Messages in this thread | | | Subject | Re: New model for managing dev_t's for partitionable block devices | Date | Wed, 29 Jan 2003 15:25:26 +0100 | From | Horst von Brand <> |
| |
Steven Dake <sdake@mvista.com> said: > I was thinking of an entirely new model for partitionable block devices. > Here is how it would work: > > Each physical disk would be assigned a minor number in a group of > majors. So assume a major was chosen of 150, 151, 152, 153, there would > be a total of 1024 physical disks that could be mapped. Then the device > mapper code could be used to provide partition devices in another > major/group of majors. > > The advantage of this technique is that instead of wasting tons of > minors on partitions that are never used, partitions could be > dynamically allocated out of the minor list, allowing for thousands of > disks with varying numbers of partitions each. Further instead of each > block device (such as i2o, scsi, etc) having their own set of majors for > each partitionable disk (which wastes dev_t address space) everything > would be compressed into the same set of majors.
Great idea! Add another partition, and the minors for everything else on the system change. Not! -- Dr. Horst H. von Brand User #22616 counter.li.org Departamento de Informatica Fono: +56 32 654431 Universidad Tecnica Federico Santa Maria +56 32 654239 Casilla 110-V, Valparaiso, Chile Fax: +56 32 797513 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |