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SubjectRe: [PATCH 4/4] virtio_blk: use disk_name_format() to support mass of disks naming
On Fri, Mar 30, 2012 at 08:26:06AM -0700, Tejun Heo wrote:
> On Fri, Mar 30, 2012 at 05:53:52PM +0800, Ren Mingxin wrote:
> > The current virtblk's naming algorithm only supports 263 disks.
> > If there are mass of virtblks(exceeding 263), there will be disks
> > with the same name.
> >
> > By renaming "sd_format_disk_name()" to "disk_name_format()"
> > and moving it into block core, virtio_blk can use this function to
> > support mass of disks.
> >
> > Signed-off-by: Ren Mingxin <>
> I guess it's already way too late but why couldn't they have been
> named vdD-P where both D and P are integers denoting disk number and

So, if a device name ends in digit the partition code adds delimiter
'p' automatically and this is already in use by md. So, partitioned
md devices are named mdDpP where D and P are base 10 number indicating
the sequence like md12p4. So, let's please add comment that new
drivers should name their devices PREFIX%d where the sequence number
can be allocated by ida.



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