Re: btrfs corruption issue on Pine64 PinePhone

[Qu Wenruo <quwenruo.btrfs@gmx.com>]

在 2024/8/5 15:25, ellie 写道:
> On 8/5/24 07:39, ellie wrote:
>> Dear kernel list,
>>
>> I'm hoping this is the right place to sent this. But there seems to be
>> a btrfs corruption issue on the Pine64 PinePhone:
>>
>> https://gitlab.com/postmarketOS/pmaports/-/issues/3058
>>
>> The kernel is 6.9.10, I wouldn't know what exact additional patches
>> may be used by postmarketOS (which is based on Alpine). The device is
>> the PinePhone revision 1.2a or newer https://wiki.pine64.org/wiki/
>> PinePhone#Hardware_revisions sadly there doesn't seem to be a way to
>> check in software if it's 1.2a or 1.2b, and I don't remember which it is.
>>
>> This is on an SD Card, so an inherently rather unreliable storage
>> medium. However, I tried two cards from what I believe to be two
>> different vendors, Lexar and SanDisk, and I'm seeing this with both.
>>
>> The PinePhone had various chipset instability issues before, like
>> https://gitlab.com/postmarketOS/pmaports/-/issues/805 which I believe
>> has however been fixed since. I have no idea if that's relevant, I'm
>> just pointing it out. I also don't know if other filesystems, like
>> ext4 that I used before, might have also had corruption and just
>> didn't detect it. Not that I ever noticed anything, but I'm not sure I
>> necessarily ever would have.

In the detailed report in pmOS issue, you mentioned it's a video file.

I'm wondering if all the corruptions you see are from video files,
especially if the video files are all recorded on the file.

If that's the case, it may be related to the IO pattern, especially if
the recording tool is using direct IO and didn't have proper writeback
wait for those direct IO.

Thanks,
Qu

>>
>> Regards,
>>
>> Ellie
>
> I forgot to specify one testing detail: testing this seems to require
> writing a couple of gigabytes to the SD Card. So that's an additional
> difficulty, since I assume doing that too often will simply kill the
> card for real, which limits how quick and often this can be tested.
>
> Regards,
>
> Ellie
>
>