Re: BTRFS error (device dm-4): failed to run delayed ref for logical 350223581184 num_bytes 16384 type 176 action 1 ref_mod 1: -117 (kernel 6.11.2)

[Marc MERLIN <marc@merlins.org>]

On Tue, Feb 25, 2025 at 07:16:31PM +1030, Qu Wenruo wrote:
> Ref#13 is the root that mentioned has the existing one.
> 
> I have no idea why it shows up like this.
> 
> But since the fs passes btrfs check, mind to dump the following tree block?
> 
> # btrfs ins dump-tree -t extent <device> | grep "(350223581184 " -A 50
> 
> I want to make sure if the ref 398 exists on disk, or it's generated at
> runtime.

sauron:~# btrfs ins dump-tree -t extent /dev/mapper/pool1 | grep "350223581184 " -A 50
sauron:~#
 
Mmmmh, so 350223581184 is gone now since it's been 20 days already since
my original post.
I can try to re-enable balance and see if things crash or not.
 
> I believe your machine is a ThinkPad P17 gen2 with a mobile Xeon, with DDR4
> ECC memory support, but I'm not sure if your memory sticks have ECC.

model name      : Intel(R) Xeon(R) W-11855M CPU @ 3.20GHz
sauron:~# dmesg | grep -i EDAC
[    1.293722] EDAC MC: Ver: 3.0.0
sauron:~# dmidecode -t memory | grep Width
        Total Width: 64 bits
        Data Width: 64 bits
        Total Width: 64 bits
        Data Width: 64 bits
        Total Width: 64 bits
        Data Width: 64 bits
        Total Width: 64 bits
        Data Width: 64 bits

That seems do say I do not have ECC or width would be 72 from what I
read :-/

> Just as a precaution, please run a memtest (I know it will be painfully
> slow, so please only run it after the above dump is taken).

I do not have the system with me right now and I think memtest cannot be
run from inside linux, correct?
If so, I can do this when I get home and can reboot the system.

Or is there a version I can run from inside linux?

Marc
-- 
"A mouse is a device used to point at the xterm you want to type in" - A.S.R.
 
Home page: http://marc.merlins.org/                       | PGP 7F55D5F27AAF9D08