From: Kiryl Shutsemau <kas@kernel.org>
To: "Vlastimil Babka (SUSE)" <vbabka@kernel.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>,
Andrew Morton <akpm@linux-foundation.org>,
David Hildenbrand <david@kernel.org>,
Harry Yoo <harry@kernel.org>, Usama Arif <usama.arif@linux.dev>,
Suren Baghdasaryan <surenb@google.com>,
Michal Hocko <mhocko@suse.com>,
Brendan Jackman <brendan.jackman@linux.dev>,
Zi Yan <ziy@nvidia.com>, Shakeel Butt <shakeel.butt@linux.dev>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
stable@vger.kernel.org, kernel-team@meta.com
Subject: Re: [PATCH v3] mm: page_alloc: make defrag_mode retries follow the promoted order
Date: Thu, 15 Oct 2026 15:39:43 +0100 [thread overview]
Message-ID: <atDlYr_RM4WRlMqG@thinkstation> (raw)
In-Reply-To: <a809956b-9775-4667-be60-f635b9a72ee6@kernel.org>
On Thu, Oct 15, 2026 at 03:53:30PM +0200, Vlastimil Babka (SUSE) wrote:
> On 10/15/26 14:55, Kiryl Shutsemau wrote:
> > On Thu, Oct 15, 2026 at 09:16:36AM +0200, Vlastimil Babka (SUSE) wrote:
> >> > And agree 7.4-rc1 with CC stable is fine. Sadly, not sure if anyone
> >> > but Meta is using the feature right now.
> >>
> >> I thought it was there for a long time but it was only added in 2025 :) At
> >> least the enterprise world is slow to adopt things, AFAICS.
> >
> > I was thinking to propose a patch after merge window to make defrag_mode
> > default. Do you think it is too early? I don't think it is ever going
> > to be truly stabilized without wider exposure.
>
> We can try it, but preferably with arguments (and best, numbers).
Will do.
> > We also discussed with Johannes to make a stricter (defrag_mode=2?) mode
> > that will not give up on fragmentation ever, but OOM instead.
>
> Would you use that mode at Meta? That however most likely wouldn't be
> general purpose enough to become default.
Yes, we consider it to be preferable to fragmentation. But it requires
experimentation.
--
Kiryl Shutsemau / Kirill A. Shutemov
next prev parent reply other threads:[~2026-10-15 14:39 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-09 12:55 [PATCH v3] mm: page_alloc: make defrag_mode retries follow the promoted order Kiryl Shutsemau (Meta)
2026-10-09 14:05 ` Usama Arif
2026-10-10 22:49 ` Andrew Morton
2026-10-12 10:17 ` Kiryl Shutsemau
2026-10-12 11:40 ` Vlastimil Babka (SUSE)
2026-10-13 2:28 ` Andrew Morton
2026-10-13 17:37 ` Kiryl Shutsemau
2026-10-13 18:15 ` Vlastimil Babka (SUSE)
2026-10-14 20:29 ` Johannes Weiner
2026-10-15 7:16 ` Vlastimil Babka (SUSE)
2026-10-15 12:55 ` Kiryl Shutsemau
2026-10-15 13:53 ` Vlastimil Babka (SUSE)
2026-10-15 14:39 ` Kiryl Shutsemau [this message]
2026-10-15 12:50 ` Kiryl Shutsemau
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