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From:	Barry Buchbinder <BBUCHBINDER AT niaid DOT nih DOT gov>
To:	"Cygwin (E-mail)" <cygwin AT sourceware DOT cygnus DOT com>
Subject:	RE: Windows expertise needed: what are MinSPs
Date:	Thu, 1 Mar 2001 10:07:14 -0500
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See also http://support.microsoft.com/support/kb/articles/Q149/0/83.asp

- Barry Buchbinder

> -----Original Message-----
> From: David A. Cobb [mailto:superbiskit AT home DOT com]
> Sent: Thursday, March 01, 2001 1:23 AM
> To: Cygwin General MailList
> Subject: Windows expertise needed: what are MinSPs
>
> Working in Xemacs-i686-pc-Cygwin-21.1.13 and a [virtual] host
> of Cygwin
> tools, when up popped the devil - BSOD - and said:
>     Stack Frames nearly exhausted, try increasing MinSPs in
> SYSTEM.INI,
>     MinSPs = 4
>
> So, first thing today I tried launching Cygwin and the whole
> darn system
> just stalled.  After 3 or 4 reboots, I added
> SYSTEM.INI [386enh] MinSPs=8
>
> Not only did I get up and running, things seemed to start a
> bit quicker.
>
> NOW, what have I done?   Maybe a bigger number would be even better?
> Maybe we all should boink it up a notch?

You're running Win95 or Win98 isn't it?

There 32-bit DRIVERS are allocated a default 1-page stack (that is 4kbyte).
If there is a stack overflow, Win98 will look in a pool of Spare Stack pages
to grow the driver's stack. It's this set of spare stack pages you are
increasing by setting MinSPs :-)

Note that you must always increase it by 4 (i.e. set it to 8, 12, etc.)
according to Microsoft... Now, why do you have stack overflows in 32-bit
drivers is another history but you should have corrected the problem if you
no more get the same message :-)

HINT: have you installed anything on your computer recently?

HTH

        Bernard
--------------------------------------------
Bernard Dautrevaux 

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