On 8/9/23 7:08 AM, Chuck Lever wrote:
> From: Chuck Lever <chuck.lever@xxxxxxxxxx>
>
> Even after commit 9f87fc4d72f5 ("block: queue data commands from the
> flush state machine at the head"), I'm still seeing hangs on NFS
> exports that reside on SATA devices.
>
> Bisected to commit 615939a2ae73 ("blk-mq: defer to the normal
> submission path for post-flush requests"). I've tested reverting
> that commit on several kernels from 0aa69d53ac7c ("Merge tag
> 'for-6.5/io_uring-2023-06-23' of git://git.kernel.dk/linux") to
> v6.5-rc5, and it seems to address the problem.
>
> I also confirmed that commit 9f87fc4d72f5 ("block: queue data
> commands from the flush state machine at the head") is still
> necessary.
Adding the author - Christoph?
--
Jens Axboe
