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1d16c2761b
When inserting extent backref, in order to check whether refs other than inline refs are used, we always use path keep locks for tree search, which will increase the lock contention of extent tree. We do not need the parent node every time to determine whether normal refs are used. It is only needed when the extent item is the last item in a leaf. Therefore, we change it to first use keep_locks=0 for search. If the extent item happens to be the last item in the leaf, we then change to keep_locks=1 for the second search to reduce lock contention. Reviewed-by: Filipe Manana <fdmanana@suse.com> Signed-off-by: Robbie Ko <robbieko@synology.com> Signed-off-by: David Sterba <dsterba@suse.com> |
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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.