> Umm, so is this patch really needed? Where did the patch come from -- > is it needed to fix something actually seen, or was it written just > based on some theoretical understanding? > > I'm confused... > > - R. The patch is needed. We've seen it on the real system. We did fix it on the real system. ...and it conforms to theory... although theory is a bit confusing here.
let me try to summarize: ioremap checks for 64k boundary (actually page boundary) nopage does H_ENTER in 4k granularity if it's configured like that for a certain type of POWER processor. so you have to adjust the ioremap to page boundary, and THEN access at the offset within the 64k. Took quite a while until we understood that code path.... ;-) Christoph R. _______________________________________________ openib-general mailing list [email protected] http://openib.org/mailman/listinfo/openib-general To unsubscribe, please visit http://openib.org/mailman/listinfo/openib-general
