Re: [PATCH v2 0/2] Reset PCIe devices to address DMA problem on kdump with iommu

2012-10-09 Thread Takao Indoh
(2012/10/10 1:05), Don Dutile wrote: On 10/09/2012 05:03 AM, Takao Indoh wrote: (2012/10/03 22:23), Don Dutile wrote: On 10/02/2012 03:49 AM, Takao Indoh wrote: These patches reset PCIe devices at boot time to address DMA problem on kdump with iommu. When "reset_devices" is specified, a hot re

Re: [PATCH v2 0/2] Reset PCIe devices to address DMA problem on kdump with iommu

2012-10-09 Thread Don Dutile
On 10/09/2012 05:03 AM, Takao Indoh wrote: (2012/10/03 22:23), Don Dutile wrote: On 10/02/2012 03:49 AM, Takao Indoh wrote: These patches reset PCIe devices at boot time to address DMA problem on kdump with iommu. When "reset_devices" is specified, a hot reset is triggered on each PCIe root por

Re: [PATCH v2 0/2] Reset PCIe devices to address DMA problem on kdump with iommu

2012-10-09 Thread Takao Indoh
(2012/10/03 22:23), Don Dutile wrote: On 10/02/2012 03:49 AM, Takao Indoh wrote: These patches reset PCIe devices at boot time to address DMA problem on kdump with iommu. When "reset_devices" is specified, a hot reset is triggered on each PCIe root port and downstream port to reset its downstrea

Re: [PATCH v2 0/2] Reset PCIe devices to address DMA problem on kdump with iommu

2012-10-03 Thread Don Dutile
On 10/02/2012 03:49 AM, Takao Indoh wrote: These patches reset PCIe devices at boot time to address DMA problem on kdump with iommu. When "reset_devices" is specified, a hot reset is triggered on each PCIe root port and downstream port to reset its downstream endpoint. Background: A kdump proble

Re: [PATCH v2 0/2] Reset PCIe devices to address DMA problem on kdump with iommu

2012-10-02 Thread Takao Indoh
(2012/10/03 4:37), Andi Kleen wrote: Takao Indoh writes: These patches reset PCIe devices at boot time to address DMA problem on kdump with iommu. When "reset_devices" is specified, a hot reset is triggered on each PCIe root port and downstream port to reset its downstream endpoint. Great. I

Re: [PATCH v2 0/2] Reset PCIe devices to address DMA problem on kdump with iommu

2012-10-02 Thread Vivek Goyal
On Tue, Oct 02, 2012 at 12:37:44PM -0700, Andi Kleen wrote: > Takao Indoh writes: > > > These patches reset PCIe devices at boot time to address DMA problem on > > kdump with iommu. When "reset_devices" is specified, a hot reset is > > triggered on each PCIe root port and downstream port to reset

Re: [PATCH v2 0/2] Reset PCIe devices to address DMA problem on kdump with iommu

2012-10-02 Thread Andi Kleen
Takao Indoh writes: > These patches reset PCIe devices at boot time to address DMA problem on > kdump with iommu. When "reset_devices" is specified, a hot reset is > triggered on each PCIe root port and downstream port to reset its > downstream endpoint. Great. I've been pondering this for a lon

[PATCH v2 0/2] Reset PCIe devices to address DMA problem on kdump with iommu

2012-10-02 Thread Takao Indoh
These patches reset PCIe devices at boot time to address DMA problem on kdump with iommu. When "reset_devices" is specified, a hot reset is triggered on each PCIe root port and downstream port to reset its downstream endpoint. Background: A kdump problem about DMA has been discussed for a long tim