Re: [BUG] Random hard lockup with userspace %ip on 7.0-rc5

Thomas Gleixner
2026-03-25T16:56:30Z

On Wed, Mar 25 2026 at 10:03, Petr Mladek wrote:
> Adding scheduler and NOHZ people into Cc. Hardlockup in userspace with
> interrupts enabled is strange indeed. Plus, there is some nohz-related
> function on stack...

That's a leftover from a previous syscall and ixgbe_poll is from the
most recent soft interrupt handling. Nothing to see here.

> On Tue 2026-03-24 16:32:09, Calvin Owens wrote:
>> Hi all,
>>
>> I hit the below hard lockup while building kernels a couple days ago. I
>> haven't been able to reproduce it again.
>>
>> It's clearly not actually a hard lockup, the NMI fired while %ip was in
>> userspace with irqs enabled:

Yeah. Doesn't make any sense at all. Does not ring any bell.

Thanks,

tglx