Sorry, please ignore this mail, I’ll send a new one > 2020年8月21日 下午1:17，Carter Li 李通洲 <carter.li@xxxxxxxxxx> 写道： > > Hi Jens, > > I have some ( maybe stupid ) questions about IORING_OP_ASYNC_CANCEL: > > 1. Does IORING_OP_ASYNC_CANCEL always complete inline ( i.e. finishes before the io_uring_enter syscall returns )? > > 2. Does recent changes of async buffered reads have any impact with cancelation? Can we cancel a buffered IORING_OP_READV operation after it’s started? Although the disk->kernel DMA operation is not cancelable, can we cancel the kernel->userland data copy? > > 3. I heard that all buffered writes are serialized on the inode mutex. If a buffered IORING_OP_WRITEV is blocked on the node mutex, can we cancel it? > > Thanks in advance, > Carter
