X-Recipient:	archive-cygwin AT delorie DOT com
X-Spam-Check-By:	sourceware.org
Date:	Fri, 11 Mar 2011 15:23:57 +0100
From:	Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To:	cygwin AT cygwin DOT com
Subject:	Re: ld: fatal error - cmalloc would have returned NULL
Message-ID:	<20110311142357.GI7064@calimero.vinschen.de>
Reply-To:	cygwin AT cygwin DOT com
Mail-Followup-To:	cygwin AT cygwin DOT com
References:	<4D7A2951 DOT 1030002 AT emrich-ebersheim DOT de> <20110311141317 DOT GH7064 AT calimero DOT vinschen DOT de>
MIME-Version:	1.0
In-Reply-To:	<20110311141317.GH7064@calimero.vinschen.de>
User-Agent:	Mutt/1.5.21 (2010-09-15)
Mailing-List:	contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Id:	<cygwin.cygwin.com>
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 Mar 11 15:13, Corinna Vinschen wrote:
> On Mar 11 14:53, Rainer Emrich wrote:
> > I have to be more clear. I increased the heap_chunk_in_mb to 1792 using:
> > regtool -i set /HKLM/Software/Cygwin/heap_chunk_in_mb 1792
> 
> But that's the size of the application heap, not the size of the
> cygheap.  The cygheap is used by a couple of internal datastructures
> of the cygwin DLL itself, while the application heap is used for malloc.
> 
> So you raised the size of the application heap, probably not to 1792
> Megs, but the next lower allocation possible (cygwin decrements the size
> in 1MB steps until the allocation succeeds.
> 
> That's weird.  malloc uses mmap, but only for allocations beyond 128K.

Actually mmap is only used if you try to malloc >= 256K.

> Since ld only allocates 64K chunks, it doesn't look like mmap is called
> from malloc.  OTOH, if raising the heap size helps, how do the
> zillions of mmap calls into this picture?!?

Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Project Co-Leader          cygwin AT cygwin DOT com
Red Hat

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

- Raw text -