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e6c28a26b7
Test generic/390 in data=journal mode often triggers a warning that ext4_do_writepages() tries to start a transaction on frozen filesystem. This happens because although all dirty data is properly written, jbd2 checkpointing code writes data through submit_bh() and as a result only buffer dirty bits are cleared but page dirty bits stay set. Later when the filesystem is frozen, writeback code comes, tries to write supposedly dirty pages and the warning triggers. Fix the problem by calling sync_filesystem() once more after flushing the whole journal to clear stray page dirty bits. [ Applied fixup patches to address crashes when running data=journal tests; see links for more details -- TYT ] Signed-off-by: Jan Kara <jack@suse.cz> Link: https://lore.kernel.org/r/20230308142528.12384-1-jack@suse.cz Reported-by: Eric Biggers <ebiggers@kernel.org> Link: https://lore.kernel.org/all/20230319183617.GA896@sol.localdomain Link: https://lore.kernel.org/r/20230323145404.21381-1-jack@suse.cz Link: https://lore.kernel.org/r/20230323145404.21381-2-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.