mirror of
https://github.com/torvalds/linux.git
synced 2026-09-25 21:21:09 -04:00
Kuanling Huang
eef16ba269
By analyzing the perf on btrfs send, we found it take large amount of cpu time on page_cache_sync_readahead. This effort can be reduced after switching to asynchronous one. Overall performance gain on HDD and SSD were 9 and 15 percent if simply send a large file. Signed-off-by: Kuanling Huang <[email protected]> Reviewed-by: Nikolay Borisov <[email protected]> Reviewed-by: David Sterba <[email protected]> Signed-off-by: David Sterba <[email protected]>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. 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.