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When disk failure happens and the array has a spare drive, resync thread kicks in and starts to refill the spare. However it may get blocked by a retry thread that resubmits failed IO to a mirror and itself can get blocked on a barrier raised by the resync thread. Acked-by: Nigel Croxon <ncroxon@redhat.com> Signed-off-by: Vitaly Mayatskikh <vmayatskikh@digitalocean.com> Signed-off-by: Song Liu <songliubraving@fb.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.
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.