Re: [PATCH v3 0/3] page_owner: Fix refcount imbalance

From: Alexandre Ghiti <alex@ghiti.fr>
To: Oscar Salvador <osalvador@suse.de>,
	Andrew Morton <akpm@linux-foundation.org>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
	Michal Hocko <mhocko@suse.com>, Vlastimil Babka <vbabka@suse.cz>,
	Marco Elver <elver@google.com>,
	Andrey Konovalov <andreyknvl@gmail.com>,
	Alexander Potapenko <glider@google.com>
Subject: Re: [PATCH v3 0/3] page_owner: Fix refcount imbalance
Date: Fri, 29 Mar 2024 07:39:33 +0100	[thread overview]
Message-ID: <e0110a0a-9bde-4e83-8e2a-2631e1bad0cf@ghiti.fr> (raw)
In-Reply-To: <20240326063036.6242-1-osalvador@suse.de>

Hi Oscar,

On 26/03/2024 07:30, Oscar Salvador wrote:
> This series consists of a refactoring/correctness of updating the metadata
> of tail pages and a couple of fixups for the refcounting part.
>
>  From this series on, instead of counting the stacks, we count the outstanding
> nr_base_pages each stack has, which gives us a much better memory overview.
> The other fixup is for the migration part.
>
> A more detailed explanation can be found in the changelog of the respective
> patches.
>
> Oscar Salvador (3):
>    mm,page_owner: Update metada for tail pages
>    mm,page_owner: Fix refcount imbalance
>    mm,page_owner: Fix accounting of pages when migrating
>
>   Documentation/mm/page_owner.rst |  73 +++++++------
>   mm/page_owner.c                 | 184 +++++++++++++++++++-------------
>   2 files changed, 146 insertions(+), 111 deletions(-)
>

This fixes the following report from syzbot: 
https://lore.kernel.org/linux-riscv/00000000000070a2660614b83885@google.com/T/#t

So you can add:

Tested-by: Alexandre Ghiti <alexghiti@rivosinc.com>

Thanks,

Alex