> > The only alternative I can think of is to try a normal registration > call, and if that fails, try again using the physical flag. Would > this work, or does the normal registration call succeed, but produce > an unusable MR? > > This would not work because of a subtlety of the physical memory > registration. The reason is that actually NULL is passed as address in > the call. Check the github link to my patch in the other E-Mail, there > is a line that replaces the address with NULL. > > If a user passes an illegal virtual address the call should fail. But > if the libfabric call falls back to the physical address registration, > this would then actually succeed as the address is replaced with NULL.
I looked back at the patches and related documentation. IMO, the verbs physical memory registration interface is just weird. There is no association between the actual pages and the region AFAICT. - Sean _______________________________________________ ofiwg mailing list [email protected] https://lists.openfabrics.org/mailman/listinfo/ofiwg
