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Date: Wed, 12 Aug 2020 17:34:30 +0300 From: Vladimir Oltean <olteanv@...il.com> To: Sebastian Andrzej Siewior <bigeasy@...utronix.de> Cc: David Miller <davem@...emloft.net>, Jiafei.Pan@....com, kuba@...nel.org, netdev@...r.kernel.org, claudiu.manoil@....com, ioana.ciornei@....com, yangbo.lu@....com, linux-kernel@...r.kernel.org, linux-rt-users@...r.kernel.org Subject: Re: [PATCH net-next 2/2] enetc: use napi_schedule to be compatible with PREEMPT_RT On Wed, Aug 12, 2020 at 03:51:44PM +0200, Sebastian Andrzej Siewior wrote: > On 2020-08-03 18:21:45 [-0700], David Miller wrote: > > From: Vladimir Oltean <olteanv@...il.com> > > > The driver calls napi_schedule_irqoff() from a context where, in RT, > > > hardirqs are not disabled, since the IRQ handler is force-threaded. > … > > > > > > Signed-off-by: Jiafei Pan <Jiafei.Pan@....com> > > > Signed-off-by: Vladimir Oltean <vladimir.oltean@....com> > > > > Applied. > > Could these two patches be forwarded -stable, please? The changelog > describes this as a problem on PREEMPT_RT but this also happens on !RT > with the `threadirqs' commandline switch. > > Sebastian I expect the driver maintainers to have something to say about this. I didn't test on stable kernels, and at least for dpaa2-eth, the change would need to go pretty deep down the stable line. Also, not really sure who is using the threadirqs option except for testing purposes. Thanks, -Vladimir
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