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This patch splits the single queue into separate bps and iops queues. Now, an IO request must first pass through the bps queue, then the iops queue, and finally be dispatched. Due to the queue splitting, we need to modify the throtl add/peek/pop function. Additionally, the patch modifies the logic related to tg_dispatch_time(). If bio needs to wait for bps, function directly returns the bps wait time; otherwise, it charges bps and returns the iops wait time so that bio can be directly placed into the iops queue afterward. Note that this may lead to more frequent updates to disptime, but the overhead is negligible for the slow path. Signed-off-by: Zizhi Wo <wozizhi@huawei.com> Reviewed-by: Yu Kuai <yukuai3@huawei.com> Signed-off-by: Zizhi Wo <wozizhi@huaweicloud.com> Link: https://lore.kernel.org/r/20250506020935.655574-6-wozizhi@huaweicloud.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.