On 2019/3/2 上午8:20, Chris Murphy wrote:
> Problem happens with btrfsprogs 4.19.1
> 
> https://bugzilla.kernel.org/show_bug.cgi?id=202717
> 
> That bug report includes the trace in user space; but I've also
> processed the resulting coredump file with gdb and attached that to
> the bug report.
> 
> Before using --clear-space-cache v1, btrfs scrub and btrfs check came
> up clean no errors. Following the crash, I compiled brfsprogs 4.20.2
> and ran 'btrfs check' which finds corruption.
> 
> I've taken no further action, and the btrfs check output gives me no
> useful plain language information what the next steps are. So I'm just
> gonna leave it alone since it's a backup volume anyway.

Is the backup volume binary dump of the original fs?

I'm interesting why clear space cache v1 doesn't work, to find out that,
we need tree dump of the original fs.

And is the original check done by latest btrfs-progs or v4.19.1?

Thanks,
Qu