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Date: Fri, 21 Dec 2001 21:55:23 +0100 (W. Europe Standard Time)
From: Lothar Linhard <lothar AT concept DOT de>
To: Corinna Vinschen <cygwin AT cygwin DOT com>
cc: =?iso-8859-1?Q?Heinz_Br=FCderlin?= <heinz AT concept DOT de>
Subject: Re: 1.1.3: mmap() returns unusable memory segments: segm fault
In-Reply-To: <Pine.WNT.4.33.0112201903550.144-200000@erde.concept.de>
Message-ID: <Pine.WNT.4.33.0112212057520.45-100000@erde.concept.de>
X-X-Sender: lld AT star DOT concept DOT de
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Content-Type: TEXT/PLAIN; charset=iso-8859-1
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Hi Corinna,

please ignore my prev message.  After adding another
500MB swap space on my NT4.0, it worked (don't know
why my old swap settings min=150MB max=500MB weren't
enough for my application that mmaps ~390MB total).

I detected another problem with mmap from real files
(above, I used MAP_ANON) - now I get crashes where
it worked before.  I'll recontact you when I can
be more specific.

For now: Merry Christmas and all the best for
the new Year.

Lothar.

On Thu, 20 Dec 2001, Lothar Linhard wrote:

> Hi Corinna,
>
> With cygwin's mmap.cc I guess, I cannot map more than 197 MB ?!
> Is that correct?
>
> In my application I always call mmap(NULL,size,PROT_RW,...)
> here is what I get:
> mmap segment[0]: 0x202d0000...0x202dffff = 64 kB
> mmap segment[1]: 0x202e0000...0x202effff = 64 kB
> mmap segment[2]: 0x202f0000...0x2030ffff = 128 kB
> mmap segment[3]: 0x20310000...0x2034ffff = 256 kB
> mmap segment[4]: 0x20350000...0x203cffff = 512 kB
> mmap segment[5]: 0x209d0000...0x20acffff = 1024 kB
> mmap segment[6]: 0x20ad0000...0x20ccffff = 2048 kB
> mmap segment[7]: 0x20cd0000...0x210cffff = 4096 kB
> mmap segment[8]: 0x210d0000...0x218cffff = 8192 kB
> mmap segment[9]: 0x218d0000...0x228cffff = 16384 kB
> mmap segment[10]: 0x228d0000...0x248cffff = 32768 kB
> mmap segment[11]: 0x248d0000...0x288cffff = 65536 kB
> mmap segment[12]: 0x288d0000...0x2c8cffff = 65536 kB
>
> Then, when I try to map another 16384 kB or more, I get
> "Permission denied".
>
> I tried cygwin.dll 1.3.4-2 and 1.3.6-6.
> Just in case you don't konw or if you want to comment it.
>
> Lothar.
> ========================================================================
> Lothar Linhard                           |  Tel.:  +49-761-47094-12
> Concept Engineering, Bötzinger Str. 29,  |  Fax.:  +49-761-47094-29
> 79111 Freiburg, Germany.                 |  Email: lothar AT concept DOT de
> ========================================================================
>


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