linux-kernel - Re: [PATCH 2/2] mm: swap: move anonymous THP split logic to vmscan

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Message-ID: <20170512164836.GC22367@cmpxchg.org>
Date:   Fri, 12 May 2017 12:48:36 -0400
From:   Johannes Weiner <hannes@...xchg.org>
To:     Minchan Kim <minchan@...nel.org>
Cc:     Huang Ying <ying.huang@...el.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH 2/2] mm: swap: move anonymous THP split logic to vmscan

On Fri, May 12, 2017 at 11:21:24AM +0900, Minchan Kim wrote:
> The add_to_swap aims to allocate swap_space(ie, swap slot and
> swapcache) so if it fails due to lack of space in case of THP
> or something(hdd swap but tries THP swapout) *caller* rather
> than add_to_swap itself should split the THP page and retry it
> with base page which is more natural.
> 
> Cc: Johannes Weiner <hannes@...xchg.org>
> Signed-off-by: Minchan Kim <minchan@...nel.org>

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