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Loading a new mapping table, the dm-raid target's constructor retrieves the volatile reshaping state from the raid superblocks. When the new table is activated in a following resume, the actual reshape position is retrieved. The reshape driven by the previous mapping can already have finished on small and/or fast devices thus updating raid superblocks about the new raid layout. This causes the actual array state (e.g. stripe size reshape finished) to be inconsistent with the one in the new mapping, causing hangs with left behind devices. This race does not occur with usual raid device sizes but with small ones (e.g. those created by the lvm2 test suite). Fix by no longer transferring stale/inconsistent raid_set state during preresume. Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com> |
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| drivers | ||
| firmware | ||
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| include | ||
| init | ||
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| .cocciconfig | ||
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| README | ||
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.