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ee7570546e
Waiting on a btree node write with btree locks held can deadlock, if the write errors: the write error path has to do do a btree update to drop the pointer to the replica that errored. The interior update path has to wait on in flight btree writes before freeing nodes on disk. Previously, this was done in bch2_btree_interior_update_will_free_node(), and could deadlock; now, we just stash a pointer to the node and do it in btree_update_nodes_written(), just prior to the transactional part of the update. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
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.