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03ed5a8cda
lockdep triggers a warning from time to time when running a regression test: rnbd_client L685: </dev/nullb0@bla> Device disconnected. rnbd_client L1756: Unloading module workqueue: WQ_MEM_RECLAIM rtrs_client_wq:rtrs_clt_reconnect_work [rtrs_client] is flushing !WQ_MEM_RECLAIM ib_addr:process_one_req [ib_core] WARNING: CPU: 2 PID: 18824 at kernel/workqueue.c:2517 check_flush_dependency+0xad/0x130 The root cause is workqueue core expect flushing should not be done for a !WQ_MEM_RECLAIM wq from a WQ_MEM_RECLAIM workqueue. In above case ib_addr workqueue without WQ_MEM_RECLAIM, but rtrs_wq WQ_MEM_RECLAIM. To avoid the warning, remove the WQ_MEM_RECLAIM flag. Fixes: |
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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.