From nobody Sun Feb 8 01:30:58 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8C0EE1B81D3; Mon, 19 Jan 2026 23:01:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768863709; cv=none; b=gyqZtvvDWVbPkTM60VMG5LNRgsGPs5LZvpkSPbArC8L9fxTUixj6hNfo7gMMM8Z7An4VwSf0Lkm10eJqh53kyOuQgMsfbgCjaHBMX3KzeJKBTKtRDzF5Un1ExJ1iUxcsTfZUln/fef40bBZWuDFiQg0t+R1R4Z3vGzHCV8C3bA8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768863709; c=relaxed/simple; bh=luihl3MbyU6omYSiSWj4BOo3mmNqgAivFPTCpm64S5A=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Q20iWzPgigxAbnQUfhymW4eY+7AM8nmvYTYPRyo3w+cnvUJMHMIkyI/qGOUtmyroKAA4lXc2y8Fr6zBkOlGh2hmnbJuewckaUuz6Kb+qZcqiEPf9zAKsRKBej1mZ08GCV8quY3bCIaAjtMM5uO/64ySQzeYFvQNzO0HPti8q4Ak= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Ty14IhFY; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Ty14IhFY" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 531E9C19423; Mon, 19 Jan 2026 23:01:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1768863709; bh=luihl3MbyU6omYSiSWj4BOo3mmNqgAivFPTCpm64S5A=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Ty14IhFYRg1l/2Ez+3EIhcGA92inZASN9By1yGWpfoCYQQoaXhF9GeSHpXh/4o7wh rv2jd1KqUv7sxbQENf3+a93+kiHs6Pt5G9xfUtig2LlyAvg5fqgjrRlYOU451DxdQV xFS/6MQL9QO4d/tcIUcQUVkk5Ga5MkYY1UtDOLULiGw7WY4N60Pad45nIyjD3Ohaa7 1u8b3HPjwXFqvexE1sUgx5Pa9UxBfNk4UNre7uxGAjjqz0uqzNWWM+n6+PIJW/KZC+ PdVBqArgnZb/xbX+khcmpQlrZp1iBBmSTeD10FX6KYq5s943DkILJgOIVYjGLYJiq6 qwGIPnllyT+GA== From: "David Hildenbrand (Red Hat)" To: linux-kernel@vger.kernel.org Cc: linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, Broadcom internal kernel review list , linux-doc@vger.kernel.org, virtualization@lists.linux.dev, "David Hildenbrand (Red Hat)" , Andrew Morton , Oscar Salvador , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Jonathan Corbet , Madhavan Srinivasan , Michael Ellerman , Nicholas Piggin , Christophe Leroy , Arnd Bergmann , Greg Kroah-Hartman , Jerrin Shaji George , "Michael S. Tsirkin" , Jason Wang , Xuan Zhuo , =?UTF-8?q?Eugenio=20P=C3=A9rez?= , Zi Yan , SeongJae Park Subject: [PATCH v3 01/24] vmw_balloon: adjust BALLOON_DEFLATE when deflating while migrating Date: Tue, 20 Jan 2026 00:01:09 +0100 Message-ID: <20260119230133.3551867-2-david@kernel.org> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260119230133.3551867-1-david@kernel.org> References: <20260119230133.3551867-1-david@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" When we're effectively deflating the balloon while migrating a page because inflating the new page failed, we're not adjusting BALLOON_DEFLATE. Let's do that. This is a preparation for factoring out this handling to the core code, making it work in a similar way first. As this (deflating while migrating because of inflation error) is a corner case that I don't really expect to happen in practice and the stats are not that crucial, this likely doesn't classify as a fix. Reviewed-by: SeongJae Park Reviewed-by: Lorenzo Stoakes Acked-by: Michael S. Tsirkin Signed-off-by: David Hildenbrand (Red Hat) --- drivers/misc/vmw_balloon.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/misc/vmw_balloon.c b/drivers/misc/vmw_balloon.c index cc1d18b3df5ca..2cc34c4968fac 100644 --- a/drivers/misc/vmw_balloon.c +++ b/drivers/misc/vmw_balloon.c @@ -1818,6 +1818,8 @@ static int vmballoon_migratepage(struct balloon_dev_i= nfo *b_dev_info, if (status =3D=3D VMW_BALLOON_SUCCESS) { balloon_page_insert(&b->b_dev_info, newpage); __count_vm_event(BALLOON_MIGRATE); + } else { + __count_vm_event(BALLOON_DEFLATE); } =20 /* --=20 2.52.0