quoted

quoted

quoted

quoted

The workqueue which frees the memory and doesn't allocate memory
during execution is supposed to be marked as WQ_MEM_RECLAIM. This
flag will cause to priority increase for such workqueue during low

memory conditions.

quoted

quoted

Which to my understanding means that CM workqueue should not use it
as on each CM connect, by definition the ULP allocates memory (qp,

cq etc).

quoted

From my understanding too.
That workqueue was introduced in 2005, in a977049dacde ("[PATCH] IB:
Add the kernel CM implementation"), it is not clear if it was
intentionally.

Hal,
do you remember the rationale there?

Sean is best to respond to this.

I believe the work queue was to avoid potential deadlocks that could arise

from

using the MAD work queue.  The original submission did not mark the work queue
with WQ_MEM_RECLAIM.  I do not know when that change was added.

By the way, the queue I'm actually having the problem with is in the iwcm, not
the ibcm.  I think we should remove WQ_MEM_RECLAIM from all the CM queues
because I agree now that ulps potentially can/will allocate memory in the
contect of these workqueues...


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