Mark Robson <markxr@xxxxxxxxx> writes: > On 13 June 2011 15:21, Jeff Moyer <jmoyer@xxxxxxxxxx> wrote: > >> Hi, >> >> O_DIRECT requires alignment to the underlying device's logical block >> size. It used to be pretty safe to assume this was 512 bytes, but >> that's no longer the case with the introduction of 4k logical sector >> size devices. >> >> Feel free to change the wording in the man page as you see fit, but >> here's an example of how it might be fixed... >> > > It seems to me, that we should cite in the man page the system call required > to get the underlying device's block size. Is this statfs(2) ? Hi, Mark, I've added back the CC list, not sure why it was dropped. I think you would need to issue a BLKSSZGET ioctl to the block device. Cheers, Jeff -- To unsubscribe from this list: send the line "unsubscribe linux-man" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
