Quoting r. Hal Rosenstock <[EMAIL PROTECTED]>: > Subject: Re: [PATCH for-2.6.18] IB/cma: option to limitMTU to 1K > > On Wed, 2006-09-13 at 17:49, Michael S. Tsirkin wrote: > > Quoting r. Hal Rosenstock <[EMAIL PROTECTED]>: > > > Subject: Re: [PATCH for-2.6.18] IB/cma: option to limitMTU to 1K > > > > > > On Wed, 2006-09-13 at 17:09, Michael S. Tsirkin wrote: > > > > Quoting r. Hal Rosenstock <[EMAIL PROTECTED]>: > > > > > Subject: Re: [PATCH for-2.6.18] IB/cma: option to limitMTU to 1K > > > > > > > > > > On Wed, 2006-09-13 at 15:05, Michael S. Tsirkin wrote: > > > > > > Quoting r. Hal Rosenstock <[EMAIL PROTECTED]>: > > > > > > > > If I understood Michael's comment properly, this will have the > > > > > > > > side > > > > > > > > effect that IPoIB won't work since IPoIB requires 2K MTUs. As > > > > > > > > far as > > > > > > > > I know, there is no way to specify whether a path is needed for > > > > > > > > UD vs. > > > > > > > > RC in the path query. > > > > > > > > > > > > > > I don't know how either. I don't think it can be done (at least > > > > > > > currently per the standard). > > > > > > > > > > > > We don't really need to know whether path is for RC or UD QP. > > > > > > IPoIB needs MTU >= 2K so it should set mtu selector to >= 2K. > > > > > > > > > > That's the default and not the minimum MTU (for IPoIB). > > > > > > > > How isn't it? > > > > > > Look at RFC 4391 as to the requirement. > > > > I'm talking about our implementation not the spec. > > Don't we risk interop issues by relying on things not required in the > spec ?
Yo confuse me. IPoIB currently assumes that broadcast group MTU <= path MTU for any path, but does not set MTU selector in SA query so SA could thinkably give it any MTU. This is assumption not in the spec and I think should be fixed ASAP, by setting path selector. -- MST _______________________________________________ openib-general mailing list openib-general@openib.org http://openib.org/mailman/listinfo/openib-general To unsubscribe, please visit http://openib.org/mailman/listinfo/openib-general
