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There may be extreme case as below: For one section contains one segment, and there are total 100 segments with 10% over-privision ratio in f2fs partition, fggc_threshold will be rounded down to 460 instead of 460.8 as below caclulation: sbi->fggc_threshold = div_u64((u64)(main_count - ovp_count) * BLKS_PER_SEC(sbi), (main_count - resv_count)); If section usage is as: 60 segments which contain 460 valid blocks 40 segments which contain 462 valid blocks As valid block number in all sections is large than fggc_threshold, so none of them will be chosen as candidate due to incorrect fggc_threshold. Let's just soften the term of choosing foreground GC candidates. Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
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.