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When ext4 is mounted without journal, with discard mount option, and on a device not supporting trim, we print error for each and every freed extent. This is not only useless but actively harmful. Instead ignore the EOPNOTSUPP error. Trim is only advisory anyway and when the filesystem has journal we silently ignore trim error as well. Signed-off-by: Jan Kara <jack@suse.cz> Reviewed-by: Zhang Yi <yi.zhang@huawei.com> Link: https://lore.kernel.org/r/20240213101601.17463-1-jack@suse.cz Signed-off-by: Theodore Ts'o <tytso@mit.edu>
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.