Re: [PATCH 6.6-rt 0/5] net: Backport backlog-NAPI threads to resolve PREEMPT_RT softirq warning in SMP flush

[Clark Williams <clrkwllms@kernel.org>]

On Thu, Oct 22, 2026 at 12:30:22AM +0800, Wen Yang wrote:
> 
> 
> On 10/20/26 02:50, Clark Williams wrote:
> > On Mon, Oct 19, 2026 at 12:40:48PM -0500, Clark Williams wrote:
> > > Meh, 15 patches doesn't suck. I'll try and get to that tonight or
> > > tomorrow and see if we can have both v6.6-rt-next and v6.1-rt-next
> > > soaking.
> > > 
> > > Clark
> > > -- 
> > 
> > Wen,
> > 
> > I was reading back through the threads and the previous series and am
> > confused as to whether your 15-patch series has all the RPS code that's
> > required. I seem to recall Sebastian indicating that the original
> > v6.1-rt patchset needed some extra RPS bits?
> > 
> > Clark
> > 
> 
> Hi Clark,
> 
> Thanks for checking, and sorry for confusion.
> 
> My understanding is that Sebastian's comment referred to the existing
> RT defer_work workaround, which covers deferred freeing but not RPS.
> 
> After rechecking against the upstream code, I haven't found an additional
> RPS prerequisite needed for this series.
> 
> Sebastian, could you please check whether this addresses your earlier
> concern about RPS coverage? I'd appreciate any pointers to prerequisites
> I may have missed.
> 
> Thanks,
> Wen

No worries, my natural state is confusion :)

I've applied your 15 patch series and built/smoke-tested it. I'll wait
for Sebastian to comment and then I'll push what I have up to
v6.1-rt-next.

Clark

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