Hi Greg,
On Thu, Oct 10, 2024 at 11:07 AM Greg KH gregkh@linuxfoundation.org wrote:
On Thu, Oct 10, 2024 at 09:31:37AM +0200, Jinpu Wang wrote:
Hello all,
We are experiencing a boot hang issue when booting kernel version 6.1.83+ on a Dell Inc. PowerEdge R770 equipped with an Intel Xeon 6710E processor. After extensive testing and use of `git bisect`, we have traced the issue to commit:
`586e19c88a0c ("iommu/vt-d: Retrieve IOMMU perfmon capability information")`
This commit appears to be part of a larger patchset, which can be found here: [Patchset on lore.kernel.org](https://lore.kernel.org/lkml/7c4b3e4e-1c5d-04f1-1891-84f686c94736@linux.inte...)
We attempted to boot with the `intel_iommu=off` option, but the system hangs in the same manner. However, the system boots successfully after disabling `CONFIG_INTEL_IOMMU_PERF_EVENTS`.
Is there any error messages? Does the latest 6.6.y tree work properly? If so, why not just use that, no new hardware should be using older kernel trees anyway :)
No error, just hang, I've removed "quiet" and added "debug". Yes, the latest 6.6.y tree works for this, but there are other problems/dependency we have to solve.
thanks,
Thanks!
greg k-h