Re: [RFC PATCH] Btrfs: fix full backref problem when inserting shared block reference

[Miao Xie <miaox@cn.fujitsu.com>]

On Thu, 9 Aug 2012 09:21:29 +0200, David Sterba wrote:
> On Thu, Aug 09, 2012 at 08:48:02AM +0200, David Sterba wrote:
>> and down, no problems so far, and the "wikipedia" test-subvol stresstest
>> that caused trouble to one of your patches is also ok. I'll do some more
>> testing on other machines and will report problems eventually.
> 
> So it won't be so easy :)
> 
> The test generated 15+ G of data, ~500 snapshots, then umount and fsck:
> 
> lots of
> 
> ref mismatch on [9655283712 4096] extent item 1, found 0
> Incorrect local backref count on 9655283712 root 5 owner 589776 offset 110592 found 0 wanted 1 back 0x86badf0
> backpointer mismatch on [9655283712 4096]
> owner ref check failed [9655283712 4096]
> 
> and then
> 
> checking fs roots
> root 2854 inode 233882 errors 2500
> root 2880 inode 271639 errors 2200
> 
> and it's not finished yet, other types of error may pop up.

Thanks for your test, I'll look into it.

Regards 
Miao