On Mon, Jun 17, 2019 at 02:19:52PM +0200, Christoph Hellwig wrote: > Hi Martin, > > we've always had a bit of a problem communicating the block layer > queue limits to the DMA layer, which needs to respect them when > an IOMMU that could merge segments is used. Unfortunately most > drivers don't get this right. Oddly enough we've been mostly > getting away with it, although lately dma-debug has been catching > a few of those issues. Ping? What happened to this set of bug fixes?