X-Spam-Check-By: sourceware.org
Message-ID: <442B14EE.5AEFA518@dessent.net>
Date: Wed, 29 Mar 2006 15:14:54 -0800
From: Brian Dessent <brian AT dessent DOT net>
MIME-Version: 1.0
To: cygwin AT cygwin DOT com
Subject: Re: 20060301 snapshot and later.  sh hangs with very long command line
References: <98A22DD7-2111-489A-9843-E0176048A2BB AT rehley DOT net> <20060313000602 DOT GA19770 AT trixie DOT casa DOT cgf DOT cx>
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-IsSubscribed: yes
Reply-To: cygwin AT cygwin DOT com
Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm
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

Christopher Faylor wrote:

> >I was building binutils using the cygwin 20060308 snapshot, and when
> >it did the check for "finding the maximum length of command line" a
> >sh shell goes to 99% cpu usage and doesn't return until I end the
> >process using task manager.
> >
> >I isolated the portion of the script that was hanging and was able to
> >repeat the problem.  The script hangs when it checks for a command
> >line of length 16384.  This happens every time I run the script, and
> >it is reproducible for me on at least windows 2000 and windows XP.
> >I've attached a test script.
> >
> >The problem doesn't happen with the 20060227 snapshot, but appeared
> >in 20060301 and later versions.  It is present in the 20060309 snapshot.
> 
> Thanks for the test case.  This should be fixed in the next snapshot.

This looks like it has regressed.  I am using CVS HEAD as of yesterday
and have run into the "finding the maximum length of command line
arguments" hang in configure scripts.  Peter's testcase fails too.  As a
workaround I've set cygexec on my mounts which seems to workaround the
issue (and allows larger commandlines anyway.)

Brian

--
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/