[Bug 191916] New: pflogd eat cpu and hang with net.bpf.zerocopy_enable=0

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=191916

            Bug ID: 191916
           Summary: pflogd eat cpu and hang with net.bpf.zerocopy_enable=0
           Product: Base System
           Version: 9.3-RELEASE
          Hardware: i386
                OS: Any
            Status: Needs Triage
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: lukasz at wasikowski.net

After update to 9.3-RELEASE pflog started to eat 100% CPU and needs kill -9 to
shut (this is on i386). Some details:

# uname -a
FreeBSD vesper.wasikowski.net 9.3-RELEASE FreeBSD 9.3-RELEASE #30 r268740: Wed
Jul 16 16:54:40 CEST 2014    
root at vesper.wasikowski.net:/usr/obj/usr/src/sys/vesper  i386

# sysctl net.bpf.zerocopy_enable
net.bpf.zerocopy_enable: 0

# ps axufw | grep [p]flogd
_pflogd   5718 100.0  0.0   9628   1740 ??  R     9:58AM  0:37.24 pflogd:
[initializing] (pflogd)
root      5717   0.0  0.0   9628   1744 ??  Is    9:58AM  0:00.01 pflogd:
[priv] (pflogd)


# grep -Ev "^#|^$" /boot/loader.conf
zfs_load="YES"
vm.kmem_size="1400M"
vm.kmem_size_max="1400M"
vfs.zfs.arc_max="1200M"
vfs.zfs.prefetch_disable="0"
geom_mirror_load="YES"
if_bge_load="YES"
if_lagg_load="YES"
random_load="YES"
sem_load="YES"
sysvmsg_load="YES"
sysvsem_load="YES"
sysvshm_load="YES"
accf_http_load="YES"
linprocfs_load="YES"
accf_data_load="YES"
loader_logo="beastiebw"

Kernel config: http://pastebin.com/8kSgHxJN

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