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4049dc96b8
When the target executes a disconnect and the host triggers a reconnect immediately, the reconnect command still finds an existing association. The reconnect crashes later on because nvmet_fc_delete_target_assoc blindly removes resources while the reconnect code wants to use it. To address this, nvmet_fc_find_target_assoc should not be able to lookup an association which is being removed. The association list is already under RCU lifetime management, so let's properly use it and remove the association from the list and wait for a grace period before cleaning up all. This means we also can drop the RCU management on the queues, because this is now handled via the association itself. A second step split the execution context so that the initial disconnect command can complete without running the reconnect code in the same context. As usual, this is done by deferring the ->done to a workqueue. Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Daniel Wagner <dwagner@suse.de> Signed-off-by: Keith Busch <kbusch@kernel.org> |
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
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.