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For each removed mount we need to calculate where the slaves will end up. To avoid duplicating that work, do it for all mounts to be removed at once, taking the mounts themselves out of propagation graph as we go, then do all transfers; the duplicate work on finding destinations is avoided since if we run into a mount that already had destination found, we don't need to trace the rest of the way. That's guaranteed O(removed mounts) for finding destinations and removing from propagation graph and O(surviving mounts that have master removed) for transfers. Reviewed-by: Christian Brauner <brauner@kernel.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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 reStructuredText 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.