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7e384dbb57
Add a test_kfree_rcu_wq_destroy test to verify a kmem_cache_destroy() from a workqueue context. The problem is that, before destroying any cache the kvfree_rcu_barrier() is invoked to guarantee that in-flight freed objects are flushed. The _barrier() function queues and flushes its own internal workers which might conflict with a workqueue type a kmem-cache gets destroyed from. One example is when a WQ_MEM_RECLAIM workqueue is flushing !WQ_MEM_RECLAIM events which leads to a kernel splat. See the check_flush_dependency() in the workqueue.c file. If this test does not emits any kernel warning, it is passed. Reviewed-by: Keith Busch <kbusch@kernel.org> Co-developed-by: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com> Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
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.