Just so you guys know, I am not ignoring this issue. I think I can fix
all the issues in one shot. I am going to post some lio/ceph stuff for
my day job this week, and then I will try to post my patch for this issue.

On 01/27/2016 06:01 AM, Sagi Grimberg wrote:
>>> Since iscsi responses from the kernel are multicast we might get into
>>> a situation where multiple discoveryd handle the same response.
>>> With this commit we use a shared mutex to lock between the discoveryd
>>> forks
>>> so each fork will handle its intended portal.
>>> So we wait for login and stale logouts to finish between releasing
>>> the mutex.
>>> Signed-off-by: Roi Dayan <r...@mellanox.com>
>>> Signed-off-by: Sagi Grimberg <sa...@mellanox.com>
>>> ---
>>> Hi,
>>> The issue was discovered after working with discoveryd and offload
>>> driver
>>> which needed the following patch that was already submitted to the
>>> mailing list:
> Hi Mike, long time... :)
>> Are the problem events the discovery related ones like the ep_connect
>> ones, or is this a problem with the normal session login/logout events
>> too?
> This problem of multiple instances handling a NL multicast event, so
> even for session_create etc... Each time we ask the kernel to do
> something we're bound to race.
> The tcp discoveryd doesn't use the kernel to establish the discovery
> session so it's not a problem there.
>> Do we still hit the same problem if someone were to run iscsiadm while
>> this is running, or if we were to just run multiple instances of
>> iscsiadm?
> Exactly. running two instances of iscsiadm triggers the same race
> conditions and we may end up asking the kernel to create the leading
> conn on the a session id twice (and other weird things).
> We'll need to fix that too, but we figured we'd start small and fix a
> real bug report.

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