commit 179ea3791a98b27c41ced2fbae94a2ce41c2f089
Author: Matthew Dillon <[email protected]>
Date: Thu May 26 22:34:15 2022 -0700
kernel - Fix lock order reversal in cache_resolve_mp()
* This function is a helper when path lookups cross mount
boundaries.
* Locking order between namecache records and vnodes must
be { ncp, vnode }.
* Fix a lock order reversal in cache_resolve_mp() which
was doing { vnode, ncp }. This deadlock is very rare
because mount points are almost never evicted from the
namecache. However, dsynth can trigger this bug due
to its heavy use of null mounts and high concurrent path
lookup loads.
Summary of changes:
sys/kern/vfs_cache.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/179ea3791a98b27c41ced2fbae94a2ce41c2f089
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DragonFly BSD source repository
