linux-kernel - Re: + mm-reclaim-madv_free-pages.patch added to -mm tree

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Date:   Tue, 7 Mar 2017 11:59:22 -0500
From:   Johannes Weiner <hannes@...xchg.org>
To:     Minchan Kim <minchan@...nel.org>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        linux-kernel@...r.kernel.org, shli@...com,
        hillf.zj@...baba-inc.com, hughd@...gle.com,
        mgorman@...hsingularity.net, mhocko@...e.com, riel@...hat.com,
        mm-commits@...r.kernel.org
Subject: Re: + mm-reclaim-madv_free-pages.patch added to -mm tree

On Tue, Mar 07, 2017 at 02:55:51PM +0900, Minchan Kim wrote:
> From d42d296950c3bbce74afddcff307fa18eef305fe Mon Sep 17 00:00:00 2001
> From: Minchan Kim <minchan@...nel.org>
> Date: Tue, 7 Mar 2017 14:48:37 +0900
> Subject: [PATCH] mm: fix lazyfree bug on check in try_to_unmap_one
> 
> If a page is swapbacked, it means it should be in swapcache
> in try_to_unmap_one's path.
> 
> If a page is !swapbacked, it mean it shouldn't be in swapcache
> in try_to_unmap_one's path.
> 
> Check both two cases all at once and if it fails, warn and
> return SWAP_FAIL. Such bug never mean we should shut down
> the kernel.
> 
> Suggested-by: Johannes Weiner <hannes@...xchg.org>
> Signed-off-by: Minchan Kim <minchan@...nel.org>

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

Thanks Minchan