From: Justin Piszcz <jpiszcz@lucidpixels.com>
To: linux-kernel@vger.kernel.org
Cc: Alan Piszcz <ap@solarrain.com>
Subject: 2.6.35: cpu_idle bug report / on i7 870 cpu (x86_64)
Date: Fri, 6 Aug 2010 18:09:54 -0400 (EDT) [thread overview]
Message-ID: <alpine.DEB.2.00.1008061800530.5241@p34.internal.lan> (raw)
Hi,
When cpu_idle is used alongside a core i7 cpu w/cpufreq, the system
exhibits delays when typing into a terminal via ssh or VNC, I had changed
a few options from 2.6.34 -> 2.6.35 and did not think the cpu_idle would
be at fault; however, after going through all of the options and disabling
it, the problem went away.
< > Cpuidle Driver for Intel Processors
The system lags every so often when cpu_idle is enabled. It is quite
annoying.
All disk subsystems/CPU/etc are OK-- that option causes some nasty side
effects.
Kernel config: (w/cpu_idle) - exhibits the problem.
http://home.comcast.net/~jpiszcz/20100806/config-20100806.1281129405
Removed cpu_idle, problem is gone.
http://home.comcast.net/~jpiszcz/20100806/config-20100806.1281131518
In addition, sometimes the system did not reboot (instead I hear the
speaker whining solid, not beeping, just a constant whine).
And sometimes it failed to reboot between kernel rebuilds.
After cpu_idle has been removed from the kernel, all problems have went
away.
This may have already been reported but I did not find anything on it.
Is this driver safe for i7 CPUs and/or who should be using it?
Justin.
reply other threads:[~2010-08-06 22:09 UTC|newest]
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