Re: [PATCH v2] dm: Preserve the order of REQ_PREFLUSH writes

[Bart Van Assche]

On 9/10/25 11:01 PM, Hannes Reinecke wrote:

Hmm. But if additional writes can sneak in between sending the empty
flush and the original write bio, why does that happen only for targets
with one device?
IOW: Doesn't this reordering also happen for targets with several
devices?

Hi Hannes,

Yes, the write reordering for REQ_PREFLUSH bios that I mentioned in the
patch description can happen with any number of target devices.

I'm not sure whether the reordering can be fixed if num_targets > 1.

Thanks,

Bart.