Re: single aio thread is migrated crazily by scheduler

From: Srikar Dronamraju
Date: Mon Nov 18 2019 - 11:26:49 EST


* Dave Chinner <david@xxxxxxxxxxxxx> [2019-11-16 10:40:05]:

> On Fri, Nov 15, 2019 at 03:08:43PM +0800, Ming Lei wrote:
> > On Fri, Nov 15, 2019 at 03:56:34PM +1100, Dave Chinner wrote:
> > > On Fri, Nov 15, 2019 at 09:08:24AM +0800, Ming Lei wrote:
> > I can reproduce the issue with 4k block size on another RH system, and
> > the login info of that system has been shared to you in RH BZ.
> >
> > 1)
>
> Almost all the fio task migrations are coming from migration/X
> kernel threads. i.e it's the scheduler active balancing that is
> causing the fio thread to bounce around.
>

Can we try with the below patch.

--
Thanks and Regards
Srikar Dronamraju

--->8-----------------------------8<----------------------------------