On 2024/10/10 21:25, Liang, Kan wrote:
On 2024-10-10 6:10 a.m., Jinpu Wang wrote:
Hi Greg,
On Thu, Oct 10, 2024 at 11:31 AM Greg KH<gregkh@xxxxxxxxxxxxxxxxxxx> wrote:
On Thu, Oct 10, 2024 at 11:13:42AM +0200, Jinpu Wang wrote:
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.
Ok, that implies that we need to add some other patch to 6.1.y, OR we
can revert it from 6.1.y. Let me know what you think is the better
thing to do.
I think better to revert both:
8c91a4bfc7f8 ("iommu: Fix compilation without CONFIG_IOMMU_INTEL")
I'm not sure about this one. May need baolu's comments.
I can't find this commit in the mainline kernel. I guess it fixes a
compilation issue in the stable tree? If so, it depends on whether the
issue is still there.
Thanks,
baolu
