This survived light testing for me: https://people.freebsd.org/~mjg/unionfs-interlock.diff
note unionfs instantly panics with DEBUG_VFS_LOCKS regardless of any of this work. On 8/27/19, Cy Schubert <cy.schub...@gmail.com> wrote: > In message > <CAGudoHE=L8MQy=Sb5h04BZvehiSaxmek-kYmEdZ1PpCM2kM24A@mail.gmail.c > om> > , Mateusz Guzik writes: >> On 8/27/19, Cy Schubert <cy.schub...@gmail.com> wrote: >> > Making progress: >> > >> > Unread portion of the kernel message buffer: >> > >> > panic: null_unlock: LK_INTERLOCK passed >> > cpuid = 2 >> > time = 1566868081 >> > KDB: stack backtrace: >> > db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame >> > 0xfffffe0054a954e0 >> > vpanic() at vpanic+0x19d/frame 0xfffffe0054a95530 >> > panic() at panic+0x43/frame 0xfffffe0054a95590 >> > null_unlock() at null_unlock+0x8a/frame 0xfffffe0054a955d0 >> > VOP_UNLOCK_APV() at VOP_UNLOCK_APV+0x56/frame 0xfffffe0054a955f0 >> > unionfs_unlock() at unionfs_unlock+0x124/frame 0xfffffe0054a95650 >> > VOP_UNLOCK_APV() at VOP_UNLOCK_APV+0x56/frame 0xfffffe0054a95670 >> > vfs_domount() at vfs_domount+0xc3f/frame 0xfffffe0054a958a0 >> > vfs_donmount() at vfs_donmount+0x934/frame 0xfffffe0054a95940 >> > sys_nmount() at sys_nmount+0x69/frame 0xfffffe0054a95980 >> > amd64_syscall() at amd64_syscall+0x3ae/frame 0xfffffe0054a95ab0 >> > fast_syscall_common() at fast_syscall_common+0x101/frame >> > 0xfffffe0054a95ab0 >> > --- syscall (378, FreeBSD ELF64, sys_nmount), rip = 0x2bed6a4a, rsp = >> > 0x7fffffffe2e8, rbp = 0x7fffffffec70 --- >> > Uptime: 1m35s >> > >> >> Ok, this explains everything. I did not think anyone uses unionfs, >> let alone stacked on top of nullfs. I'll have a patch later. > > It's for a few jails. Thanks for persevering. > > > -- > Cheers, > Cy Schubert <cy.schub...@cschubert.com> > FreeBSD UNIX: <c...@freebsd.org> Web: http://www.FreeBSD.org > > The need of the many outweighs the greed of the few. > > > -- Mateusz Guzik <mjguzik gmail.com> _______________________________________________ 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"
