On 6/18/15, 8:09 PM, Minh Tran wrote:
From: Minh Duc Tran <MinhDuc.Tran@xxxxxxxxxxxxx> This blocking is ok if we use software iscsi or iser where each connection has a separate host. In the case of hw iscsi offload, one host could have hundreds of connections and some connections may have IOs running which makes host->host_busy is always TRUE. Another problem is the host_lock taken here is disruptive to other connections' EH paths. Wouldn't using target_busy a better choice here?
Do you talk to John :) I had told him to do that a couple days ago when you guys emailed me about this offlist.
However, I think Christoph wants to remove target_busy so you need to think of something else. I think you could take the session eh_mutex in the libiscsi session and conn teardown functions and rely on refcounting and state checks in the eh callouts.
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