[Tarantool-patches] [PATCH 1/1] raft: fix crash in worker fiber

[Alexander V. Tikhonov]

Hi Vlad, I've checked all results in gitlab-ci, and no new degradations
found [1], patch LGTM.

[1] - https://gitlab.com/tarantool/tarantool/-/pipelines/213343120

On Sun, Nov 08, 2020 at 07:04:09PM +0100, Vladislav Shpilevoy wrote:
> > diff --git a/src/box/raft.c b/src/box/raft.c
> > index e1e60ce94..914b0d68f 100644
> > --- a/src/box/raft.c
> > +++ b/src/box/raft.c
> > @@ -682,11 +682,11 @@ raft_worker_f(va_list args)
> >  			raft_worker_handle_broadcast();
> >  			is_idle = false;
> >  		}
> > +		if (is_idle) {
> > +			assert(raft_is_fully_on_disk());
> > +			fiber_yield();
> > +		}
> >  		fiber_sleep(0);
> > -		if (!is_idle)
> > -			continue;
> > -		assert(raft_is_fully_on_disk());
> > -		fiber_yield();
> >  	}
> >  	return 0;
> 
> I changed this part just a little. Because it makes no sense to
> sleep(0) right after a yield. Force pushed to the branch.
> 
> ====================
> @@ -685,8 +685,9 @@ raft_worker_f(va_list args)
>  		if (is_idle) {
>  			assert(raft_is_fully_on_disk());
>  			fiber_yield();
> +		} else {
> +			fiber_sleep(0);
>  		}
> -		fiber_sleep(0);
>  	}
>  	return 0;
>  }