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Disable zerocopy by default for now. It's causing some problems in pcap

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consumers which fork after the shared pages have been setup.  pflogd(8)
is an example.  The problem is understood and there is a fix coming in
shortly.

Folks who want to continue using it can do so by setting

net.bpf.zerocopy_enable

to 1.

Discussed with:	rwatson
This commit is contained in:
Christian S.J. Peron 2009-03-10 14:28:19 +00:00
parent 161832a1cf
commit ffeeb9241a
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=189620
1 changed files with 1 additions and 1 deletions
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2
sys/net/bpf.c
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@ -124,7 +124,7 @@ SYSCTL_NODE(_net, OID_AUTO, bpf, CTLFLAG_RW, 0, "bpf sysctl");
int bpf_maxinsns = BPF_MAXINSNS;
SYSCTL_INT(_net_bpf, OID_AUTO, maxinsns, CTLFLAG_RW,
&bpf_maxinsns, 0, "Maximum bpf program instructions");
static int bpf_zerocopy_enable = 1;
static int bpf_zerocopy_enable = 0;
SYSCTL_INT(_net_bpf, OID_AUTO, zerocopy_enable, CTLFLAG_RW,
&bpf_zerocopy_enable, 0, "Enable new zero-copy BPF buffer sessions");
SYSCTL_NODE(_net_bpf, OID_AUTO, stats, CTLFLAG_MPSAFE | CTLFLAG_RW,