Re: [PATCH v2 2/2] vhost-user: add a request-reply lock

[Peter Xu <peterx@redhat.com>]

On Thu, Aug 29, 2024 at 11:05:15AM -0400, Michael S. Tsirkin wrote:
> > Personally I still prefer we look into why a separate mutex won't work and
> > why that timed out; that could be part of whoever is going to investigate
> > the whole issue (including the hang later on). Otherwise I'm ok from
> > migration pov that we take bql in the vhost-user hook, but not in savevm.c.
> 
> ok

Just something as a heads-up comment in case someone might keep looking
into the hang problem: I'm not sure whether the brew build failure on the
test case is relevant to the hang issue we observed, or even it is the hang
issue itself - if the failure is about a timeout that one qemu hanged.

IOW, whoever cannot reproduce the hang might leverage the mutex patch to
reproduce, if we want to figure out the last missing piece of the puzzle..

Thanks,

-- 
Peter Xu