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If anything goes wrong with the counters that track the number of requests, I/O locks up. Make such scenarios easier to debug by adding invariant checks for the request counters. Additionally, check that BFQ queues are empty before these are freed. Cc: Jan Kara <jack@suse.cz> Cc: Yu Kuai <yukuai3@huawei.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Link: https://lore.kernel.org/r/20230516223853.1385255-1-bvanassche@acm.org 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 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.