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If reshape is interrupted(for example, echo frozen to sync_action), then rdev replacement can be set. It's safe because reshape is always prior to resync in md_check_recovery(). However, if system reboots, then kernel will complain cannot handle concurrent replacement and reshape and this array is not able to assemble anymore. Fix this problem by don't allow replacement until reshape is done. Reported-by: Peter Neuwirth <reddunur@online.de> Link: https://lore.kernel.org/linux-raid/e2f96772-bfbc-f43b-6da1-f520e5164536@online.de/ Signed-off-by: Yu Kuai <yukuai3@huawei.com> Signed-off-by: Song Liu <song@kernel.org> Link: https://lore.kernel.org/r/20230512015610.821290-2-yukuai1@huaweicloud.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.