X-Spam-Check-By:	sourceware.org
Message-ID:	<ba40711f0606292036q1a5e5e0dw37349a19247ef97c@mail.gmail.com>
Date:	Thu, 29 Jun 2006 23:36:41 -0400
From:	"Lev Bishop" <lev DOT bishop AT gmail DOT com>
To:	cygwin AT cygwin DOT com
Subject:	Re: rsync over ssh hang issue understood
In-Reply-To:	<20060630013916.GA5859@trixie.casa.cgf.cx>
MIME-Version:	1.0
References:	<44A348D1 DOT 6070908 AT netbauds DOT net> <44A4666A DOT 6020108 AT netbauds DOT net> <20060630013916 DOT GA5859 AT trixie DOT casa DOT cgf DOT cx>
Mailing-List:	contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Unsubscribe:	<mailto:cygwin-unsubscribe-archive-cygwin=delorie DOT com AT cygwin DOT com>
List-Subscribe:	<mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive:	<http://sourceware.org/ml/cygwin/>
List-Post:	<mailto:cygwin AT cygwin DOT com>
List-Help:	<mailto:cygwin-help AT cygwin DOT com>, <http://sourceware.org/ml/#faqs>
Sender:	cygwin-owner AT cygwin DOT com
Mail-Followup-To:	cygwin AT cygwin DOT com
Delivered-To:	mailing list cygwin AT cygwin DOT com

On 6/29/06, Christopher Faylor wrote:

> For the record, I'm not wild about scrapping the existing (but currently
> turned off) code in cygwin that is supposed to fix this.  Using the NT
> api was supposed to allow us to do what we wanted with no half-measures.
> I'd rather see someone finish that, or at least prove that it doesn't
> work, before scrapping it and move on to something else.

I have a cunning idea (probably too cunning) to make the current code
work and I will hopefully be able to submit a short patch in a day or
two.

> The idea of using threads for pipe writing has been bounced around for a
> long time.  It doesn't solve the select problem if there are multiple
> processes writing to one pipe.  That is not a completely unusual event,
> unfortunately.

Could you be more specific on how it doesn't solve the select problem
in when there are multiple processes writing on the pipe? As far as I
can tell, if (and its a big if) we can build something with threads
that works for a single process, it should work just as well for
multiple processes. Can you give an example sequence of writes and
selects that illustrates the problem? (Not that I think the thread
approach is without problems, I just can't see this one).

Lev

--
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple
Problem reports:       http://cygwin.com/problems.html
Documentation:         http://cygwin.com/docs.html
FAQ:                   http://cygwin.com/faq/

- Raw text -