Hi Massimo

On 08/24/2018 02:29 PM, Massimo Burcheri wrote:

On Wed, 2018-08-22 at 11:42 -0600, Jens Axboe wrote:

quoted

Any chance you can try 4.18 at least?

Of course, I tried the kernel.org sources now, sys-kernel/vanilla-sources-4.18.3 
on Gentoo. The issue is the same.

In the first mail of this thread, you said:
"
Switching all devices to "none" scheduler did not help
"

So this issue should not related with io scheduler.

Would you please share the entire dmesg log or backtrace you got on 4.18.3 ?

Thanks
Jianchao