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Diffstat (limited to 'share/man/man9/mbuf.9')
| -rw-r--r-- | share/man/man9/mbuf.9 | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/share/man/man9/mbuf.9 b/share/man/man9/mbuf.9 index b10e6ea73a7c..9e325a28be37 100644 --- a/share/man/man9/mbuf.9 +++ b/share/man/man9/mbuf.9 @@ -522,6 +522,17 @@ In case of failure, it returns .Dv NULL and attempts to restore the chain to its original state. .El +.Sh STRESS TESTING +When running a kernel compiled with the option MBUF_STRESS_TEST, +the following sysctl-controlled options may be used to create +various failure / extreme cases for testing of network drivers +and other mbuf-reliant parts of the kernel. +.Pp +.Va net.inet.ip.mbuf_frag_size +causes ip_output to fragment outgoing mbuf chains into fragments of +the specified size. Setting this option to 1 is an excellent way to +test the long mbuf chain handling ability of network drivers. +.El .Sh RETURN VALUES See above. .Sh HISTORY |