On Tue, Mar 03, 2015 at 05:10:22PM -0800, Daniel Ehrenberg wrote: > > What's to guarantee that your ABI change won't break any of those? > > I guess it's impossible to guarantee, but if there is an error, it'll > be that an -EOVERFLOW error is suppressed and the high bits of the > major:minor pair are shaved off by the userspace program. I would > suspect that this would just make debugging harder, rather than > actually break an automated program which counts on getting EOVERFLOW > from a huge block device, but no way to know. The block device has to > actually exist for this to happen, and all we're talking about is stat > failing. So it's replacing an an error code with erroneous way to get > data about a device node (erroneous just because userspace ignores > some of the bits with the answer).
All it takes is more than 16 SCSI disks, AFAICS, and use of open-coded MINOR() somewhere in old userland code... -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
