Re: [PATCH v2] nbd: Don't use workqueue to handle recv work
From: Christoph Hellwig <hch@infradead.org>
Date: 2021-12-29 17:35:57
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On Mon, Dec 27, 2021 at 05:12:41PM +0800, Xie Yongji wrote:
The rescuer thread might take over the works queued on the workqueue when the worker thread creation timed out. If this happens, we have no chance to create multiple recv threads which causes I/O hung on this nbd device.
If a workqueue is used there aren't really 'receive threads'. What is the deadlock here?