Re: Scrub aborts due to corrupt leaf

[Larkin Lowrey]

On 10/10/2018 12:04 PM, Holger Hoffstätte wrote:
On 10/10/18 17:44, Larkin Lowrey wrote:
(..)
About once a week, or so, I'm running into the above situation where
FS seems to deadlock. All IO to the FS blocks, there is no IO
activity at all. I have to hard reboot the system to recover. There
are no error indications except for the following which occurs well
before the FS freezes up:
BTRFS warning (device dm-3): block group 78691883286528 has wrong 
amount of free space
BTRFS warning (device dm-3): failed to load free space cache for 
block group 78691883286528, rebuilding it now

Do I have any options other the nuking the FS and starting over?

Unmount cleanly & mount again with -o space_cache=v2.

It froze while unmounting. The attached zip is a stack dump captured via 
'echo t > /proc/sysrq-trigger'. A second attempt after a hard reboot worked.

--Larkin
<<attachment: sysrq-t.zip>>