Qu Wenruo posted on Mon, 16 May 2016 10:24:23 +0800 as excerpted: > IIRC clear_cache option is fs level option. > So the first mount with clear_cache, then all subvolume will have > clear_cache.
Question: Does clear_cache work with a read-only mount? I could see it being like the log replay and being done even on ro mounts, particularly since unlike the log replay, clear_cache is a specific mount option so could be seen as specifically requested even if otherwise ro. Or not. So I don't know. He mentioned root, which is normally mounted read-only first. That's what got me thinking about it. Does that complicate things? If root is mounted ro without clear_cache by the initr*, will a subsequent remount,rw,clear_cache do it? And for those like me who keep root mounted ro by default, would clear_cache work at all, or would it not work until such time as I mounted root, or some other subvolume (which I don't have here to worry about, but for those who do...) writable? -- Duncan - List replies preferred. No HTML msgs. "Every nonfree program has a lord, a master -- and if you use the program, he is your master." Richard Stallman -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
