On 2019/11/5 上午8:47, Tomasz Chmielewski wrote:
> On 2019-11-02 12:38, Qu Wenruo wrote:
>> On 2019/11/2 上午9:13, Tomasz Chmielewski wrote:
>>> I'm getting these recently from time to time (first noticed in 5.3.x,
>>> but maybe they were showing up before and I didn't notice).
>>>
>>> Everything seems to work fine so far. Anything to worry about?
>>
>> This is a warning about unaligned device size.
>>
>> You can either fix it by reducing the device size by 4K for each device,
>> or use btrfs rescue fix-dev-size unmounted to repair.
> 
> Unfortunately "btrfs rescue fix-device-size" doesn't seem to help. I'm
> still seeing these entries in dmesg some time after using the command.
> 
> Also:
> 
> # umount /home
> 
> # btrfs rescue fix-device-size /dev/sdb4
> Fixed device size for devid 2, old size: 3950855921152 new size:
> 3950855917568
> Fixed device size for devid 3, old size: 3950855921152 new size:
> 3950855917568
> Fixed super total bytes, old size: 7901711842304 new size: 7901711835136
> Fixed unaligned/mismatched total_bytes for super block and device items

So far so good.

> 
> # btrfs rescue fix-device-size /dev/sdb4
> No device size related problem found
> 
> # btrfs rescue fix-device-size /dev/sda4
> No device size related problem found
> 
> # dmesg -c
> 
> # mount /home
> 
> 
> Now let's try to unmount and see what "btrfs rescue fix-device-size"
> shows again - I'd expect "No device size related problem found", correct?
> 
> 
> # umount /home
> 
> # btrfs rescue fix-device-size /dev/sda4
> parent transid verify failed on 265344253952 wanted 42646 found 46119
> parent transid verify failed on 265344253952 wanted 42646 found 46119
> parent transid verify failed on 265344253952 wanted 42646 found 46119

This is not correct. What happened during your /home mount and unmount?

The fs looks already screwed up.

Thanks,
Qu

> Ignoring transid failure
> Fixed super total bytes, old size: 7901711842304 new size: 7901711835136
> Fixed unaligned/mismatched total_bytes for super block and device items
> 
> # btrfs rescue fix-device-size /dev/sda4
> No device size related problem found
> 
> # btrfs rescue fix-device-size /dev/sdb4
> No device size related problem found
> 
> # mount /home ; umount /home
> 
> # btrfs rescue fix-device-size /dev/sdb4
> parent transid verify failed on 265344253952 wanted 42646 found 46119
> parent transid verify failed on 265344253952 wanted 42646 found 46119
> parent transid verify failed on 265344253952 wanted 42646 found 46119
> Ignoring transid failure
> Fixed super total bytes, old size: 7901711842304 new size: 7901711835136
> Fixed unaligned/mismatched total_bytes for super block and device items
> 
> # mount /home
> 
> 
> 
> Tomasz Chmielewski
> https://lxadm.com