On Thu, 16 Apr 2015 13:41:21 +1200 Matt Grant wrote: > Hi! > > When ever I delete a large snapshot this stalls all the processes on my system for 30 minutes plus, kernel v19.2. Btrfs-cleaner is taking 100% CPU when completely stalled. Every few minutes its say 99.8% and satall abates and  processes/io happen. By any chance do you use this on SSD with TRIM enabled? -- With respect, Roman