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Thu, 22 Aug 2019 09:50:50 +0000 From: Jan Dakinevich To: "linux-kernel@vger.kernel.org" CC: Denis Lunev , Konstantin Khorenko Subject: [PATCH 0/3] rework netlink skb allocation Thread-Topic: [PATCH 0/3] rework netlink skb allocation Thread-Index: AQHVWM8Uc7CX8GVwdk2oKW/7+DjmdQ== Date: Thu, 22 Aug 2019 09:50:50 +0000 Message-ID: <1566467448-9550-1-git-send-email-jan.dakinevich@virtuozzo.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: HE1PR09CA0088.eurprd09.prod.outlook.com (2603:10a6:7:3d::32) To VI1PR08MB2782.eurprd08.prod.outlook.com (2603:10a6:802:19::15) authentication-results: spf=none (sender IP is ) smtp.mailfrom=jan.dakinevich@virtuozzo.com; x-ms-exchange-messagesentrepresentingtype: 1 x-mailer: git-send-email 2.1.4 x-originating-ip: [185.231.240.5] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 1b99930d-3613-4ea5-5947-08d726e636df x-microsoft-antispam: BCL:0;PCL:0;RULEID:(2390118)(7020095)(4652040)(8989299)(5600166)(711020)(4605104)(1401327)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(2017052603328)(7193020);SRVR:VI1PR08MB5343; 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charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: virtuozzo.com X-MS-Exchange-CrossTenant-Network-Message-Id: 1b99930d-3613-4ea5-5947-08d726e636df X-MS-Exchange-CrossTenant-originalarrivaltime: 22 Aug 2019 09:50:50.3084 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 0bc7f26d-0264-416e-a6fc-8352af79c58f X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: VY2926KwlZhXsg4DO1Xk+KGh0uFRV5g2whVd3WC9YbVN+1EiQm2uKvNaiMYchpwJsrL4rSHMs6JZxHr1dl3zo9/VdtmttuWtJpZgevu6F0A= X-MS-Exchange-Transport-CrossTenantHeadersStamped: VI1PR08MB5343 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Currently, userspace is able to initiate costly high-order allocation in=20 kernel sending large broadcast netlink message, which is considered=20 undesirable. At the same time, unicast message are safe in this regard,=20 because they uses vmalloc-ed memory. This series introduces changes, that allow broadcast messages to be=20 allocated with vmalloc() as well as unicast. Jan Dakinevich (3): skbuff: use kvfree() to deallocate head netlink: always use vmapped memory for skb data netlink: use generic skb_set_owner_r() include/linux/netlink.h | 16 ---------------- net/core/skbuff.c | 2 +- net/ipv4/fib_frontend.c | 2 +- net/netfilter/nfnetlink.c | 2 +- net/netlink/af_netlink.c | 39 +++++++-------------------------------- 5 files changed, 10 insertions(+), 51 deletions(-) --=20 2.1.4