On 06/21/2011 01:52 PM, Bill Nottingham wrote: > Don Dutile (ddutile@xxxxxxxxxx) said: >> On 06/20/2011 05:09 PM, Bill Nottingham wrote: >>> I'm considering drop the network hotplug support from the 'network' >>> service. This is the code that would automatically run ifup when a new >>> network device appeared, if there was a configuration for it. >>> >>> The supported solution would be to use NetworkManager for these usage >>> cases (or wicd, or netplugd, or conman...) Alternatively, just run >>> ifup yourself. >>> >>> Currently, this would happen in the following cases: >>> 1. USB and/or expresscard hotplugged ethernet/wireless >>> 2. PCI hotswap of a network card >>> 3. Runtime addition of network interfaces in virtual system >>> 4. Admin manually removes and reloads a driver module >>> >>> For #1, those systems are generally better served by NM. >>> For #2, this is something with such heavy admin interaction that I >>> would suspect that it would be preferred to handle it manually. (Also, >>> swapping hardware likely invalidates the configuration in any case.) >>> For #3, you're unlikely to have a configuration written for a freshly >>> available device. >> sorry, I don't understand this statement.... >> but has me worried for virt hot add/remove of assigned devices > > Essentially, hot-adding a virtual device would not bring the device > up automatically if you're using the old network service; you'd have > to run 'ifup' by hand. > hot-adding a VF-nic to a Linux kvm guest brings up the hot-added (VF) nic in the guest today.... am I missing what you mean? >>> For #4, bringing up the device automatically can cause more issues >>> than it solves. (We've seen this happen for vlans, for example.) >> This is done all the time (on KVM hosts) to take down PF driver& load >> PF+VF drivers for SRIOV-capable devices. > > This would be a different device with a different hardware address, > correct? > Nope; typically start up an SRIOV device in PF-only mode (igb, for example), then do an rmmod igb; modprobe igb max_vfs=7; same PF mac; new VF mac's. and as VF's are added & removed from guests, they may be removed & added back to host. > Bill -- devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/devel
