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| Filename | Latest commit message | Latest commit date |
|---|---|---|
e678934cbe
join_running_log_trans checks btrfs_root::log_root outside of btrfs_root::log_mutex to avoid contention on the mutex. Turns out this check is not necessary because the two callers of join_running_log_trans (both of which deal with removing entries from the tree-log during unlink) explicitly check whether the respective inode has been logged in the current transaction. If it hasn't then it won't have any items in the tree-log and call path will return before calling join_running_log_trans. If the check passes, however, then it's guaranteed that btrfs_root::log_root is set because the inode is logged. Those guarantees allows us to remove the speculative as well as the implicity and tricky memory barrier. Reviewed-by: Filipe Manana <fdmanana@suse.com> Signed-off-by: Nikolay Borisov <nborisov@suse.com> Signed-off-by: David Sterba <dsterba@suse.com> |
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| README | ||
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.