Re: [PATCHv2] efi/unaccepted: Fix soft lockups caused by parallel memory acceptance

[Peter Zijlstra]

On Tue, Oct 17, 2023 at 09:42:13AM +0200, Ard Biesheuvel wrote:

> One question I have is whether the sequence
> 
> spin_lock_irqsave(&unaccepted_memory_lock, flags);
> ...
> spin_unlock(&unaccepted_memory_lock);
> arch_accept_memory(phys_start, phys_end);
> spin_lock(&unaccepted_memory_lock);
> ...
> spin_unlock_irqrestore(&unaccepted_memory_lock, flags);
> 
> is considered sound and is supported by all architectures?

Yes.