In message <20201025213509.GA1671@brick>, Edward Tomasz Napierala writes: > On 1025T0717, Cy Schubert wrote: > > In message <CAPjTQNEq2ukvkNoF6bsymTai52XV1tbu3TxW4rrN4n5hASMFqQ@mail.gmail. > c > > om> > > , Oliver Pinter writes: > > > On Sunday, October 25, 2020, Edward Tomasz Napierala <tr...@freebsd.org> > > > wrote: > > > > > > > Author: trasz > > > > Date: Sun Oct 25 14:09:00 2020 > > > > New Revision: 367038 > > > > URL: https://svnweb.freebsd.org/changeset/base/367038 > > > > > > > > Log: > > > > Remove the check that prevents creating "loops" from mount_nullfs(8). > > > > > > > > > > > The simple question is: why? > > > > I was about to ask that myself. > > > > The why is usually more important than the how. > > Two reasons. > > First, from what I can tell this is an artificial limitation which serves > no purpose. I thought it was to prevent some kind of deadlock between > vnodes, so I asked kib@, and he mentioned removing that very limitation > from the kernel code; thus, it looks to me like a historical leftover. > > Second, I've stumbled upon this when trying to nullfs-mount '/' on > '/compat/ubuntu/bsd/', which would be useful for autochroot functionality, > when (or if) it becomes a thing.
Thanks. -- Cheers, Cy Schubert <cy.schub...@cschubert.com> FreeBSD UNIX: <c...@freebsd.org> Web: https://FreeBSD.org NTP: <c...@nwtime.org> Web: https://nwtime.org The need of the many outweighs the greed of the few. _______________________________________________ svn-src-head@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
