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9ef3932e25
This driver previously required we have a special check for IO submitted to nvme IO queues that are temporarily suspended. That is no longer necessary since blk-mq provides a quiesce, so any IO that actually gets submitted to such a queue must be ended since the queue isn't going to start back up. This is fixing a condition where we have fewer IO queues after a controller reset. This may happen if the number of CPU's has changed, or controller firmware update changed the queue count, for example. While it may be possible to complete the IO on a different queue, the block layer does not provide a way to resubmit a request on a different hardware context once the request has entered the queue. We don't want these requests to be stuck indefinitely either, so ending them in error is our only option at the moment. Signed-off-by: Keith Busch <keith.busch@intel.com> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Sagi Grimberg <sagi@grimberg.me> Signed-off-by: Jens Axboe <axboe@fb.com> |
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Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.