Re: CONFIG_NO_HZ + CONFIG_CPU_IDLE freeze the system (Was Re: [PATCH] acpi : remove power from acpi_processor_cx structure)
From: Daniel Lezcano <hidden>
Date: 2012-09-06 20:35:52
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lkml, xen-devel
On 09/06/2012 10:04 PM, Rafael J. Wysocki wrote:
On Thursday, September 06, 2012, Daniel Lezcano wrote:quoted
On 09/06/2012 09:54 AM, Daniel Lezcano wrote:quoted
On 09/05/2012 03:41 PM, Rafael J. Wysocki wrote:quoted
On Saturday, September 01, 2012, Rafael J. Wysocki wrote:quoted
On Friday, August 31, 2012, Daniel Lezcano wrote:quoted
On 07/24/2012 11:06 PM, Konrad Rzeszutek Wilk wrote:quoted
On Tue, Jul 24, 2012 at 11:12:29PM +0200, Daniel Lezcano wrote:quoted
Remove the power field as it is not used. Signed-off-by: Daniel Lezcano <redacted> Cc: Konrad Rzeszutek Wilk <redacted>Acked.Hi Rafael, I did not see this patch going in. Is it possible to merge it ?I think so. I'll take care of it when I get back from LinuxCon/Plumbers Conf. (early next week).Applied to the linux-next branch of the linux-pm.git tree as v3.7 material.Thanks Rafael.quoted
Are there any other patches you want me to consider for v3.7?Yes please, I have the per cpu latencies ready to be submitted but I want to do extra testing before. Unfortunately, the linux-pm-next hangs at boot time on my intel dual core (not related to the patchset). I am git bisecting right now.I found the culprit. This is not related to the linux-pm tree but with net-next. The following patch introduced the issue. commit 6bdb7fe31046ac50b47e83c35cd6c6b6160a475d Author: Amerigo Wang [off-list ref] Date: Fri Aug 10 01:24:50 2012 +0000 netpoll: re-enable irq in poll_napi() napi->poll() needs IRQ enabled, so we have to re-enable IRQ before calling it. Cc: David Miller [off-list ref] Signed-off-by: Cong Wang [off-list ref] Signed-off-by: David S. Miller [off-list ref] AFAICS, it has been fixed by commit 072a9c48600409d72aeb0d5b29fbb75861a06631 which is not yet in linux-pm-next.If it is present in the current Linus' tree, you can just pull this one and merge linux-pm-next into it. It should merge without conflicts.
Ok, thanks.
quoted
I fall into this issue because NETCONSOLE is set, disabling it allowed me to go further. Unfortunately I am facing to some random freeze on the system which seems to be related to CONFIG_NO_HZ=y and CONFIG_CPU_IDLE=y. Disabling one of them, make the freezes to disappear. Is it a known issue ?Well, there are systems having problems with this configuration, but they should be exceptional. What system is that?
It is a laptop T61p with a Core 2 Duo T9500. Nothing exceptional I believe. Maybe someone got the same issue ? -- <http://www.linaro.org/> Linaro.org │ Open source software for ARM SoCs Follow Linaro: <http://www.facebook.com/pages/Linaro> Facebook | <http://twitter.com/#!/linaroorg> Twitter | <http://www.linaro.org/linaro-blog/> Blog -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html