Is a high witness refcount indicative of a missing unlock?

Lars lars at
Sun Mar 29 19:29:53 UTC 2015

I am poking around for a cause for my repeating deadlock issues on my system based on r 279869. ddb show witness show the “vnode interlock” and the “zfs” locks both with reference counts over 200K. Obviously they are related, and there is a find running (all the filesystems on this machine are zfs ( minus the specialty ones like devfs).

I don’t see any other withness entry with reference counts even in the ballpark of these two, so does this indicate that we have a vnode/zfs path were we don’t unlock?


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