[EXT] Re: iMX6/UART imprecise external abort

Uwe Kleine-König u.kleine-koenig at pengutronix.de
Tue Jan 7 22:43:39 PST 2020


On Wed, Jan 08, 2020 at 05:03:18PM +1300, Andre Renaud wrote:
> On Wed, Jan 8, 2020 at 2:43 PM Andy Duan <fugang.duan at nxp.com> wrote:
> > @Andre Renaud,  can you add kernel command line "nosmp" to check the issue ?
> > Suppose one core cannot reproduce the issue.
> We have done this test previously, and 'nosmp' does resolve the issue.

Not surprising as the problem goes away by (only) ensuring that irq
handler and uart user run on the same cpu. Limiting the whole system to
a single CPU is just another way to ensure this same cpu handling.

Best regards

Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | https://www.pengutronix.de/ |

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