Messages in this thread | | | Date | Mon, 30 Jun 2008 15:15:11 +0200 | From | Ingo Molnar <> | Subject | Re: [PATCH 0/3] sched: newidle and RT wake-buddy fixes |
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* Gregory Haskins <ghaskins@novell.com> wrote:
> Hi Ingo, > The following patches apply to linux-tip/sched/devel and enhance the > performance of the kernel (specifically in PREEMPT_RT, though they do > not regress mainline performance as far as I can tell). They offer > somewhere between 50-100% speedups in netperf performance, depending > on the test.
-tip testing found this boot hang:
Linux version 2.6.26-rc8-tip (mingo@dione) (gcc version 4.2.3) #12917 SMP Mon Jun 30 15:06:32 CEST 2008 [...] CPU 1/1 -> Node 0 CPU: Physical Processor ID: 0 CPU: Processor Core ID: 1 CPU1: AMD Athlon(tm) 64 X2 Dual Core Processor 3800+ stepping 02 Brought up 2 CPUs Total of 2 processors activated (8041.15 BogoMIPS). [ hard hang ]
with this config:
http://redhat.com/~mingo/misc/config-Mon_Jun_30_14_54_19_CEST_2008.bad
full bootlog:
http://redhat.com/~mingo/misc/hang-Mon_Jun_30_14_54_19_CEST_2008.bad
it should continue with this bootup sequence:
calling net_ns_init+0x0/0x1a0 net_namespace: 376 bytes initcall net_ns_init+0x0/0x1a0 returned 0 after 0 msecs calling init_smp_flush+0x0/0x60
i've bisected it down to:
-------------- | commit cc8160c56843201891766660e3816d2e546c1b17 | Author: Gregory Haskins <ghaskins@novell.com> | Date: Fri Jun 27 14:29:50 2008 -0600 | | sched: enable interrupts and drop rq-lock during newidle balancing --------------
so i've reverted that change for now.
Ingo
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