Messages in this thread | | | Date | Thu, 06 Sep 2012 11:22:32 +0200 | From | Daniel Lezcano <> | Subject | CONFIG_NO_HZ + CONFIG_CPU_IDLE freeze the system (Was Re: [PATCH] acpi : remove power from acpi_processor_cx structure) |
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On 09/06/2012 09:54 AM, Daniel Lezcano wrote: > On 09/05/2012 03:41 PM, Rafael J. Wysocki wrote: >> On Saturday, September 01, 2012, Rafael J. Wysocki wrote: >>> On Friday, August 31, 2012, Daniel Lezcano wrote: >>>> On 07/24/2012 11:06 PM, Konrad Rzeszutek Wilk wrote: >>>>> On Tue, Jul 24, 2012 at 11:12:29PM +0200, Daniel Lezcano wrote: >>>>>> Remove the power field as it is not used. >>>>>> >>>>>> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> >>>>>> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> >>>>> 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. > >> 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 <amwang@redhat.com> 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 <davem@davemloft.net> Signed-off-by: Cong Wang <amwang@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
AFAICS, it has been fixed by commit 072a9c48600409d72aeb0d5b29fbb75861a06631 which is not yet in linux-pm-next.
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 ?
Thanks in advance -- Daniel
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