Hi, not sure whether it’s possible, but we tried space_cache=v2 and obviously after working fine in staging it broke in production. Or rather: we upgraded from 4.4 to 4.9 and enabled the space_cache. Our production volume is around 50TiB usable (underlying HW Raid 6). The machine crashes silently every 15 hours or so and takes _ages_ to reboot. It current is stuck trying to mount the local filesystems and I guess btrfs is doing something, but I don’t have shell access yet. I’m wondering whether we can downgrade by booting back into 4.4 or will this break things even further? (We’ve had some unpleasant surprises with FS’ in the last months, so I thought I’d rather ask.) Kind regards, Christian -- Christian Theune · ct@xxxxxxxxxxxxxxx · +49 345 219401 0 Flying Circus Internet Operations GmbH · http://flyingcircus.io Forsterstraße 29 · 06112 Halle (Saale) · Deutschland HR Stendal HRB 21169 · Geschäftsführer: Christian. Theune, Christian. Zagrodnick
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