On Sat, Jun 17, 2017 at 01:59:47PM -0600, Jens Axboe wrote: > Add four flags for the pwritev2(2) system call, allowing an application > to give the kernel a hint about what on-media life times can be > expected from a given write. > > The intent is for these values to be relative to each other, no > absolute meaning should be attached to these flag names. > > Set aside 3 bits in the iocb flags structure to carry this information > over from the pwritev2 RWF_WRITE_LIFE_* flags. What is the strong use case for the per-I/O flags? I'd much rather stick to fcntl only for now if we can.
