Christoph Hellwig wrote: > > So i'm torn about the 'syscall versus ioctl' issue, i'd > > like to avoid making interface design mistakes and i'd > > like to solicit some opinions about this. I've attached > > the perfcounters ioctl patch below. > > Only add a syscall if it has _one_ clear defined purpose, > which has kernel-wide meaning. One clear defined purpose which comes to mind is a "trim" or "punch" system call, for making holes in files as well as trimming block devices. Several other OSes have that capability on files. I don't remember - does TRIM guarantee the blocks read zeros afterwards? It would be tidy if it does, as it could have the same meaning with files. -- Jamie -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
