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
--
Bjoern A. Zeeb bzeeb at Zabbadoz dot NeT
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