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DateTue, 24 Jan 2006 09:01:57 +0100
FromIngo Molnar <>
SubjectRe: RCU latency regression in 2.6.16-rc1
* Lee Revell <rlrevell@joe-job.com> wrote:

> On Tue, 2006-01-24 at 08:56 +0100, Ingo Molnar wrote:
> > * Lee Revell <rlrevell@joe-job.com> wrote:
> > 
> > > I ported the latency tracer to 2.6.16 and got this 13ms latency within 
> > > a few hours.  This is a regression from 2.6.15.
> > > 
> > > It appears that RCU can invoke ipv4_dst_destroy thousands of times in 
> > > a single batch.
> > 
> > could you try the PREEMPT_RCU patch below?
> 
> Sure.  If it works do you see this making it in 2.6.16?  Otherwise we 
> still would have a regression...

nope, that likely wont make v2.6.16, which is frozen already.

	Ingo
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