Re: XFS and RAID10 with o2 layout

["Siniša Bandin" <sinisa@4net.rs>]

On 14.12.2018 21:44, John Stoffel wrote:
>>>>>> "Wols" == Wols Lists <antlists@youngman.org.uk> writes:
> 
> Wols> On 14/12/18 07:03, Sinisa wrote:
>>>> And another MD flush thread waiting on a MD sync barrier.
>>>> 
>>>> Basically, this looks and smells like a MD sync barrier race
>>>> condition, not an XFs problem.
>>>> 
>>>> Cheers,
>>>> 
>>>> Dave.
>>> 
>>> But why don't we see the same issue with other filesystems?
> 
> Wols> Possibly because, iirc, xfs is aware of the underlying raid?
> 
> I don't think it's that in touch with the raid.  It can/does query for
> settings so it can optimize stuff, but I don't think it actually uses
> it other than as a block device.
> 
> Wols> I don't know, but I seem to remember that from earlier 
> discussions about
> Wols> "xfs over mdraid".
> 
> Have you tried doing this with the absolute latest kernel?

Well, not "absolute" but relative :)

Absolute latest being 4.20-rc6, I have tried with 4.20-rc2 or -rc3


-- 
Srdačan pozdrav/Best regards,
Siniša Bandin