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Date: Thu, 7 Jun 2007 21:16:51 -0700 From: "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com> To: Steven Rostedt <rostedt@...dmis.org> Cc: john stultz <johnstul@...ibm.com>, Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>, Oleg Nesterov <oleg@...sign.ru>, LKML <linux-kernel@...r.kernel.org>, Dipankar Sarma <dipankar@...ibm.com>, RT <linux-rt-users@...r.kernel.org> Subject: Re: [PATCH RT] convert RCU Preempt tasklet into softirq. On Thu, Jun 07, 2007 at 04:16:09PM -0400, Steven Rostedt wrote: > On Thu, 2007-06-07 at 14:51 -0400, Steven Rostedt wrote: > > > There might still be an issue here. With the patch I'm getting a really > > slow response time on networking. But that be because of other patches I > > have applied. > > I removed this patch and I can still get the network slowdown/hang. So > this patch is unrelated to this issue. RCU on the otherhand has not been > cleared of suspicion. Might the slowdown be due to different kernel threads running at different priorities? I could easily believe that changing the priority of the kernel thread processing RCU callbacks could have a noticeable effect on performance in some cases. In other news, passed a set of kernbenches at this end, so starting an rcutorture. Thanx, Paul - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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