iser-target: Fix implicit termination of connections

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In situations such as bond failover, The new session establishment
implicitly invokes the termination of the old connection.

So, we don't want to wait for the old connection wait_conn to completely
terminate before we accept the new connection and post a login response.

The solution is to deffer the comp_wait completion and the conn_put to
a work so wait_conn will effectively be non-blocking (flush errors are
assumed to come very fast).

We allocate isert_release_wq with WQ_UNBOUND and WQ_UNBOUND_MAX_ACTIVE
to spread the concurrency of release works.

Reported-by: Slava Shwartsman <valyushash@gmail.com>
Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Cc: <stable@vger.kernel.org> # v3.10+
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

...

This commit is contained in:

Sagi Grimberg 2014-12-02 16:57:29 +02:00 • committed by Nicholas Bellinger

parent ca6c1d82d1

commit b02efbfc9a

2 changed files with 35 additions and 8 deletions

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42

drivers/infiniband/ulp/isert/ib_isert.c

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1

drivers/infiniband/ulp/isert/ib_isert.h

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