Hi Stephen, The rte_eal_pci_probe is typically called at the startup.
Now let's say a DPDK application is running with a PCI device (doing tx and rx) and I remove that PCI device underneath (hot plugout) So how does the application now know that the device is gone ? Is it that rte_eal_pci_probe should be called periodically from, let's say, the slow control path of the DPDK application ? Regards -Prashant -----Original Message----- From: Stephen Hemminger [mailto:step...@networkplumber.org] Sent: Wednesday, November 27, 2013 10:16 AM To: Prashant Upadhyaya Cc: dev at dpdk.org Subject: Re: [dpdk-dev] Regarding VM live migration with SRIOV On Wed, 27 Nov 2013 10:09:09 +0530 Prashant Upadhyaya <prashant.upadhyaya at aricent.com> wrote: > Hi, > > Let me be more specific. > Does DPDK support hot plugin/plugout of PCI devices ? > What typically needs to be done if this is to be achieved inside an > application. > > Typically, the NIC PF or VF appears to the DPDK application as a PCI device > which is probed at startup. > Now what happens if I insert a new VF dynamically and want to use it > inside the DPDK application (while it is already running), how should > this typically be done ? [hotplugin] And what happens if the DPDK > application is in control of a PCI device and that PCI device is > suddenly removed ? How can the application detect this and stop doing > data transfer on this and sort of unload it ? [hotplugout] > > If the above can be coded inside the DPDK app, then we can think of live VM > migration with SRIOV -- just hotplugin and plugout the VF's. > > Regards > -Prashant > The current implementation does look like it supports hotplug. All devices are discovered during rte_eal_pci_probe. =============================================================================== Please refer to http://www.aricent.com/legal/email_disclaimer.html for important disclosures regarding this electronic communication. ===============================================================================
