Messages in this thread | | | Date | Tue, 11 Sep 2012 10:43:23 -0400 | From | Vivek Goyal <> | Subject | Re: [RFC][PATCH] Reset PCIe devices to address DMA problem on kdump with iommu |
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On Tue, Sep 11, 2012 at 07:32:35PM +0900, Takao Indoh wrote:
[..] > I'll post new patch which clears bus master bit and resets devices in > second kernel. > > 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.
Can you explain a bit more how the error happens. I still don't think that because of a bug in a platform somewhere we should be introducing a separate command line parameter and not reuse the exisiting one. Also you have not explained what's the bug and how a new parameter will avoid the bug.
Thanks Vivek
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