On Fri, 14 Jul 2023 16:30:14 +0200, Christoph Hellwig wrote:
> We used to insert the data commands following a pre-flush to the head
> of the queue until commit 1e82fadfc6b ("blk-mq: do not do head insertions
> post-pre-flush commands"). Not doing this seems to cause hangs of
> such commands on NFS workloads when exported from file systems with
> SATA SSDs. I have no idea why this would starve these workloads,
> but doing a semantic revert of this patch (which looks quite different
> due to various other changes) fixes the hangs.
>
> [...]
Applied, thanks!
[1/1] block: queue data commands from the flush state machine at the head
commit: 9f87fc4d72f52b26ac3e19df5e4584227fe6740c
Best regards,
--
Jens Axboe
