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Howlett" To: Andrew Morton Cc: maple-tree@lists.infradead.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, David Hildenbrand , Lorenzo Stoakes , Vlastimil Babka , Suren Baghdasaryan , Michal Hocko , Jann Horn , Pedro Falcato , Charan Teja Kalla , shikemeng@huaweicloud.com, kasong@tencent.com, nphamcs@gmail.com, bhe@redhat.com, baohua@kernel.org, chrisl@kernel.org, Matthew Wilcox , "Liam R. Howlett" Subject: [PATCH v1 5/9] mm/vma: Add page table limit to unmap_region() Date: Tue, 9 Sep 2025 15:09:41 -0400 Message-ID: <20250909190945.1030905-6-Liam.Howlett@oracle.com> X-Mailer: git-send-email 2.47.2 In-Reply-To: <20250909190945.1030905-1-Liam.Howlett@oracle.com> References: <20250909190945.1030905-1-Liam.Howlett@oracle.com> Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: YQBPR01CA0014.CANPRD01.PROD.OUTLOOK.COM (2603:10b6:c01::22) To PH0PR10MB5777.namprd10.prod.outlook.com (2603:10b6:510:128::16) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: PH0PR10MB5777:EE_|DS0PR10MB7052:EE_ X-MS-Office365-Filtering-Correlation-Id: 8986633a-c48a-45d3-dda8-08ddefd479ed X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|376014|7416014|1800799024; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?q1mVFOSw18rdNhTqut0SlF44YB2TxZGF8DyGnnr/1tX8ycx8LF/U1F8E6iK3?= =?us-ascii?Q?ZJt+j00gCm62Q1zIjuEYud7AvvAVmpzK/uXuG6GowN6rSF71IA89v06h4NxE?= =?us-ascii?Q?uMuSx68rvQFBJCm1CGngYUFDTCPv1tR+7+fRmRFE3n4pN7DIX+SHudvvAdvv?= =?us-ascii?Q?Afwl9jkya0A6CCay6i+V3IUGdIh4sLynSnqBRKClWZXL+NjEQ2/o2EilTKil?= =?us-ascii?Q?0kCCOHUuYeJeHHNN552/Bd6GGTv7GluZR//Jg40eFE0grtPqZwOCKEWhAFWB?= =?us-ascii?Q?tI3DuEjBpaTuikJ2tQjp+CQeSqtDVPvp0RZ6gcCwIQ9Wl8QqxN4Uq4IIgR2o?= =?us-ascii?Q?4Dr4dmLRnU80aY2C1UP0Xiiv7XkAQhT7SY9yYFGJGZhYW5F+BrNOteq5UJom?= =?us-ascii?Q?q2jeM9l6rzqXPmgA4rzTWfRpQTa7PPSMfuakv4Jl/CMhGXqVHEVxVpH0vwTk?= =?us-ascii?Q?IQUY3bXg0OI1oNpZKcvtDjIB1W4GHhFkEYzRPVrWRX7qVGDI/fpNU/dUZa3J?= =?us-ascii?Q?EPdxeqtQcpqO6rowubVqwLhjGRQIB6IC34OOIu5SaUQY7NvXG02GQmgPTlmy?= =?us-ascii?Q?3LXGTa75RnPfp3yJvS8DqMIG/M5RmfdGXtDgTjoD9x+tZLczFCD8LpD+L4TT?= =?us-ascii?Q?q924I+kl881EaXYuQM9CAABvcv9K+lI/nOIY7cfPN3LVBtmsFm9uzJaNcQ9C?= =?us-ascii?Q?j0WAVxLL/IsPvdNKBPUdj5yqtfgEhQnD+j97zdx/wxu5GSJ6BMZYDIgXqFnS?= =?us-ascii?Q?2qzuYwbNdzsbYNxqeTsPtUdl7eQTdy6mRm3dfSfAHPaw1avut7D7AwH49+8T?= =?us-ascii?Q?gcF4OumAZP4FRujHqucf4E+qNAUstCx/L4jVMskz/9WhaUfL+LQITPlYMxgt?= =?us-ascii?Q?10GFgMPl0Kq4V7rHSvvg7/Iu82Ex6QiQwQYsk5ludyYpQmKmGRK9ZKHBPKFW?= =?us-ascii?Q?Yv+zM0mXy2OrjHtOkGDRsqWZOsb2d2Q4qtl+ikhh6fqrxpnUcTHqgPTfGtfs?= =?us-ascii?Q?98/nslCx4TFgW5QGwvjmk2N4dxpRCZG/xuSdBQZD8kXBjbnpjSxEzlu7g52a?= =?us-ascii?Q?7RkciEX9Y3M2M5W4L1KzhIfMqJzqZniXIKYpP0/1SRQXbMEqSM+GwaviHmIX?= =?us-ascii?Q?gxtVWroE50FnvVT9YVltV67EyQ9SsdFpwYBsTnTv9IR9DDaRf1yTxE6uh4hr?= =?us-ascii?Q?epNbwSg5RgiyO4ygJBO/7TIX0X0YcjAym/hfwDS06yfmYKXCRPpPwTzf6lrv?= =?us-ascii?Q?HzV1XBcaD+TJvtIE/r7/1+TBJTxzO3oS4v8F77P9xhVUplCh9FxVHxYwq9C0?= =?us-ascii?Q?A8ebsFyNMaFoURzN3xKhxR9UpqYs6KYkEwyyFh4GR7XtXpkUYDbmuLxHXs5V?= =?us-ascii?Q?fbcuoyJJ+3uQcysJTjFV8Np6cPs5at2j/m6aYXEVL7fPfSH/I/l5Mm0y4FVS?= =?us-ascii?Q?Yzc/nT5gO/k=3D?= X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:PH0PR10MB5777.namprd10.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(366016)(376014)(7416014)(1800799024);DIR:OUT;SFP:1101; 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charset="utf-8" The unmap_region() calls need to pass through the page table limit for a future patch. No functional changes intended. Reviewed-by: Lorenzo Stoakes Signed-off-by: Liam R. Howlett Reviewed-by: Pedro Falcato --- mm/vma.c | 5 +++-- mm/vma.h | 2 +- 2 files changed, 4 insertions(+), 3 deletions(-) diff --git a/mm/vma.c b/mm/vma.c index 1bae142bbc0f1..4c850ffd83a4b 100644 --- a/mm/vma.c +++ b/mm/vma.c @@ -474,7 +474,7 @@ void remove_vma(struct vm_area_struct *vma) * Called with the mm semaphore held. */ void unmap_region(struct ma_state *mas, struct vm_area_struct *vma, - unsigned long vma_min, unsigned long vma_max, + unsigned long vma_min, unsigned long vma_max, unsigned long pg_max, struct vm_area_struct *prev, struct vm_area_struct *next) { struct mm_struct *mm =3D vma->vm_mm; @@ -487,7 +487,7 @@ void unmap_region(struct ma_state *mas, struct vm_area_= struct *vma, mas_set(mas, vma->vm_end); free_pgtables(&tlb, mas, vma, prev ? prev->vm_end : FIRST_USER_ADDRESS, next ? next->vm_start : USER_PGTABLES_CEILING, - next ? next->vm_start : USER_PGTABLES_CEILING, + pg_max, /* mm_wr_locked =3D */ true); tlb_finish_mmu(&tlb); } @@ -2420,6 +2420,7 @@ static int __mmap_new_file_vma(struct mmap_state *map, vma_iter_set(vmi, vma->vm_end); /* Undo any partial mapping done by a device driver. */ unmap_region(&vmi->mas, vma, vma->vm_start, vma->vm_end, + map->next ? map->next->vm_start : USER_PGTABLES_CEILING, map->prev, map->next); =20 return error; diff --git a/mm/vma.h b/mm/vma.h index a9d0cef684ddb..b0ebc81d5862e 100644 --- a/mm/vma.h +++ b/mm/vma.h @@ -261,7 +261,7 @@ int do_vmi_munmap(struct vma_iterator *vmi, struct mm_s= truct *mm, void remove_vma(struct vm_area_struct *vma); =20 void unmap_region(struct ma_state *mas, struct vm_area_struct *vma, - unsigned long min, unsigned long max, + unsigned long min, unsigned long max, unsigned long pg_max, struct vm_area_struct *prev, struct vm_area_struct *next); =20 /* We are about to modify the VMA's flags. */ --=20 2.47.2