Two VFS topics

Posted Jun 10, 2023 10:59 UTC (Sat) by bluca (subscriber, #118303)
Parent article: Two VFS topics

> Christoph Hellwig came up with the idea of providing a monotonically increasing disk sequence number

Note that this was a slip of the tongue. The idea of diskseq was actually Lennart's, Matteo Croce (MSFT at the time) implemented it in the kernel (Hellwig reviewed and merged it, from whence came the confusion) and I implemented the userspace side in udev and systemd. Most likely unnecessary to cover all this in the article, but would be good to remove that reference for correctness sake.

Two VFS topics

Posted Jun 10, 2023 12:28 UTC (Sat) by mezcalero (subscriber, #45103) [Link] (7 responses)

A lennartism you say? Oh my god, that means Devuan can't use it! Just like /run/, /etc/os-release and all that other stuff!

Two VFS topics

Posted Jun 10, 2023 16:59 UTC (Sat) by bluca (subscriber, #118303) [Link]

Yes, can you believe that? Where's my pitchfork?!

Two VFS topics

Posted Jun 12, 2023 13:49 UTC (Mon) by kilobyte (subscriber, #108024) [Link] (5 responses)

Lennartism is to move everything under /usr, others want to get rid of it.

Two VFS topics

Posted Jun 12, 2023 16:53 UTC (Mon) by mezcalero (subscriber, #45103) [Link] (4 responses)

Uh, not sure what this his to do with this article, but I'll bite anyway: the great thing about unifying all vendor resources in /usr/ is that you can have a single immutable vendor supplied tree that is fully separated from the local, writable resources in /etc/, /var and the rest of the root dir. It would not be smart to make that wonderful separation go away, and lumping the whole contents into /usr/ with no clear logic anymore about who owns what.

Two VFS topics

Posted Jun 12, 2023 19:09 UTC (Mon) by anselm (subscriber, #2796) [Link] (2 responses)

I don't think people who use words like “Lennartism” are interested in reasoned argument.

Two VFS topics

Posted Jun 12, 2023 21:13 UTC (Mon) by Klaasjan (subscriber, #4951) [Link]

The irony here is that the word Lennartism was introduced in this thread by mezcalero, who is none other than... himself (unless I'm mistaken, in which case the joke is on me)

Two VFS topics

Posted Jun 13, 2023 2:53 UTC (Tue) by Cyberax (✭ supporter ✭, #52523) [Link]

mezcalero _is_ Lennart.

But I guess your statement is still true :)

Immutable /usr

Posted Jun 19, 2023 15:00 UTC (Mon) by DemiMarie (subscriber, #164188) [Link]

Not only can /usr be immutable, it can be an dm-verity volume that is digitally signed and whose hash is measured into the TPM. This allows desktop systems to finally have proper verified boot, which Android and ChromiumOS have had for years.