[Samba] io_uring cause data corruption

[A L]

On 2020-04-26 19:46, Jeremy Allison via samba wrote:
> On Sun, Apr 26, 2020 at 11:51:42AM +0200, A L via samba wrote:
>> * Connected from a Windows 10 computer over 1G ethernet. * Copy data 
>> using Windows Explorer and FastCopy(1) from the Samba share to a 
>> local disk. * Verify the sha-256 sum on the files. From what I can 
>> see there is data corruption on many of the files. Sha-256 does not 
>> match. I copied the same files many times and the data corruption 
>> occurs within minutes. The total data set is about 800GB. 
> Can you do checksums on file fragments so we can discover at what 
> offset (if non-zero) the corruption occurs.
Yes, I will check this.

I saw a patch on the kernel mailing list about possible corruptions in 
during re-scheduling. I wonder if this is the problem I am hitting. I'll 
make some more tests with this patch.
https://www.spinics.net/lists/io-uring/msg01706.html

Regards,
Anders