On 07/12/2017 07:56 PM, Bjorn Helgaas wrote:
On Fri, Apr 07, 2017 at 04:32:18PM +0200, Joerg Roedel wrote:From: Joerg Roedel <jroedel@xxxxxxx> ATS is broken on this hardware and causes IOMMU stalls and system failure. Disable ATS on these devices to make them usable again with IOMMU enabled. Note that the commit in the Fixes-tag is not buggy, it just uncovers the problem in the hardware by increasing the ATS-flush rate. Fixes: b1516a14657a ('iommu/amd: Implement flush queue') Signed-off-by: Joerg Roedel <jroedel@xxxxxxx>Applied with Alex's ack to pci/virtualization for v4.14, thanks!
Is there any chance of getting this into an earlier kernel? This is a pretty devastating bug for users! I'm currently providing patched kernels, but if they run upgrades and get a new kernel without noticing it, any filesystem they access will get completely mangled.
