On 06/19/2017 12:27 AM, Christoph Hellwig wrote: > 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. Fine, I guess I should just have dusted off the 2 year old patchset, as that was _exactly_ what that did. -- Jens Axboe
