linux-kernel - Re: [PATCH for v5.8 3/3] mm/memory: fix IO cost for anonymous page

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Message-ID: <20200616145035.GC616830@cmpxchg.org>
Date:   Tue, 16 Jun 2020 10:50:35 -0400
From:   Johannes Weiner <hannes@...xchg.org>
To:     js1304@...il.com
Cc:     Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, Rik van Riel <riel@...riel.com>,
        Minchan Kim <minchan.kim@...il.com>,
        Michal Hocko <mhocko@...e.com>, kernel-team@....com,
        Joonsoo Kim <iamjoonsoo.kim@....com>
Subject: Re: [PATCH for v5.8 3/3] mm/memory: fix IO cost for anonymous page

On Tue, Jun 16, 2020 at 03:16:44PM +0900, js1304@...il.com wrote:
> From: Joonsoo Kim <iamjoonsoo.kim@....com>
> 
> With synchronous IO swap device, swap-in is directly handled in fault
> code. Since IO cost notation isn't added there, with synchronous IO swap
> device, LRU balancing could be wrongly biased. Fix it to count it
> in fault code.
> 
> Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@....com>

Acked-by: Johannes Weiner <hannes@...xchg.org>