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When we're remounting the filesystem readonly, remove all CoW preallocations prior to going ro. If the fs goes down after the ro remount, we never clean up the staging extents, which means xfs_check will trip over them on a subsequent run. Practically speaking, the next mount will clean them up too, so this is unlikely to be seen. Since we shut down the cowblocks cleaner on remount-ro, we also have to make sure we start it back up if/when we remount-rw. Found by adding clonerange to fsstress and running xfs/017. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> |
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Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. 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.