On 2019/9/12 下午6:27, Anand Jain wrote: > > > There is previous work [1] > > [1] > https://lore.kernel.org/linux-btrfs/1461812780-538-1-git-send-email-anand.j...@oracle.com/ > > > > I guess it was on purpose that missing device is not part of > alloc chunk, so to have lesser impact due to writehole bug. > My target is to fix the writehole first, and then this and > other bugs. > >> [FIX] >> Just consider the missing devices as WRITABLE, so we allocate new chunks >> on them to maintain old profiles. > > IMO. In a 3-disks raid1 when one of the disk fails, we still > need the _new writes_ not to be degraded. Just use two available > disks. This fix fails that idea which is being followed now.
So priority comes, use existing, and only when it's impossible, consider degraded/missing device? > > Thanks, Anand >
