Michael S. Tsirkin wrote:
By the way, I was thinking about SA queries, and I came to a conclusion
that we have an unfixable race at module unload: nothing I as the user of
SA do in my callback can ensure that my callback is not still running
when my module is unloaded.
The problem here is lack of explicit registration wth SA: I just push queries
so there's no time SA can flush its queues for me.
The only easy way out that I see is some kind of sa_flush function that
will flush MAD wqs, and ask all users to call that.
And I think we have the same bug in addr so this needs a flush function too.
Makes sense?
Both ib_sa and ib_addr will always perform exactly one callback per request. A
user only needs to wait for that callback to occur. The rdma_cm does this for
ib_addr, and ib_multicast will do this for ib_sa.
- Sean
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