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mod_dav-fs scales badly when a few clients run PROPFIND requests to discover directory content. Each PROPFIND involves lockdiscovery, which in turn waits for a locked access to the file containing the lock database. Performances quickly drop because of lock contention on this file. Add a DAVLockDiscovery configuration directive that allows lockdiscovery to be disabled. Its argument is an Apache expression so that flexible configuration are possible (per-request). When lock discovery is disabled, an empty lockdiscovery property is returned on POPRFIND methods, just like if no lock was set on the object. That should cause no regression, since a client cannot rely on lockdiscovery to decide when a file should be accessed, the LOCK methood must be used. If DAVLockDiscovery is not specified, the behavior is unchanged. PR 66313. Submitted by: Emmanuel Dreyfus <manu netbsd.org> Reviewed by: ylavic git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1904638 13f79535-47bb-0310-9956-ffa450edef68