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Date: Fri, 10 Mar 2017 21:19:07 +0000
From: Eric Wong <e@80x24.org>
To: Jeremy Evans <code@jeremyevans.net>
Cc: unicorn-public@bogomips.org
Subject: Re: [PATCH] Add worker_exec configuration option V2
Message-ID: <20170310211907.GA5022@untitled>
References: <20170308184432.GA35527@jeremyevans.local>
 <20170308200256.GA21719@whir>
 <20170309194119.GD35527@jeremyevans.local>
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Jeremy Evans <code@jeremyevans.net> wrote:
> Here's V2 of the patch, which I think should address all of the issues
> you pointed out.

Thanks.  Pushed to git://80x24.org/unicorn worker_exec I can add
tests, later, or you can.  I also had some FreeBSD test fixes
(which might apply to OpenBSD) on a VM somewhere which I'll Cc:
you on: there was also just SO_KEEPALIVE fix I posted:

  https://bogomips.org/unicorn-public/20170310203431.28067-1-e@80x24.org/raw

>      worker_nr = -1
>      until (worker_nr += 1) == @worker_processes
>        @workers.value?(worker_nr) and next
>        worker = Unicorn::Worker.new(worker_nr)
>        before_fork.call(self, worker)
> -      if pid = fork
> -        @workers[pid] = worker
> -        worker.atfork_parent
> +
> +      pid = if @worker_exec
> +        worker_spawn(worker)
>        else
> -        after_fork_internal
> -        worker_loop(worker)
> -        exit
> +        fork do
> +          after_fork_internal
> +          worker_loop(worker)
> +          exit
> +        end

I prefer to avoid the block with fork.  The block deepens the
stack for the running app, so it can affect GC efficiency.

Can be fixed in a separate patch...