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If the control system would wait for at least half a second, and there's been no reqs hitting the backing disk for awhile: use an alternate mode where we have at most one contiguous set of writebacks in flight at a time. (But don't otherwise delay). If front-end IO appears, it will still be quick, as it will only have to contend with one real operation in flight. But otherwise, we'll be sending data to the backing disk as quickly as it can accept it (with one op at a time). Signed-off-by: Michael Lyle <mlyle@lyle.org> Reviewed-by: Tang Junhui <tang.junhui@zte.com.cn> Acked-by: Coly Li <colyli@suse.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
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.