Re: [PATCH v2.6.36-rc7] infiniband: update workqueue usage

From: Ralph Campbell
Date: Tue Oct 19 2010 - 13:22:14 EST


On Tue, 2010-10-19 at 08:24 -0700, Tejun Heo wrote:

> * qib_cq_wq is a separate singlethread workqueue. Does the queue
> require strict single thread execution ordering? IOW, does each
> work have to be executed in the exact queued order and no two works
> should execute in parallel? Or was the singlethreadedness chosen
> just to reduce the number of workers?

The work functions need to be called in-order and single threaded
or memory will be freed multiple times and other "bad things".

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