LKML Archive on
 help / Atom feed
From: Vlastimil Babka <>
To: Andrew Morton <>
	Mel Gorman <>,
	Michal Hocko <>,
	David Rientjes <>,
	Joonsoo Kim <>,
Subject: Re: [PATCH] mm, page_alloc: do not break __GFP_THISNODE by zonelist reset
Date: Fri, 25 May 2018 22:48:16 +0200
Message-ID: <> (raw)
In-Reply-To: <>

On 05/25/2018 09:43 PM, Andrew Morton wrote:
> On Fri, 25 May 2018 15:08:53 +0200 Vlastimil Babka <> wrote:
>> we might consider this for 4.17 although I don't know if there's anything
>> currently broken. Stable backports should be more important, but will have to
>> be reviewed carefully, as the code went through many changes.
>> BTW I think that also the ac->preferred_zoneref reset is currently useless if
>> we don't also reset ac->nodemask from a mempolicy to NULL first (which we
>> probably should for the OOM victims etc?), but I would leave that for a
>> separate patch.
> Confused.  If nothing is currently broken then why is a backport
> needed?  Presumably because we expect breakage in the future?  Can you
> expand on this?

I mean that SLAB is currently not affected, but in older kernels than
4.7 that don't yet have 511e3a058812 ("mm/slab: make cache_grow() handle
the page allocated on arbitrary node") it is. That's at least 4.4 LTS.
Older ones I'll have to check.

  reply index

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-25 13:08 Vlastimil Babka
2018-05-25 19:43 ` Andrew Morton
2018-05-25 20:48   ` Vlastimil Babka [this message]
2018-05-28  9:55     ` Vlastimil Babka
2018-05-28  7:21   ` Michal Hocko
2018-05-28 10:00     ` Vlastimil Babka
2018-05-28  8:49 ` Mel Gorman

Reply instructions:

You may reply publically to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \ \ \ \ \ \ \ \ \ \ \

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

LKML Archive on

Archives are clonable:
	git clone --mirror lkml/git/0.git
	git clone --mirror lkml/git/1.git
	git clone --mirror lkml/git/2.git
	git clone --mirror lkml/git/3.git
	git clone --mirror lkml/git/4.git
	git clone --mirror lkml/git/5.git
	git clone --mirror lkml/git/6.git
	git clone --mirror lkml/git/7.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 lkml lkml/ \
	public-inbox-index lkml

Newsgroup available over NNTP:

AGPL code for this site: git clone public-inbox