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One queue will be reserved for non-polled IO when nvme.poll_queues is greater or equal than the number of IO queues that the nvme controller can provide. Currently the reserved queue for non-polled IO will reuse the interrupt used by admin queue in this case, e.g, vector 0. This can work and the performance may not be an issue since the admin queue is used unfrequently. However this behaviour may be inconsistent with that when nvme.poll_queues is smaller than the number of IO queues available. Thus allocate separate interrupt for this reserved queue, and thus make the behaviour consistent. Signed-off-by: Jeffle Xu <jefflexu@linux.alibaba.com> [hch: minor cleanups, mostly to the pre-existing surrounding code] Signed-off-by: Christoph Hellwig <hch@lst.de>
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.