Since the reported trigger was an ssh flood, I tried
ssh -T -o 'PreferredAuthentications hostbased' localhost
(which on my system will result in a quick failed ssh because hostbased
authentication is not enabled in the server) in a tight, parallelized loop
with this construct:
for i in `seq 100000`; do echo localhost ; done \
| xargs -d '\n' -n1 -P8 --verbose sh -c \
"ssh -T -o 'PreferredAuthentications hostbased' localhost || exit 1"
The '|| exit 1' construct is needed because otherwise ssh exits with
code 255, which causes xargs to stop running jobs.
However, I did not encounter the kernel maxproc error during my test.
My maxproc is the default as far as I'm aware:
$ sysctl -a | grep maxproc
kern.maxproc: 6164
kern.maxprocperuid: 5547
and it's very likely that my test is getting nowhere near this limit.
kfreebsd-image-9-amd64:
Installed: 9.0-10
Candidate: 9.0-10
Version table:
*** 9.0-10 0
500 http://ftp.us.debian.org/debian/ wheezy/main kfreebsd-amd64 Packages
100 /var/lib/dpkg/status
openssh-server:
Installed: 1:6.0p1-4
Candidate: 1:6.0p1-4
Version table:
1:6.1p1-4 0
1 http://ftp.us.debian.org/debian/ experimental/main kfreebsd-amd64
Packages
*** 1:6.0p1-4 0
500 http://ftp.us.debian.org/debian/ wheezy/main kfreebsd-amd64 Packages
100 /var/lib/dpkg/status
libc0.1:
Installed: 2.13-38
Candidate: 2.13-38
Version table:
*** 2.13-38 0
500 http://ftp.us.debian.org/debian/ wheezy/main kfreebsd-amd64 Packages
100 /var/lib/dpkg/status
Jeff
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