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Subject: [Bug 211990] iscsi fails to reconnect and does not release devices
Date: Sat, 20 Aug 2016 17:29:52 +0000
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D211990

--- Comment #5 from Ben RUBSON <ben.rubson@gmail.com> ---
I made further troubleshooting.

Regarding the number of iscsid processes which increases, I've found timeout
settings which permit to always have only one process per target :
sysctl kern.iscsi.login_timeout=3D85
sysctl kern.iscsi.iscsid_timeout=3D5
sysctl kern.iscsi.ping_timeout=3D5
These are based on net.inet.tcp.keepinit which is 75000 by default (75
seconds).

Regarding the "30" processes limit, it can be tuned with the "-d" option to
iscsid (through /etc/rc.d/iscsid for example).

And the most important, regarding the bug :
when devices do not want to correctly reconnect, I found that it is because
iscsi is stuck in the following :
cam_sim_free(is->is_sim, TRUE /*free_devq*/);
However I don't know why.

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