-
> arch/ia64/mm/init.c | 6 +++---
> include/linux/mm.h | 2 +-
> mm/memory_hotplug.c | 2 +-
> mm/page_alloc.c | 24 ++++++++++++------------
> 5 files changed, 18 insertions(+), 18 deletions(-)
>
> diff --git a/arch/ia64/include/asm/pgtable.h b/arch/ia64/include/asm/pgtable.h
> index 779b6972aa84..dce2ff37df65 100644
> --- a/arch/ia64/include/asm/pgtable.h
> +++ b/arch/ia64/include/asm/pgtable.h
> @@ -520,7 +520,7 @@ extern struct page *zero_page_memmap_ptr;
>
> # ifdef CONFIG_VIRTUAL_MEM_MAP
> /* arch mem_map init routine is needed due to holes in a virtual mem_map */
> - extern void memmap_init (unsigned long size, int nid, unsigned long zone,
> + extern void memmap_init_zone(unsigned long size, int nid, unsigned long zone,
> unsigned long start_pfn);
> # endif /* CONFIG_VIRTUAL_MEM_MAP */
> # endif /* !__ASSEMBLY__ */
> diff --git a/arch/ia64/mm/init.c b/arch/ia64/mm/init.c
> index e76386a3479e..c8e68e92beb3 100644
> --- a/arch/ia64/mm/init.c
> +++ b/arch/ia64/mm/init.c
> @@ -535,18 +535,18 @@ virtual_memmap_init(u64 start, u64 end, void *arg)
> / sizeof(struct page));
>
> if (map_start < map_end)
> - memmap_init_zone((unsigned long)(map_end - map_start),
> + memmap_init_range((unsigned long)(map_end - map_start),
> args->nid, args->zone, page_to_pfn(map_start), page_to_pfn(map_end),
> MEMINIT_EARLY, NULL, MIGRATE_MOVABLE);
> return 0;
> }
>
> void __meminit
> -memmap_init (unsigned long size, int nid, unsigned long zone,
> +memmap_init_zone(unsigned long size, int nid, unsigned long zone,
> unsigned long start_pfn)
> {
> if (!vmem_map) {
> - memmap_init_zone(size, nid, zone, start_pfn, start_pfn + size,
> + memmap_init_range(size, nid, zone, start_pfn, start_pfn + size,
> MEMINIT_EARLY, NULL, MIGRATE_MOVABLE);
> } else {
> struct page *start;
> diff --git a/include/linux/mm.h b/include/linux/mm.h
> index 6b3de3c09cd5..26c01f5a028b 100644
> --- a/include/linux/mm.h
> +++ b/include/linux/mm.h
> @@ -2439,7 +2439,7 @@ extern int __meminit early_pfn_to_nid(unsigned long pfn);
> #endif
>
> extern void set_dma_reserve(unsigned long new_dma_reserve);
> -extern void memmap_init_zone(unsigned long, int, unsigned long,
> +extern void memmap_init_range(unsigned long, int, unsigned long,
> unsigned long, unsigned long, enum meminit_context,
> struct vmem_altmap *, int migratetype);
> extern void setup_per_zone_wmarks(void);
> diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
> index f9d57b9be8c7..ddcb1cd24c60 100644
> --- a/mm/memory_hotplug.c
> +++ b/mm/memory_hotplug.c
> @@ -713,7 +713,7 @@ void __ref move_pfn_range_to_zone(struct zone *zone, unsigned long start_pfn,
> * expects the zone spans the pfn range. All the pages in the range
> * are reserved so nobody should be touching them so we should be safe
> */
> - memmap_init_zone(nr_pages, nid, zone_idx(zone), start_pfn, 0,
> + memmap_init_range(nr_pages, nid, zone_idx(zone), start_pfn, 0,
> MEMINIT_HOTPLUG, altmap, migratetype);
>
> set_zone_contiguous(zone);
> diff --git a/mm/page_alloc.c b/mm/page_alloc.c
> index 3ea9d5cd6058..69ebf75be91c 100644
> --- a/mm/page_alloc.c
> +++ b/mm/page_alloc.c
> @@ -6117,7 +6117,7 @@ overlap_memmap_init(unsigned long zone, unsigned long *pfn)
> * (usually MIGRATE_MOVABLE). Besides setting the migratetype, no related
> * zone stats (e.g., nr_isolate_pageblock) are touched.
> */
> -void __meminit memmap_init_zone(unsigned long size, int nid, unsigned long zone,
> +void __meminit memmap_init_range(unsigned long size, int nid, unsigned long zone,
> unsigned long start_pfn, unsigned long zone_end_pfn,
> enum meminit_context context,
> struct vmem_altmap *altmap, int migratetype)
> @@ -6292,24 +6292,24 @@ static inline u64 init_unavailable_range(unsigned long spfn, unsigned long epfn,
> }
> #endif
>
> -void __init __weak memmap_init(unsigned long size, int nid,
> +void __init __weak memmap_init_zone(unsigned long size, int nid,
> unsigned long zone,
> - unsigned long range_start_pfn)
> + unsigned long zone_start_pfn)
> {
> unsigned long start_pfn, end_pfn, hole_start_pfn = 0;
> - unsigned long range_end_pfn = range_start_pfn + size;
> + unsigned long zone_end_pfn = zone_start_pfn + size;
> u64 pgcnt = 0;
> int i;
>
> for_each_mem_pfn_range(i, nid, &start_pfn, &end_pfn, NULL) {
> - start_pfn = clamp(start_pfn, range_start_pfn, range_end_pfn);
> - end_pfn = clamp(end_pfn, range_start_pfn, range_end_pfn);
> - hole_start_pfn = clamp(hole_start_pfn, range_start_pfn,
> - range_end_pfn);
> + start_pfn = clamp(start_pfn, zone_start_pfn, zone_end_pfn);
> + end_pfn = clamp(end_pfn, zone_start_pfn, zone_end_pfn);
> + hole_start_pfn = clamp(hole_start_pfn, zone_start_pfn,
> + zone_end_pfn);
>
> if (end_pfn > start_pfn) {
> size = end_pfn - start_pfn;
> - memmap_init_zone(size, nid, zone, start_pfn, range_end_pfn,
> + memmap_init_range(size, nid, zone, start_pfn, zone_end_pfn,
> MEMINIT_EARLY, NULL, MIGRATE_MOVABLE);
> }
>
> @@ -6326,8 +6326,8 @@ void __init __weak memmap_init(unsigned long size, int nid,
> * considered initialized. Make sure that memmap has a well defined
> * state.
> */
> - if (hole_start_pfn < range_end_pfn)
> - pgcnt += init_unavailable_range(hole_start_pfn, range_end_pfn,
> + if (hole_start_pfn < zone_end_pfn)
> + pgcnt += init_unavailable_range(hole_start_pfn, zone_end_pfn,
> zone, nid);
>
> if (pgcnt)
> @@ -7039,7 +7039,7 @@ static void __init free_area_init_core(struct pglist_data *pgdat)
> set_pageblock_order();
> setup_usemap(pgdat, zone, zone_start_pfn, size);
> init_currently_empty_zone(zone, zone_start_pfn, size);
> - memmap_init(size, nid, j, zone_start_pfn);
> + memmap_init_zone(size, nid, j, zone_start_pfn);
> }
> }
>
>

I would have factored-out renaming the variables or squashed that part
into patch #2.

LGTM

Reviewed-by: David Hildenbrand <david@redhat.com>

--
Thanks,

David / dhildenb