Re: [Qemu-devel] qemu_futex_wait() lockups in ARM64: 2 possible issues

[Paolo Bonzini]

On 11/10/19 08:05, Jan Glauber wrote:
> On Wed, Oct 09, 2019 at 11:15:04AM +0200, Paolo Bonzini wrote:
>>> ...but if I bump notify_me size to uint64_t the issue goes away.
>>
>> Ouch. :)  Is this with or without my patch(es)?

You didn't answer this question.

>> Also, what if you just add a dummy uint32_t after notify_me?
> 
> With the dummy the testcase also runs fine for 500 iterations.

You might be lucky and causing list_lock to be in another cache line.
What if you add __attribute__((aligned(16)) to notify_me (and keep the
dummy)?

Paolo

> Dann, can you try if this works on the Hi1620 too?