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Consider a bfq_queue bfqq that is about to be merged with another bfq_queue new_bfqq. The processes associated with bfqq are cooperators of the processes associated with new_bfqq. So, if bfqq has a waker, then it is reasonable (and beneficial for throughput) to assume that all these processes will be happy to let bfqq's waker freely inject I/O when they have no I/O. So this commit makes new_bfqq inherit bfqq's waker. Tested-by: Jan Kara <jack@suse.cz> Signed-off-by: Paolo Valente <paolo.valente@linaro.org> Tested-by: Oleksandr Natalenko <oleksandr@natalenko.name> Link: https://lore.kernel.org/r/20210304174627.161-4-paolo.valente@linaro.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.