Re: [PATCH v3] drivers: hv: vmbus: Use kthread for vmbus interrupts on PREEMPT_RT

Sebastian Andrzej Siewior <[email protected]> Wed, 18 Mar 2026 12:21:13 +0100

Newsgroups	org.kernel.vger.linux-rt-users,org.kernel.vger.linux-hyperv,org.kernel.vger.linux-kernel
Message-ID	<[email protected]>

On 2026-03-18 12:03:03 [+0100], Jan Kiszka wrote:
> > Either way, that add_interrupt_randomness() should be moved to
> > sysvec_hyperv_callback() like it has been done for
> > sysvec_hyperv_stimer0(). It should be invoked twice now if gets there
> > via vmbus_percpu_isr().
> 
> No, this would degrade arm64.

Okay. So why does this needs to be done for _this_ per-CPU IRQ on ARM64
but not for the others? What does it make so special.

> Jan

Sebastian