All of lore.kernel.org
 help / color / mirror / Atom feed
From: Andrew Morton <akpm@linux-foundation.org>
To: Mel Gorman <mgorman@techsingularity.net>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>,
	linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2/2] mm/page_alloc: fix never set ALLOC_NOFRAGMENT flag
Date: Thu, 25 Apr 2019 14:09:08 -0700	[thread overview]
Message-ID: <20190425140908.7da3c4e52663196c7b914b00@linux-foundation.org> (raw)
In-Reply-To: <20190424234052.GW18914@techsingularity.net>

On Thu, 25 Apr 2019 00:40:53 +0100 Mel Gorman <mgorman@techsingularity.net> wrote:

> On Wed, Apr 24, 2019 at 03:46:24PM -0700, Andrew Morton wrote:
> > On Wed, 24 Apr 2019 10:04:03 +0100 Mel Gorman <mgorman@techsingularity.net> wrote:
> > 
> > > On Tue, Apr 23, 2019 at 12:01:43PM -0700, Andrew Morton wrote:
> > > > On Tue, 23 Apr 2019 15:08:06 +0300 Andrey Ryabinin <aryabinin@virtuozzo.com> wrote:
> > > > 
> > > > > Commit 0a79cdad5eb2 ("mm: use alloc_flags to record if kswapd can wake")
> > > > > removed setting of the ALLOC_NOFRAGMENT flag. Bring it back.
> > > > 
> > > > What are the runtime effects of this fix?
> > > 
> > > The runtime effect is that ALLOC_NOFRAGMENT behaviour is restored so
> > > that allocations are spread across local zones to avoid fragmentation
> > > due to mixing pageblocks as long as possible.
> > 
> > OK, thanks.  Is this worth a -stable backport?
> 
> Yes, but only for 5.0 obviously and both should be included if that is
> the case. I did not push for it initially as problems in this area are
> hard for a general user to detect and people have not complained about
> 5.0's fragmentation handling.

Ah, OK.  0a79cdad5eb2 didn't have a -stable tag so I suppose we can
leave this patch un-stabled.

If they went and backported 0a79cdad5eb2 anyway, let's hope the scripts
are smart enough to catch this patch's Fixes: link.


  reply	other threads:[~2019-04-25 21:09 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-04-23 12:08 [PATCH 1/2] mm/page_alloc: avoid potential NULL pointer dereference Andrey Ryabinin
2019-04-23 12:08 ` [PATCH 2/2] mm/page_alloc: fix never set ALLOC_NOFRAGMENT flag Andrey Ryabinin
2019-04-23 14:35   ` Mel Gorman
2019-04-23 19:01   ` Andrew Morton
2019-04-24  9:04     ` Mel Gorman
2019-04-24 22:46       ` Andrew Morton
2019-04-24 23:40         ` Mel Gorman
2019-04-25 21:09           ` Andrew Morton [this message]
2019-04-23 14:35 ` [PATCH 1/2] mm/page_alloc: avoid potential NULL pointer dereference Mel Gorman

Reply instructions:

You may reply publicly 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:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

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

  git send-email \
    --in-reply-to=20190425140908.7da3c4e52663196c7b914b00@linux-foundation.org \
    --to=akpm@linux-foundation.org \
    --cc=aryabinin@virtuozzo.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-mm@kvack.org \
    --cc=mgorman@techsingularity.net \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.