linux-kernel - Re: [PATCH] mm/page_alloc: make percpu_pagelist_high

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Message-ID: <aTACKT0b1jFM-G20@gourry-fedora-PF4VCD3F>
Date: Wed, 3 Dec 2025 04:26:01 -0500
From: Gregory Price <gourry@...rry.net>
To: "David Hildenbrand (Red Hat)" <david@...nel.org>
Cc: Michal Hocko <mhocko@...e.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Aboorva Devarajan <aboorvad@...ux.ibm.com>, vbabka@...e.cz,
	surenb@...gle.com, jackmanb@...gle.com, hannes@...xchg.org,
	ziy@...dia.com, linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	Oscar Salvador <OSalvador@...e.com>,
	Juan Yescas <jyescas@...gle.com>
Subject: Re: [PATCH] mm/page_alloc: make percpu_pagelist_high_fraction reads
 lock-free

On Wed, Dec 03, 2025 at 04:23:20AM -0500, Gregory Price wrote:
> What luck, I do! :D
> And i just noticed it's the same page over and over
> 

Should have noted: 6.13.2

but it's kind of a frankenstein's 6.13.2 with stable backports, so I
don't know what's been fixed between 6.13 and latest.  If there are
relevant patches I can search for whether we have them.

> [ 3404.119270] migrating pfn c06f176 failed ret:1
> [ 3404.129152] page: refcount:4 mapcount:0 mapping:0000000061ca20ba index:0xad28e5b pfn:0xc06f176
> [ 3404.148284] memcg:ffff88842e855000
> [ 3404.155834] aops:btree_aops ino:1
> [ 3404.163193] flags: 0x17ffff066c00420c(referenced|uptodate|workingset|private|node=1|zone=3|lastcpupid=0x1ffff)
> [ 3404.185408] raw: 17ffff066c00420c ffffc90066a13ca0 ffffc90066a13ca0 ffff88812b8502f8
> [ 3404.202603] raw: 000000000ad28e5b ffff888859fd42d0 00000004ffffffff ffff88842e855000
> [ 3404.219779] page dumped because: migration failure
> 

~Gregory