[RFC][PATCH] Reset PCIe devices to address DMA problem on kdump with iommu

Takao Indoh indou.takao at jp.fujitsu.com
Tue Sep 18 21:52:43 EDT 2012

(2012/09/15 5:03), Konrad Rzeszutek Wilk wrote:
>> As to the boot parameter to enable this function, you suggested using
>> reset_devices. I found that on a certain platform resetting devices
>> caused PCIe error due to a hardware bug. Therefore I think we need
>> new parameter apart from reset_devices to disable this function on
>> such a machine.
> Wouldn't a DMI quirk be better for this? That way the second kernel
> internally would know not to do this.

That sounds good. I'll try it, thanks.

Takao Indoh

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