kern/164534: net.bpf.zerocopy_enable=1 makes pflogd eat cpu and hang

[Volodymyr Kostyrko]

>Number:         164534
>Category:       kern
>Synopsis:       net.bpf.zerocopy_enable=1 makes pflogd eat cpu and hang
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Fri Jan 27 09:30:12 UTC 2012
>Closed-Date:
>Last-Modified:
>Originator:     Volodymyr Kostyrko
>Release:        RELENG_9
>Organization:
None
>Environment:
FreeBSD green.tandem.local 9.0-STABLE FreeBSD 9.0-STABLE #1 r230528: Wed Jan 25 14:46:26 EET 2012     arcade at green.tandem.local:/usr/obj/usr/src/sys/MINIMAL_4BSD  amd64
>Description:
When running kernel with `option ZEROCOPY` and `net.bpf.zerocopy_enable=1` starting pflogd results in its instant hang and 100% cpu consumption.
>How-To-Repeat:

>Fix:
Don't play with options not in GENERIC I suppose...

>Release-Note:
>Audit-Trail:
>Unformatted: