On Sat, Oct 24, 2020 at 08:59:59AM +0100, Christoph Hellwig wrote: > Btw, I think we also need to use this nonblocking version from > dma_free_contiguous. dma_free* is defined to not block. In practice > callers mostly care if they also did GFP_ATOMIC allocations, which > don't dip into CMA, but I think we do have a problem. It's a good point! Do you mind mastering a patch? I can include it into the patchset. Thanks!