CVS commit: src/tests/net/bpf

["Antti Kantee" <pooka%netbsd.org@localhost>]

Module Name:    src
Committed By:   pooka
Date:           Mon Dec  6 11:32:01 UTC 2010

Modified Files:
        src/tests/net/bpf: Makefile
Added Files:
        src/tests/net/bpf: t_bpf.c

Log Message:
Add an xfail test for the mbuf leak described in PR kern/44196.

This is yet another example of a simple test which would be much
trickier to execute against the host kernel.  You would either need
to put networking in a complete lockdown, or do some "statistical"
methods where you trigger the bug many many times and attempt to
ascertain a rising trend in mbuf count.  And, of course, the leaked
mbufs don't go away from the host kernel once the test ends.  In
contrast, we *know* that there is no other networking activity in
a rump kernel, so we can execute the operation exactly once, plus
the leaked mbuf "disappears" when the test is done.


To generate a diff of this commit:
cvs rdiff -u -r1.1 -r1.2 src/tests/net/bpf/Makefile
cvs rdiff -u -r0 -r1.1 src/tests/net/bpf/t_bpf.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.