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4c065dbce1
Ordered workqueues does not currently follow changes made to the global unbound cpumask because per-pool workqueue changes may break the ordering guarantee. IOW, a work function in an ordered workqueue may run on an isolated CPU. This patch enables ordered workqueues to follow changes made to the global unbound cpumask by temporaily plug or suspend the newly allocated pool_workqueue from executing newly queued work items until the old pwq has been properly drained. For ordered workqueues, there should only be one pwq that is unplugged, the rests should be plugged. This enables ordered workqueues to follow the unbound cpumask changes like other unbound workqueues at the expense of some delay in execution of work functions during the transition period. Signed-off-by: Waiman Long <longman@redhat.com> Signed-off-by: Tejun Heo <tj@kernel.org> |
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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.