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Subject: Re: [PATCH 03/14] mm, compaction: Remove last_migrated_pfn from
 compact_control
To:     Mel Gorman <mgorman@techsingularity.net>,
        Linux-MM <linux-mm@kvack.org>
Cc:     David Rientjes <rientjes@google.com>,
        Andrea Arcangeli <aarcange@redhat.com>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Michal Hocko <mhocko@kernel.org>, ying.huang@intel.com,
        kirill@shutemov.name, Andrew Morton <akpm@linux-foundation.org>,
        Linux List Kernel Mailing <linux-kernel@vger.kernel.org>
References: <20181214230310.572-1-mgorman@techsingularity.net>
 <20181214230310.572-4-mgorman@techsingularity.net>
From:   Vlastimil Babka <vbabka@suse.cz>
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Date:   Mon, 17 Dec 2018 14:50:35 +0100
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On 12/15/18 12:02 AM, Mel Gorman wrote:
> The last_migrated_pfn field is a bit dubious as to whether it really helps
> but either way, the information from it can be inferred without increasing
> the size of compact_control so remove the field.

Yeah looks like this won't cause more frequent drains.

> Signed-off-by: Mel Gorman <mgorman@techsingularity.net>

Acked-by: Vlastimil Babka <vbabka@suse.cz>