On 14/09/20 15:48, Roger Heflin wrote: > It should be noted that mythtv is a badly behaved IO application, it > does a lot of sync calls that effectively for the most part makes > linux's write cache small. Sounds like the devs need reminding of the early days of ext4. Iiuc, if that ran on an early ext4 you wouldn't have got ANY successful recordings AT ALL. At an absolute minimum, that sort of behaviour needs to be configurable, because if the user is running mythtv on anything other than a dedicated machine then it's going to kill performance for anything else. Cheers, Wol