Date: Wed, 5 Aug 92 08:31:24 EDT
From: DJ Delorie <dj AT ctron DOT com>
To: djgpp AT sun DOT soe DOT clarkson DOT edu
Subject: Memory allocation problem with GO32

>I think I've found a pretty serious bug in GO32:
>The PageTest that comes with the dev package aborts
>after having paged about 2700 K with the message
>"Out of conventional memory".  The same thing happens
>with a program compiled under DJGPP 1.05 of mine which
>uses LOTS of memory.  Both worked find under 1.06.  The problem
>shows up consistenly after a program has used up above amount
>of virtual memory.  I tried to track down the problem, and I
>think it must be in the page_out routine -- there's a
>new section for VA_640 paging which wasn't there before,
>I think.  (It sure wasn't there in 1.05.)  The memory the program
>uses up before it crashes is apparently independent on the
>amount of free memory - it's always the same no matter how
>much XMS or Low Memory is occupied.

For 1.07 (or 1.08?) I fixed the VA_640 and VA_1M pageouts so that some
conventional memory is always reserved when you need extended memory.
I was getting the same problems compiling gcc when virtual data space
hit the magic 4096K barrier.

DJ
dj AT ctron DOT com
Life is a banana.