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Date: Tue, 15 Oct 2019 13:47:23 +0200
From: Michal Hocko <mhocko@kernel.org>
To: David Hildenbrand <david@redhat.com>
Subject: Re: [PATCH V6 1/2] mm/page_alloc: Make alloc_gigantic_page()
 available for general use
Message-ID: <20191015114723.GD317@dhcp22.suse.cz>
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Cc: Mark Rutland <mark.rutland@arm.com>, linux-ia64@vger.kernel.org,
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On Tue 15-10-19 13:42:03, David Hildenbrand wrote:
[...]
> > -static bool pfn_range_valid_gigantic(struct zone *z,
> > -			unsigned long start_pfn, unsigned long nr_pages)
> > -{
> > -	unsigned long i, end_pfn = start_pfn + nr_pages;
> > -	struct page *page;
> > -
> > -	for (i = start_pfn; i < end_pfn; i++) {
> > -		if (!pfn_valid(i))
> > -			return false;
> > -
> > -		page = pfn_to_page(i);
> 
> Am I missing something or should here really be a pfn_to_online_page() here
> instead of a pfn_valid() ?

http://lkml.kernel.org/r/20180423000943.GO17484@dhcp22.suse.cz

-- 
Michal Hocko
SUSE Labs