linux-kernel - Re: [PATCH 03/14] mm, compaction: Remove last_migrated_pfn from compact

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Message-ID: <76f7182b-5521-2ee9-fa6f-4331e1eae313@suse.cz>
Date:   Mon, 17 Dec 2018 14:50:35 +0100
From:   Vlastimil Babka <vbabka@...e.cz>
To:     Mel Gorman <mgorman@...hsingularity.net>,
        Linux-MM <linux-mm@...ck.org>
Cc:     David Rientjes <rientjes@...gle.com>,
        Andrea Arcangeli <aarcange@...hat.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Michal Hocko <mhocko@...nel.org>, ying.huang@...el.com,
        kirill@...temov.name, Andrew Morton <akpm@...ux-foundation.org>,
        Linux List Kernel Mailing <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 03/14] mm, compaction: Remove last_migrated_pfn from
 compact_control

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@...hsingularity.net>

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