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Using targets such as dm-linear, a mapped device can be created to contain only conventional zones. Such device should not be treated as zoned as it does not contain any mandatory sequential write required zone. Since such device can be randomly written, we can modify dm_set_zones_restrictions() to set the mapped device zoned queue limit to false to expose it as a regular block device. The function dm_check_zoned() does this after counting the number of conventional zones of the mapped device and comparing it to the total number of zones reported. The special dm_check_zoned_cb() report zones callback function is used to count conventional zones. Signed-off-by: Damien Le Moal <dlemoal@kernel.org> Reviewed-by: Benjamin Marzinski <bmarzins@redhat.com> Link: https://lore.kernel.org/r/20240501110907.96950-2-dlemoal@kernel.org Signed-off-by: Jens Axboe <axboe@kernel.dk> |
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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 reStructuredText 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.