[Bug 228399] vnlru uses 100% cpu

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=228399

            Bug ID: 228399
           Summary: vnlru uses 100% cpu
           Product: Base System
           Version: 11.1-RELEASE
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: standards
          Assignee: standards at FreeBSD.org
          Reporter: avkarenow at o2.pl

Hello,

I'm using FreeBSD 11.1-RELEASE with ZFS.

>From periodic `find` is running every night and it causes a problem with vnlru
- ~100% CPU usage. `Find` finishing its work about a few hours later (before
upgrade, on FreeBSD 10.3 it was a few minutes and minimal usage of CPU).

When I run `find` at day manually - it also using 100% CPU by vnlru.

The "solution" is bump kern.maxvnodes value and vnlru CPU usage is about 0% for
few minutes and again I need to bump kern.maxvnodes until `find` finish its
job.

Any ideas?


Best Regards

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