On Tue, Dec 01, 2020 at 01:45:42PM +0000, Christoph Hellwig wrote: > On Tue, Dec 01, 2020 at 01:36:22PM +0000, Pavel Begunkov wrote: > > Yeah, that's the idea, but also wanted to verify that callers don't > > free it while in use, or if that's not the case to make it conditional > > by adding a flag in iov_iter. > > > > Can anybody vow right off the bat that all callers behave well? > > Yes, this will need a careful audit, I'm not too sure offhand. For the > io_uring case which is sortof the fast path the caller won't free them > unless we allow the buffer unregistration to race with I/O. Loop's aio usage is fine, just found fd_execute_rw_aio() isn't good. Thanks, Ming
