linux-kernel - Re: [PATCH 4/4] hugetlb: hugepagesnid=: add 1G huge page support

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Message-Id: <20140210153032.ac9325938264a3894dc83f8b@linux-foundation.org>
Date:	Mon, 10 Feb 2014 15:30:32 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Luiz Capitulino <lcapitulino@...hat.com>
Cc:	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	mtosatti@...hat.com, mgorman@...e.de, aarcange@...hat.com,
	andi@...stfloor.org, riel@...hat.com
Subject: Re: [PATCH 4/4] hugetlb: hugepagesnid=: add 1G huge page support

On Mon, 10 Feb 2014 12:27:48 -0500 Luiz Capitulino <lcapitulino@...hat.com> wrote:

> 
> ...
>
> --- a/mm/hugetlb.c
> +++ b/mm/hugetlb.c
> @@ -2051,6 +2051,29 @@ void __init hugetlb_add_hstate(unsigned order)
>  	parsed_hstate = h;
>  }
>  
> +static void __init hugetlb_hstate_alloc_pages_nid(struct hstate *h,
> +						int nid,
> +						unsigned long nr_pages)
> +{
> +	struct huge_bootmem_page *m;
> +	unsigned long i;
> +	void *addr;
> +
> +	for (i = 0; i < nr_pages; i++) {
> +		addr = memblock_virt_alloc_nid_nopanic(
> +				huge_page_size(h), huge_page_size(h),
> +				0, BOOTMEM_ALLOC_ACCESSIBLE, nid);
> +		if (!addr)
> +			break;
> +		m = addr;
> +		BUG_ON((unsigned long)virt_to_phys(m) & (huge_page_size(h) - 1));

IS_ALIGNED()?

> +		list_add(&m->list, &huge_boot_pages);
> +		m->hstate = h;
> +	}
> +
> +	h->max_huge_pages += i;
> +}
> +
>  void __init hugetlb_add_nrpages_nid(unsigned order, unsigned long nid,
>  				unsigned long nr_pages)
>  {

Please cc Yinghai Lu <yinghai@...nel.org> on these patches - he
understands memblock well and is a strong reviewer.

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