Hello! I wonder if it makes sense to modify the /sys/fs/bcache/*/bdev*/readahead value. By default, it is zero, meaning: no readahead.
What are use cases of this? What are sensible values for it? Does it depend on the underlying filesystem the cache is attached to? (in my case, btrfs) I didn't find any useful information about it. Only something vague like "not needed if bcache is on SSD" by combining different texts on the same subject. The only one documented information about it is that higher values may increase cache miss rate (well, that makes sense). -- Replies to list only preferred. -- To unsubscribe from this list: send the line "unsubscribe linux-bcache" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
