Messages in this thread | | | Date | Mon, 29 Jun 2020 23:24:29 +0300 | From | Mike Rapoport <> | Subject | Re: [PATCH] mm: remove the redundancy code |
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On Mon, Jun 29, 2020 at 11:50:15AM -0700, David Rientjes wrote: > On Tue, 30 Jun 2020, Su Hui wrote: > > > remove the redundancy code, the zone_start_pfn > > is assigned from zone->zone_start_pfn > > Signed-off-by: Su Hui <sh_def@163.com> > > I don't think this is redundant, it's used by memory hotplug when onlining > new memory.
Right, it is:
$ git grep -wn init_currently_empty_zone mm/memory_hotplug.c mm/memory_hotplug.c:697: init_currently_empty_zone(zone, start_pfn, nr_pages);
> > --- > > mm/page_alloc.c | 2 -- > > 1 file changed, 2 deletions(-) > > > > diff --git a/mm/page_alloc.c b/mm/page_alloc.c > > index 3c4eb750a199..3372a8c9fbc4 100644 > > --- a/mm/page_alloc.c > > +++ b/mm/page_alloc.c > > @@ -6215,8 +6215,6 @@ void __meminit init_currently_empty_zone(struct zone *zone, > > if (zone_idx > pgdat->nr_zones) > > pgdat->nr_zones = zone_idx; > > > > - zone->zone_start_pfn = zone_start_pfn; > > - > > mminit_dprintk(MMINIT_TRACE, "memmap_init", > > "Initialising map node %d zone %lu pfns %lu -> %lu\n", > > pgdat->node_id, >
-- Sincerely yours, Mike.
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