On Apr 26, 2010, at 7:16 AM, Neil Brown wrote: > On Mon, 26 Apr 2010 06:28:44 -0400 > Christoph Hellwig <hch@xxxxxxxxxxxxx> wrote: > >> On Mon, Apr 26, 2010 at 08:16:33PM +1000, Neil Brown wrote: >>> uuids - as Ted as shown - are not necessarily unique (despite the name), >>> so using them to perform a lookup will either be imperfect (not good for a >>> kernel interface) or will impose extra uniqueness which would break current >>> configurations. >> >> UUID can easily be made unique. XFS for example refuses to mount >> filesystems with duplicate UUIDs. >> > > In the email from Ted that I referred to he identified two cases where > UUIDs are not unique. Are you suggesting that we should cause those > use-cases - which work today - to fail? So XFS won't allow you to make a read-only snapshot of an XFS file system, and then mount it somewhere else? Really? -- Ted -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
