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34f55d0b3a
currently, the rbd_wait_state_locked() will wait forever if we can't get our state locked. Example: rbd map --exclusive test1 --> /dev/rbd0 rbd map test1 --> /dev/rbd1 dd if=/dev/zero of=/dev/rbd1 bs=1M count=1 --> IO blocked To avoid this problem, this patch introduce a timeout design in rbd_wait_state_locked(). Then rbd_wait_state_locked() will return error when we reach a timeout. This patch allow user to set the lock_timeout in rbd mapping. Signed-off-by: Dongsheng Yang <dongsheng.yang@easystack.cn> Reviewed-by: Ilya Dryomov <idryomov@gmail.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
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.
See Documentation/00-INDEX for a list of what is contained in each file.
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.