The signal(7) man page also states clearly that a local disk is not a "slow" device, so this seems moot. read(2), readv(2), write(2), writev(2), and ioctl(

The signal(7) man page also states clearly that a local disk is not a "slow" device, so this seems moot. read(2), readv(2), write(2), writev(2), and ioctl(2) calls on "slow" devices. A "slow" device is one where the I/O call may block for an indefinite time, for example, a terminal, pipe, or socket. If an I/O call on a slow device has already transferred some data by the time it is interrupted by a signal handler, then the call will return a success status (normally, the number of bytes transferred). Note that a (local) disk is not a slow device according to this definition; I/O operations on disk devices are not interrupted by signals.