http://bugzilla.kernel.org/show_bug.cgi?id=13830
--- Comment #10 from ykzhao <yakui.z...@intel.com> 2009-09-29 05:51:13 ---
Hi, Neil
thanks for so quick response.
From the test it seems that this issue is related with CPU deep C-state.
When the box is booted with the boot option of "acpi=ht/off", the acpi is
disabled and C-state won't be used. In such case the ethernet can work well.
At the same time when the system is booted with
"nolapic_timer"/"processor.max_cstate=1", the ethernet also can work well.
So please add the boot option of "nolapic_timer" on your box.
Another issue is that the latency exiting from deep C-state is too big. In such
case maybe the some ethernet packets will be lost. So it will be better that
the 8139 ethernet driver updates pm_qos requirement.
And this bug will be re-assigned to ethernet driver.
Thanks.
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