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a6343e4d92
When we're servicing an INUMBERS or BULKSTAT request or running quotacheck, grab an empty transaction so that we can use its inherent recursive buffer locking abilities to detect inode btree cycles without hitting ABBA buffer deadlocks. This patch requires the deferred inode inactivation patchset because xfs_irele cannot directly call xfs_inactive when the iwalk itself has an (empty) transaction. Found by fuzzing an inode btree pointer to introduce a cycle into the tree (xfs/365). Signed-off-by: Darrick J. Wong <djwong@kernel.org> Reviewed-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
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.