On Mon, Jan 22, 2007 at 11:53:50AM +0000, Bjoern A. Zeeb wrote: > On Mon, 22 Jan 2007, Konstantin Belousov wrote: > > >kib 2007-01-22 11:25:22 UTC > > > > FreeBSD src repository > > > > Modified files: > > sys/fs/deadfs dead_vnops.c > > sys/kern vfs_lookup.c > > Log: > > Below is slightly edited description of the LOR by Tor Egge: > > > > -------------------------- > > [Deadlock] is caused by a lock order reversal in vfs_lookup(), where > > [some] process is trying to lock a directory vnode, that is the parent > > directory of covered vnode) while holding an exclusive vnode lock on > > covering vnode. > >.... > > To fix the LOR, ups@ noted that when crossing the mount point, ni_dvp > > is actually not used by the callers of namei. Thus, placeholder deadfs > > vnode vp_crossmp is introduced that is filled into ni_dvp. > > which of the LOR #s on "The LOR page" can be marked "patched" with > this commit? > > http://sources.zabbadoz.net/freebsd/lor.html
None, your page lists only LORs that are detectable by WITNESS. This one is between lockmgr lock and vfs_busy(), both of them are invisible to WITNESS.
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