Re: dma api errors with swiotlb

[Thomas HellstrÃm (VMware)]

On 9/4/19 2:17 PM, Christoph Hellwig wrote:
> A call to dma_max_mapping_size() to limit the maximum I/O size solves
> that problem.  With the latest kernel that should actually be done
> automatically by the SCSI midlayer for you.

Hmm, OK. I guess with a sufficient queue depth and many mappings waiting 
for DMA completion, the SWIOTLB may fill up anyway...

I'll see if I can come up with something.

Thanks,

Thomas