Am 04.11.2015 um 21:14 schrieb Stefan Beller:
On Wed, Nov 4, 2015 at 10:14 AM, Junio C Hamano <gitster@xxxxxxxxx> wrote:
Imagine that we are running two things A and B at the same time. We
ask poll(2) and it says both A and B have some data ready to be
read, and we try to read from A. strbuf_read_once() would try to
read up to 8K, relying on the fact that you earlier set the IO to be
nonblock. It will get stuck reading from A without allowing output
from B to drain. B's write may get stuck because we are not reading
from it, and would cause B to stop making progress.
What if the other sides of the connection from A and B are talking
with each other,
I am not sure if we want to allow this ever. How would that work with
jobs==1? How do we guarantee to have A and B running at the same time?
I think that a scenario where A and B are communicating is rather
far-fetched. We are talking about parallelizing independent tasks. I
would not worry.
-- Hannes
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