linux-kernel - Re: [PATCH v3 2/3] mm: return zero_resv

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Date:   Wed, 10 Oct 2018 11:39:08 +0200
From:   Oscar Salvador <osalvador@...hadventures.net>
To:     Masayoshi Mizuma <msys.mizuma@...il.com>
Cc:     linux-mm@...ck.org, Naoya Horiguchi <n-horiguchi@...jp.nec.com>,
        Pavel Tatashin <pavel.tatashin@...rosoft.com>,
        Michal Hocko <mhocko@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org,
        x86@...nel.org
Subject: Re: [PATCH v3 2/3] mm: return zero_resv_unavail optimization

On Tue, Oct 02, 2018 at 10:38:20AM -0400, Masayoshi Mizuma wrote:
> From: Pavel Tatashin <pavel.tatashin@...rosoft.com>
> 
> When checking for valid pfns in zero_resv_unavail(), it is not necessary to
> verify that pfns within pageblock_nr_pages ranges are valid, only the first
> one needs to be checked. This is because memory for pages are allocated in
> contiguous chunks that contain pageblock_nr_pages struct pages.
> 
> Signed-off-by: Pavel Tatashin <pavel.tatashin@...rosoft.com>
> Reviewed-by: Masayoshi Mizuma <m.mizuma@...fujitsu.com>
> Acked-by: Naoya Horiguchi <n-horiguchi@...jp.nec.com>

Looks good to me 

Reviewed-by: Oscar Salvador <osalvador@...e.de>

Thanks
-- 
Oscar Salvador
SUSE L3