Hi Greg,
On Thu, Oct 10, 2024 at 11:07 AM Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx> 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@xxxxxxxxxxxxxxx/T/)
> >
> > 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
