Re: 4.11.6 / more corruption / root 15455 has a root item with a more recent gen (33682) compared to the found root node (0)

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On Mon, Jul 31, 2017 at 2:17 PM, Marc MERLIN <marc@xxxxxxxxxxx> wrote:
> On Tue, Aug 01, 2017 at 12:07:14AM +0300, Ivan Sizov wrote:
>> 2017-07-09 10:57 GMT+03:00 Martin Steigerwald <martin@xxxxxxxxxxxx>:
>> > Hello Marc.
>> >
>> > Marc MERLIN - 08.07.17, 21:34:
>> >> Sigh,
>> >>
>> >> This is now the 3rd filesystem I have (on 3 different machines) that is
>> >> getting corruption of some kind (on 4.11.6).
>> >
>> > Anyone else getting corruptions with 4.11?
>> Yes, a lot. There are at least 3 cases, probably I've missed something.
>> https://www.spinics.net/lists/linux-btrfs/msg67177.html
>> https://www.spinics.net/lists/linux-btrfs/msg67681.html
>> https://unix.stackexchange.com/questions/369133/dealing-with-btrfs-ref-backpointer-mismatches-backref-missing/369275
>
> Indeed. My main server is happy back on 4.9.36 and while my laptop is
> stuck on 4.11 due to other kernel issues that prevent me from going back
> to 4.9, it only corrupted a single filesystem so far, and no other ones
> that I've noticed yet.
> Hopefully that will hold :-/
>

Marc, do you have quotas enabled?  IIRC, you're a send/receive user.
The combination of quotas and btrfs receive can corrupt your
filesystem, as shown by the xfstest I sent to the list a little while
ago.

-Justin
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