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228804a35c
In __gfs2_glock_put(), remove the glock from the lru list *after* dropping the glock lock. This prevents deadlocks against gfs2_scan_glock_lru(). In gfs2_scan_glock_lru(), make sure that the glock's reference count is zero before moving the glock to the dispose list. This skips glocks that are marked dead as well as glocks that are still in use. Additionally, switch to spin_trylock() as we already do in gfs2_dispose_glock_lru(); this alone would also be enough to prevent deadlocks against __gfs2_glock_put(). 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.