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When a process migrates to another cgroup and the original cgroup is deleted, the restrictions of throttled bios cannot be removed. If the restrictions are set too low, it will take a long time to complete these bios. Refer to the process of deleting a disk to remove the restrictions and issue bios when deleting the cgroup. This makes difference on the behavior of throttled bios: Before: the limit of the throttled bios can't be changed and the bios will complete under this limit; Now: the limit will be canceled and the throttled bios will be flushed immediately. References: [1] https://lore.kernel.org/r/20220318130144.1066064-4-ming.lei@redhat.com [2] https://lore.kernel.org/all/da861d63-58c6-3ca0-2535-9089993e9e28@huaweicloud.com/ Signed-off-by: Li Lingfeng <lilingfeng3@huawei.com> Acked-by: Tejun Heo <tj@kernel.org> Link: https://lore.kernel.org/r/20240817071108.1919729-1-lilingfeng@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.