Re: Slow I/O on USB media after commit f664a3cc17b7d0a2bc3b3ab96181e1029b0ec0e6

[Andrea Vai]

Il giorno lun, 25/11/2019 alle 23.15 +0800, Ming Lei ha scritto:
> On Mon, Nov 25, 2019 at 03:58:34PM +0100, Andrea Vai wrote:
> 
> [...]
> 
> > What to try next?
> 
> 1) cat /sys/kernel/debug/block/$DISK/hctx0/flags
result:

alloc_policy=FIFO SHOULD_MERGE|2

> 
> 
> 2) echo 128 > /sys/block/$DISK/queue/nr_requests and run your copy
> 1GB
> test again.

done, and still fails. What to try next?

Thanks,
Andrea