On Wed, Sep 08, 2021 at 11:06:51AM +0100, Pavel Begunkov wrote: > Make read_iter_zero() to honor IOCB_NOWAIT, so /dev/zero can be > advertised as FMODE_NOWAIT. This helps subsystems like io_uring to use > it more effectively. Set FMODE_NOWAIT for /dev/null as well, it never > waits and therefore trivially meets the criteria. I do not understand, why would io_uring need to use /dev/zero and how is this going to help anything? What workload does this help with? thanks, greg k-h
