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232143b605
Currently, the nr_hw_queues update path manages two disjoint xarrays — one for elevator tags and another for elevator type — both used during elevator switching. Maintaining these two parallel structures for the same purpose adds unnecessary complexity and potential for mismatched state. This patch unifies both xarrays into a single structure, struct elv_change_ctx, which holds all per-queue elevator change context. A single xarray, named elv_tbl, now maps each queue (q->id) in a tagset to its corresponding elv_change_ctx entry, encapsulating the elevator tags, type and name references. This unification simplifies the code, improves maintainability, and clarifies ownership of per-queue elevator state. Reviewed-by: Ming Lei <ming.lei@redhat.com> Reviewed-by: Yu Kuai <yukuai@fnnas.com> Signed-off-by: Nilay Shroff <nilay@linux.ibm.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
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 reStructuredText 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.