From nobody Sun Feb 8 17:43:13 2026 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (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 E2DA230E0F5 for ; Tue, 21 Oct 2025 10:06:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.133.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761041177; cv=none; b=A7fP26IQVDEp/Yrvo+rcCyBGuFM501dLtS/aU+t+i6RnI2B/7jZ1lNtuBa7kcdmDGzlrPc2Eb9bA8keG6zRvbmwhpB02N5xcx+Xr2jvouy4E8+OT6retOsYBIaTFQvfPC8oUPYHuOfb5N02OdkEZORhMV50gfkPicZE47EL42GQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761041177; c=relaxed/simple; bh=JHx3RzN7ekZXT5s/kmXgxoDVrb+4PO8Z4TdtKCJjRPY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=AZcpWCCabjjr3dwCFNfDm+lpHJzU25b9cBXryQzQc0PQwFMWxQ/DMdQjHnLbGLSkUf2lbePOzFeQzpJdHnmP6eRCiQi68I46lxUtPLiAidD2r9N0Zf08geXfDBCyozFEsOQXsATgNRwTO/Mn+yT5JQW8VbS+IeFB0qrmoEKnkqc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=GHD2EcBL; arc=none smtp.client-ip=170.10.133.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="GHD2EcBL" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1761041174; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=AcIk1u1LFpf3b4C6lDAgUzkv/HVOGHxfz0isd+tTMcE=; b=GHD2EcBL5DYwLQpWsIUoVtBijP/98cWjT+JfinI++4QZXaYjefJlrv/3rSwtiN6hFzbClB sC5FI4ytTH8WkIL2kAvQVyBIv7vrZIFXVtvE8R7nWayB2Aph7AWQnZbFsvfZfKwoGuw4I6 QA/90cD1Xq97q3z5XWFYpCvBE38uQuQ= Received: from mail-wm1-f69.google.com (mail-wm1-f69.google.com [209.85.128.69]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-678-v465gXGhNOq1d3oZtsfg_w-1; Tue, 21 Oct 2025 06:06:13 -0400 X-MC-Unique: v465gXGhNOq1d3oZtsfg_w-1 X-Mimecast-MFC-AGG-ID: v465gXGhNOq1d3oZtsfg_w_1761041172 Received: by mail-wm1-f69.google.com with SMTP id 5b1f17b1804b1-47111dc7c35so37341975e9.2 for ; Tue, 21 Oct 2025 03:06:13 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1761041172; x=1761645972; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=AcIk1u1LFpf3b4C6lDAgUzkv/HVOGHxfz0isd+tTMcE=; b=EvbxkuMWG61gG+mcr/S9be+sGfysxJJmtnd6Hvxxi1YLCzYGfPjO/vnrCIbI3EouI0 4VPTXUmv8xp+vmAKqfnnuLlCpgi8h3DmFldTrkifF/ehHNXxxY7u0FnoJDnar0yEnPmx djuiBV8oNC+pmroGtxghWcw84EvXkTisr7PmBe2PcJtUaM+QJkmvtDUr42OoUeVRg+X0 z+Z0isJPK6bLQFUiU6RL30pSfFnIf2dzkd7n2Gnfo/ACxjQOkdULNTQC/y+GXUycAx3S jUHMwdwi/u9RVlsmqFDASEDIlSYUNjCrIQhfzmFANlzhBQOP0kCnP17oBWKIFck+5PKH 5FoQ== X-Gm-Message-State: AOJu0YwhGukmXzxKKoCf8zlJrMm95ykBTdHOwlC9dflhl7Rn4l0O04qQ dw0kz8lrrWm3Ttlbb07UoKRaAq7nDdzwGAiBpZTiPkr0rrTWFxHabzUnI3pGLJz3Zs8fdMrWTj7 ybCt/tZH/rTfvUDvwDAzSLADlgUXgpZ4H8+DR0ztM+JJfcBFldmiUADx0xnsU15bgJPmpDixCpq 7LfrdDH8yYX88Iw2bVpq0ryjC4pKkEqveJLF67GVXsxhf9PA== X-Gm-Gg: ASbGncsHOx4aFSjAJdscWXx4uFZiN9j4GbB1NUS64GYABqDdHZJIAKZuNk4qwawKV9T wU/C7wdJfkpzmG1iphqBs9ljpLZonBFBPvsQXkZc0XAxZWpU0yZQTFjEda/Oqx4L+U/AWblbYkV NbltLVNHxogrRAvBk0xfMU+0s2g6mtYY0JN5jOefBmzfdhXJBj3M+tlFaQH83Wso1HJm55cu6VS /2gYAzQnznqLo7YQzpoIgWOPmnphruUQSTux4UKnBzzmBAIt3cNG/j2ei9BsvZa3tFQh/hhZETj lCZ2BuR9LDrkS5Bjo5J4SI/beFgaiMbgFJLSvgQntpbSrwBreic6wZVH+6DU2gDPu9EH4KKAHaF BpAsCvbFbbUxCjlKs9Hxm4vysgGA5oc6hjlPW/a6EOgCQoSr4CgWq1sASinkN X-Received: by 2002:a05:600c:8214:b0:46e:2d8a:d1a1 with SMTP id 5b1f17b1804b1-4711787c09fmr119128045e9.10.1761041172049; Tue, 21 Oct 2025 03:06:12 -0700 (PDT) X-Google-Smtp-Source: AGHT+IF73SD0i6hnV9Jjn1RH+PBFk3w9kuXlrYaFhYZPnbx3J0Nn0xcYgxIdbLFvh84woZnc9xYOlQ== X-Received: by 2002:a05:600c:8214:b0:46e:2d8a:d1a1 with SMTP id 5b1f17b1804b1-4711787c09fmr119127665e9.10.1761041171514; Tue, 21 Oct 2025 03:06:11 -0700 (PDT) Received: from localhost (p200300d82f4e3200c99da38b3f3ad4b3.dip0.t-ipconnect.de. [2003:d8:2f4e:3200:c99d:a38b:3f3a:d4b3]) by smtp.gmail.com with UTF8SMTPSA id 5b1f17b1804b1-47496c2c9dasm13567195e9.4.2025.10.21.03.06.10 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 21 Oct 2025 03:06:11 -0700 (PDT) From: David Hildenbrand To: linux-kernel@vger.kernel.org Cc: linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, David Hildenbrand , Andrew Morton , Madhavan Srinivasan , Michael Ellerman , Nicholas Piggin , Christophe Leroy , stable@vger.kernel.org Subject: [PATCH v1 2/2] powerpc/pseries/cmm: adjust BALLOON_MIGRATE when migrating pages Date: Tue, 21 Oct 2025 12:06:06 +0200 Message-ID: <20251021100606.148294-3-david@redhat.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20251021100606.148294-1-david@redhat.com> References: <20251021100606.148294-1-david@redhat.com> 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" Let's properly adjust BALLOON_MIGRATE like the other drivers. Note that the INFLATE/DEFLATE events are triggered from the core when enqueueing/dequeueing pages. Not completely sure whether really is stable material, but the fix is trivial so let's just CC stable. This was found by code inspection. Fixes: fe030c9b85e6 ("powerpc/pseries/cmm: Implement balloon compaction") Cc: Signed-off-by: David Hildenbrand Reviewed-by: Ritesh Harjani (IBM) --- arch/powerpc/platforms/pseries/cmm.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/powerpc/platforms/pseries/cmm.c b/arch/powerpc/platforms/= pseries/cmm.c index 688f5fa1c7245..310dab4bc8679 100644 --- a/arch/powerpc/platforms/pseries/cmm.c +++ b/arch/powerpc/platforms/pseries/cmm.c @@ -532,6 +532,7 @@ static int cmm_migratepage(struct balloon_dev_info *b_d= ev_info, =20 spin_lock_irqsave(&b_dev_info->pages_lock, flags); balloon_page_insert(b_dev_info, newpage); + __count_vm_event(BALLOON_MIGRATE); b_dev_info->isolated_pages--; spin_unlock_irqrestore(&b_dev_info->pages_lock, flags); =20 --=20 2.51.0