linux-kernel - Re: [PATCH v3 1/5] hugetlb: use page.private for hugetlb specific page flags

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Message-ID: <20210127102645.GH827@dhcp22.suse.cz>
Date:   Wed, 27 Jan 2021 11:26:45 +0100
From:   Michal Hocko <mhocko@...e.com>
To:     Mike Kravetz <mike.kravetz@...cle.com>
Cc:     linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        Naoya Horiguchi <n-horiguchi@...jp.nec.com>,
        Muchun Song <songmuchun@...edance.com>,
        David Hildenbrand <david@...hat.com>,
        Oscar Salvador <osalvador@...e.de>,
        Matthew Wilcox <willy@...radead.org>,
        Miaohe Lin <linmiaohe@...wei.com>,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH v3 1/5] hugetlb: use page.private for hugetlb specific
 page flags

Sorry forgot one thing.

On Fri 22-01-21 11:52:27, Mike Kravetz wrote:
> + * HPG_restore_reserve - Set when a hugetlb page consumes a reservation at
> + *	allocation time.  Cleared when page is fully instantiated.  Free
> + *	routine checks flag to restore a reservation on error paths.

Can we document that the pool is stored in head+1->private here please?

> + */
> +enum hugetlb_page_flags {
> +	HPG_restore_reserve = 0,
> +	__NR_HPAGEFLAGS,
> +};

-- 
Michal Hocko
SUSE Labs