Re: Filesystem lockup with CONFIG_PREEMPT_RT

[Jan de Kruyf <jan.de.kruyf@gmail.com>]

Thank you Austin,

One of these days we will have Kernel Day to see what gives with
Thomas's new patches.
In the mean time I get 45usec max latency under heavy disk io with the
3.2 kernel on some cheap 5 years old Foxconn board (1600Meg duo core)
and no midnight surprises, so I am smiling. It averages between 3 and
4 usec.

When did you post that module? I did not spot it going through the
discussion on rt-users.

cheers,

j.


On Mon, Jul 7, 2014 at 6:23 PM, Austin Schuh <austin@peloton-tech.com> wrote:
> On Mon, Jul 7, 2014 at 1:48 AM, Jan de Kruyf <jan.de.kruyf@gmail.com> wrote:
>> does not give the same problem that I experienced with XFS.
>> So there is a hickup between version 3.2-rt and 3.10-rt I would say.
>
> I posted a simple kernel module that reliably triggers the lockup by
> recreating the circumstances in a controlled manner.  Try testing with
> that module.
>
> Austin