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Before this patch, function gfs2_ail_empty_gl did not return errors it encountered from __gfs2_trans_begin. Those errors usually came from the fact that the file system was made read-only, often due to unmount (but theoretically could be due to -o remount,ro), which prevented the transaction from starting. The inability to start a transaction prevented its revokes from being properly written to the journal for glocks during unmount (and transition to ro). That meant glocks could be unlocked without the metadata properly revoked in the journal. So other nodes could grab the glock thinking that their lvb values were correct, but in fact corresponded to the glock without its revokes properly synced. That presented as lvb mismatch errors. This patch allows gfs2_ail_empty_gl to return the error properly to the caller. Signed-off-by: Bob Peterson <rpeterso@redhat.com> Signed-off-by: Andreas Gruenbacher <agruenba@redhat.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.