linux-kernel - Re: [PATCH v2] mm, page_alloc: Fix has_unmovable

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Date:   Mon, 17 Dec 2018 15:07:26 -0800
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Oscar Salvador <osalvador@...e.de>
Cc:     mhocko@...e.com, vbabka@...e.cz, pavel.tatashin@...rosoft.com,
        rppt@...ux.vnet.ibm.com, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] mm, page_alloc: Fix has_unmovable_pages for
 HugePages

On Mon, 17 Dec 2018 23:51:13 +0100 Oscar Salvador <osalvador@...e.de> wrote:

> v1 -> v2:
> 	- Fix the logic for skipping pages by Michal
> 
> ---

Please be careful with the "^---$".  It signifies end-of-changelog, so
I ended up without a changelog!

> >From e346b151037d3c37feb10a981a4d2a25018acf81 Mon Sep 17 00:00:00 2001
> From: Oscar Salvador <osalvador@...e.de>
> Date: Mon, 17 Dec 2018 14:53:35 +0100
> Subject: [PATCH] mm, page_alloc: Fix has_unmovable_pages for HugePages
> 
> While playing with gigantic hugepages and memory_hotplug, I triggered
> the following #PF when "cat memoryX/removable":
> 
> ...
>
> Also, since gigantic pages span several pageblocks, re-adjust the logic
> for skipping pages.
> 
> Signed-off-by: Oscar Salvador <osalvador@...e.de>

cc:stable?