On Wed, Sep 11, 2024 at 05:34:42PM +0100, Pavel Begunkov wrote: > Add a second io_uring cmd for block layer implementing asynchronous > write zeroes. It reuses helpers we've added for async discards, and > inherits the code structure as well as all considerations in regards to > page cache races. It has to be supported by underlying hardware to be > used, otherwise the request will fail. A fallback version is implemented > separately in a later patch. Except that as far as I can tell it doesn't implement a fallback, but an entirely different command leading to applications breaking when just using the command and the hardware doesn't support it. Nacked-by: Christoph Hellwig <hch@xxxxxx> to this incomplete API that will just create incompatbilities.
