On Wed, Mar 02, 2016 at 05:08:00PM -0800, Jin Qian wrote: > Hi - > > Can we allocate an official device major number for virtio devices? > Currently it's using 240-254 (LOCAL/EXPERIMENTAL USE). The reason we > ask for this is because userspace will need to treat virtio block > devices differently and need a way to detect such device. For example, > it checks major number to detect scsi and mmc device. > > https://android-review.googlesource.com/#/c/195240 > > With dynamic major numbers 240-254, we might treat other devices as > virtio block device incorrectly.
You shouldn't treat them incorrectly, devtmpfs handles this for you automatically, so I'd recommend using the dynamic majors please. And what in-kernel code is using the "experimental" range today? Do you have a pointer to that? We should fix that now... thanks, greg k-h
