Re: [PATCH v1 1/2] mm: cma: introduce cma_release_nowait()

From: Christoph Hellwig
Date: Sat Oct 24 2020 - 04:00:23 EST


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.