On Sat, 8 Sep 2007 13:00:36 +0100 Christoph Hellwig <[EMAIL PROTECTED]> wrote:
> On Sat, Sep 08, 2007 at 07:32:27AM -0400, Jeff Garzik wrote: > > FUJITA Tomonori wrote: > > >Yeah, iommu code ignores the lld limitations (the problem is that the > > >lld limitations are in request_queue and iommu code can't access to > > >request_queue). There is no way to tell iommu code about the lld > > >limitations. > > > > > > This fact very much wants fixing. > > > Absolutely. Unfortunately everyone wastes their time on creating workarounds > instead of fixing the underlying problem. Any ideas on how to fix this? I chatted to Jens and James on this last week. - we could just copies the lld limitations to device structure. it's hacky but device structure already has hacky stuff. - we could just link device structure to request_queue structure so that iommu code can see request_queue structure. - we could remove the lld limitations in request_queue strucutre and have a new strucutre (something like struct io_restrictions). then somehow we could link the new structure with request_queue and device strucutres. - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
