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charset="iso-2022-jp" Content-ID: Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: nec.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: OSBPR01MB2229.jpnprd01.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 0ab03ced-6651-493e-cb8d-08d8ccd42c4b X-MS-Exchange-CrossTenant-originalarrivaltime: 09 Feb 2021 08:24:52.0603 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: e67df547-9d0d-4f4d-9161-51c6ed1f7d11 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: 3kUG/zCkuwotszdTMdxQt/RWnNyVc6jcbY3RhYa+F0EJBKtkJbmJXkgSzE+gCMFYPQnJ6c+CXMQX7JtTZB/3lQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: OS3PR01MB6134 Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org The devmap bulk queue is allocated with GFP_ATOMIC and the allocation may fail if there is no available space in existing percpu pool. Since commit 75ccae62cb8d42 ("xdp: Move devmap bulk queue into struct net_d= evice") moved the bulk queue allocation to NETDEV_REGISTER callback, whose context is allowed to sleep, use GFP_KERNEL instead of GFP_ATOMIC to let percpu allocator extend the pool when needed and avoid possible failure of netdev registration. As the required alignment is natural, we can simply use alloc_percpu(). Signed-off-by: Jun'ichi Nomura diff --git a/kernel/bpf/devmap.c b/kernel/bpf/devmap.c index f6e9c68afdd4..f4d3fe8e0652 100644 --- a/kernel/bpf/devmap.c +++ b/kernel/bpf/devmap.c @@ -803,8 +803,7 @@ static int dev_map_notification(struct notifier_block *= notifier, =20 /* will be freed in free_netdev() */ netdev->xdp_bulkq =3D - __alloc_percpu_gfp(sizeof(struct xdp_dev_bulk_queue), - sizeof(void *), GFP_ATOMIC); + alloc_percpu(struct xdp_dev_bulk_queue); if (!netdev->xdp_bulkq) return NOTIFY_BAD; =