mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2026-05-10 07:59:42 -04:00
ea49f3e73c
Introduce new function, qgroup_trace_new_subtree_blocks(), to iterate all new tree blocks in a reloc tree. So that qgroup could skip unrelated tree blocks during balance, which should hugely speedup balance speed when quota is enabled. The function qgroup_trace_new_subtree_blocks() itself only cares about new tree blocks in reloc tree. All its main works are: 1) Read out tree blocks according to parent pointers 2) Do recursive depth-first search Will call the same function on all its children tree blocks, with search level set to current level -1. And will also skip all children whose generation is smaller than @last_snapshot. 3) Call qgroup_trace_extent_swap() to trace tree blocks So although we have parameter list related to source file tree, it's not used at all, but only passed to qgroup_trace_extent_swap(). Thus despite the tree read code, the core should be pretty short and all about recursive depth-first search. Signed-off-by: Qu Wenruo <wqu@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
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.
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.