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charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: DM4PR11MB5994.namprd11.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 445c53f2-ffb5-4272-ac3a-08db55092bbb X-MS-Exchange-CrossTenant-originalarrivaltime: 15 May 2023 05:56:47.9333 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 46c98d88-e344-4ed4-8496-4ed7712e255d X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: z+LQafJBzIHcEpUVrevYN5KtqddGhpqggVYKUZAkmb7lAIIgXq+VrvSxdScb6OpRwdVcfBiF77SGEFtC5Kh3bg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: SA2PR11MB5113 X-OriginatorOrg: intel.com X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org > -----Original Message----- > From: Mingjin Ye > Sent: Saturday, May 6, 2023 6:03 PM > To: dev@dpdk.org > Cc: Yang, Qiming ; stable@dpdk.org; Zhou, YidingX > ; Ye, MingjinX ; Wu, > Wenjun1 > Subject: [PATCH v2] doc: add PMD known issue >=20 > Add a known issue: The ixgbe_vf driver is not multi-process safe. >=20 > Signed-off-by: Mingjin Ye > --- > v2: Modify issue description reason. > --- > doc/guides/nics/ixgbe.rst | 15 +++++++++++++++ > 1 file changed, 15 insertions(+) >=20 > diff --git a/doc/guides/nics/ixgbe.rst b/doc/guides/nics/ixgbe.rst index > b1d77ab7ab..9fb3c39bf4 100644 > --- a/doc/guides/nics/ixgbe.rst > +++ b/doc/guides/nics/ixgbe.rst > @@ -461,3 +461,18 @@ show bypass config > Show the bypass configuration for a bypass enabled NIC using the lowest > port on the NIC:: >=20 > testpmd> show bypass config (port_id) > + > +VF driver is not multi-process safe > +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > + > +Core dump may occur when we start secondary processes on the VF port. > +Mainstream Linux distributions have the ASLR feature enabled by > +default, and the text segment of the process memory space is randomized. > +The secondary process calls the function address shared by the primary > +process, resulting in a core dump. Which function did we encounter the issue with? Is this a bug in the PMD? I= n a multi-process scenario, we should not assume that the addresses of func= tions are identical across different processes. Additionally, this issue sh= ould not be related ASLR because the primary and secondary processes could = be two different applications but still share the same DPDK library. > + > + .. Note:: > + > + Support for ASLR features varies by distribution. Redhat and > + Centos series distributions work fine. Ubuntu distributions > + will core dump, other Linux distributions are unknown. > -- > 2.25.1