On 06/29/2018 02:10 PM, Marc MERLIN wrote:
On Fri, Jun 29, 2018 at 02:02:19PM +0800, Su Yue wrote:
I have figured out the bug is lowmem check can't deal with shared tree block
in reloc tree. The fix is simple, you can try the follow repo:
https://github.com/Damenly/btrfs-progs/tree/tmp1
Not sure if I undertand that you meant, here.
Sorry for my unclear words.
Simply speaking, I suggest you to stop current running check.
Then, clone above branch to compile binary then run
'btrfs check --mode=lowmem $dev'.
Please run lowmem check "without =--repair" first to be sure whether
your filesystem is fine.
The filesystem is not fine, it caused btrfs balance to hang, whether
balance actually broke it further or caused the breakage, I can't say.
Then mount hangs, even with recovery, unless I use ro.
This filesystem is trash to me and will require over a week to rebuild
manually if I can't repair it.
Understood your anxiety, a log of check without '--repair' will help
us to make clear what's wrong with your filesystem.
Thanks,
Su
Running check without repair for likely several days just to know that
my filesystem is not clear (I already know this) isn't useful :)
Or am I missing something?
Though the bug and phenomenon are clear enough, before sending my patch,
I have to make a test image. I have spent a week to study btrfs balance
but it seems a liitle hard for me.
thanks for having a look, either way.
Marc
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