On Wed, Oct 03, 2018 at 04:58:13PM -0400, Doug Ledford wrote: [...] > > I don't think this is the only problem the net stack has in regards to > device name changes. It's supported, but because it's expected to be a > "do it once, early on, then never do it again" thing, they don't worry > too much about the lingering bugs in the name change operations. We > used to have a multiyear bug in IPoIB (maybe still do?) where if you Does the below commit (in mainline & stable) solve the issue you describe? 771a52584096 IB/IPoIB: ibX: failed to create mcg debug file > change the name of an IPoIB device, and you are using debugfs, the > debugfs device name didn't get changed and when you registered your next > IPoIB device you would get warnings about "Unable to create debugfs file > for dev ib0". I don't think we are going to solve those races today, so > if this code works, I see no reason to block it. We just need to know > that if the net folks ever get serious about solving those races, we'll > need to do the same. > > -- > Doug Ledford <dledford@xxxxxxxxxx> > GPG KeyID: B826A3330E572FDD > Key fingerprint = AE6B 1BDA 122B 23B4 265B 1274 B826 A333 0E57 2FDD
