> Hi, there are some previous works about this issue, reset PCI devices
> in kdump kernel to stop ongoing DMA:
>
> [v7,0/5] Reset PCIe devices to address DMA problem on kdump with iommu
> https://lore.kernel.org/patchwork/cover/343767/
>
> [v2] PCI: Reset PCIe devices to stop ongoing DMA
>
From: Dave Young
[ Upstream commit af164898482817a1d487964b68f3c21bae7a1beb ]
Michael Weiser reported that he got this error during a kexec rebooting:
esrt: Unsupported ESRT version 2904149718861218184.
The ESRT memory stays in EFI boot services data, and it was reserved
in kernel via
From: Dave Young
[ Upstream commit af164898482817a1d487964b68f3c21bae7a1beb ]
Michael Weiser reported that he got this error during a kexec rebooting:
esrt: Unsupported ESRT version 2904149718861218184.
The ESRT memory stays in EFI boot services data, and it was reserved
in kernel via
From: Dave Young
[ Upstream commit af164898482817a1d487964b68f3c21bae7a1beb ]
Michael Weiser reported that he got this error during a kexec rebooting:
esrt: Unsupported ESRT version 2904149718861218184.
The ESRT memory stays in EFI boot services data, and it was reserved
in kernel via
On 01/10/20 at 08:45pm, Khalid Aziz wrote:
> >> - if (kexec_in_progress && (pci_dev->current_state <= PCI_D3hot))
> >> + if ((kexec_in_progress || is_kdump_kernel()) &&
> >> + pci_dev->current_state <= PCI_D3hot)
> >>
On Sat, Jan 11, 2020 at 11:46 AM Khalid Aziz wrote:
>
> On 1/10/20 5:50 PM, Baoquan He wrote:
> > On 01/10/20 at 05:18pm, Khalid Aziz wrote:
> >> On 1/10/20 4:00 PM, Jerry Hoemann wrote:
> >>> On Fri, Jan 10, 2020 at 03:25:36PM -0700, Khalid Aziz and Shuah Khan
> >>> wrote:
> On 1/10/20
On Sat, Jan 11, 2020 at 8:45 AM Baoquan He wrote:
> On 01/10/20 at 04:00pm, Jerry Hoemann wrote:
> > > I am not understanding this failure mode either. That code in
> > > pci_device_shutdown() was added originally to address this very issue.
> > > The patch 4fc9bbf98fd6 ("PCI: Disable Bus Master
On Sat, Jan 11, 2020 at 5:42 AM Bjorn Helgaas wrote:
>
> Can you help me understand the sequence of events? If I understand
> correctly, the desired sequence is:
>
> - user kernel boots
> - user kernel panics and kexecs to kdump kernel
One thing imported need to be mentioned here, user
