bug#48118: 27.1; 28; Only first process receives output with multiple running processes

[Daniel Mendler]

On 4/30/21 4:26 PM, Eli Zaretskii wrote:
>> Date: Fri, 30 Apr 2021 17:17:58 +0300
>> From: Eli Zaretskii <eliz@gnu.org>
>> Cc: 48118@debbugs.gnu.org
>>
>> Why can't you call stop-process from your sentinel function(s) to
>> avoid the problem?
> 
> Sorry, I meant filter functions, of course.

So you say I should repeatedly stop the current process in the filter
function in order to allow the other process to take precedence, since
the underlying Emacs handling of asynchronous processes is unable to
read from two processes at once? This does not sound like a good
solution to me. What is preventing Emacs from treating multiple
processes fairly?