FIX: Applications become unreliable after inserting CD-ROM (840942)


The information in this article applies to:

  • Microsoft Windows CE .NET 4.2

SYMPTOMS

When a CD-ROM disc that contains many files and directories is inserted into a Microsoft Windows CE platform, the Universal Disc File System (UDFS) driver may allocate large buffers. Sometimes, these buffers can grow to consume sufficient memory to affect other applications.

RESOLUTION

Software update information

A supported software update is now available from Microsoft as Windows CE 4.2 Core OS QFE 840942. To resolve this problem immediately, click the following article number for information about obtaining Windows CE Platform Builder and core operating system software updates:

837392 How to locate core operating system fixes for Microsoft Windows CE Platform Builder products

Prerequisites

This update is supported only if all previously issued updates for this product have also been installed.

Restart requirement

After you install this update, you must perform a clean build of the whole platform. To clean the platform, click Clean on the Build menu. To build the platform, click Build Platform on the Build menu. You do not have to restart your computer after you apply this update.

Update replacement information

This update does not replace any other updates.

File information

The English version of this software update has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel. 
   Date         Time   Version  Size     File name
   -----------------------------------------------------------------------------
   22-May-2004  01:04  4.21     703,224  Wincepb42-040521-kb840942-armv4.exe  
   22-May-2004  01:04  4.21     703,224  Wincepb42-040521-kb840942-armv4i.exe  
   22-May-2004  01:04  4.21     711,416  Wincepb42-040521-kb840942-mipsii.exe  
   22-May-2004  01:04  4.21     711,416  Wincepb42-040521-kb840942-mipsii_fp.exe
   22-May-2004  01:04  4.21     711,416  Wincepb42-040521-kb840942-mipsiv.exe
   22-May-2004  01:04  4.21     711,416  Wincepb42-040521-kb840942-mipsiv_fp.exe  
   22-May-2004  01:04  4.21     695,032  Wincepb42-040521-kb840942-sh3.exe
   22-May-2004  01:04  4.21     695,032  Wincepb42-040521-kb840942-sh4.exe
   22-May-2004  01:04  4.21     682,744  Wincepb42-040521-kb840942-x86.exe
The English version of this software update has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel. 
   Date         Time   Size     File name
   ------------------------------------------

   Path: Public\Common\Oak\Lib\Armv4\Debug
   15-May-2004  00:28  359,674  Udfs.lib
   15-May-2004  00:28   94,208  Udfs.pdb

   Path: Public\Common\Oak\Lib\Armv4\Retail
   15-May-2004  00:28  270,880  Udfs.lib
   15-May-2004  00:28   94,208  Udfs.pdb

   Path: Public\Common\Oak\Lib\Armv4i\Debug
   15-May-2004  00:29  360,198  Udfs.lib
   15-May-2004  00:29   94,208  Udfs.pdb

   Path: Public\Common\Oak\Lib\Armv4i\Retail
   15-May-2004  00:29  271,210  Udfs.lib
   15-May-2004  00:29   94,208  Udfs.pdb

   Path: Public\Common\Oak\Lib\Mipsii\Debug
   15-May-2004  00:29  362,222  Udfs.lib
   15-May-2004  00:29   94,208  Udfs.pdb

   Path: Public\Common\Oak\Lib\Mipsii\Retail
   15-May-2004  00:29  278,384  Udfs.lib
   15-May-2004  00:29   94,208  Udfs.pdb

   Path: Public\Common\Oak\Lib\Mipsii_fp\Debug
   15-May-2004  00:29  362,306  Udfs.lib
   15-May-2004  00:29   94,208  Udfs.pdb

   Path: Public\Common\Oak\Lib\Mipsii_fp\Retail
   15-May-2004  00:29  278,530  Udfs.lib
   15-May-2004  00:29   94,208  Udfs.pdb

   Path: Public\Common\Oak\Lib\Mipsiv\Debug
   15-May-2004  00:29  365,580  Udfs.lib
   15-May-2004  00:29   94,208  Udfs.pdb

   Path: Public\Common\Oak\Lib\Mipsiv\Retail
   15-May-2004  00:29  280,382  Udfs.lib
   15-May-2004  00:29   94,208  Udfs.pdb

   Path: Public\Common\Oak\Lib\Mipsiv_fp\Debug
   15-May-2004  00:30  365,666  Udfs.lib
   15-May-2004  00:30   94,208  Udfs.pdb

   Path: Public\Common\Oak\Lib\Mipsiv_fp\Retail
   15-May-2004  00:30  280,530  Udfs.lib
   15-May-2004  00:30   94,208  Udfs.pdb

   Path: Public\Common\Oak\Lib\Sh3\Debug
   15-May-2004  00:30  341,084  Udfs.lib
   15-May-2004  00:30   94,208  Udfs.pdb

   Path: Public\Common\Oak\Lib\Sh3\Retail
   15-May-2004  00:30  263,702  Udfs.lib
   15-May-2004  00:30   94,208  Udfs.pdb

   Path: Public\Common\Oak\Lib\Sh4\Debug
   15-May-2004  00:30  341,084  Udfs.lib
   15-May-2004  00:30   94,208  Udfs.pdb

   Path: Public\Common\Oak\Lib\Sh4\Retail
   15-May-2004  00:30  263,598  Udfs.lib
   15-May-2004  00:30   94,208  Udfs.pdb

   Path: Public\Common\Oak\Lib\X86\Debug
   15-May-2004  00:28  322,260  Udfs.lib
   15-May-2004  00:28   94,208  Udfs.pdb

   Path: Public\Common\Oak\Lib\X86\Retail
   15-May-2004  00:28  245,202  Udfs.lib
   15-May-2004  00:28   94,208  Udfs.pdb

STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

MORE INFORMATION

This software update changes the heap allocation code within UDFS. You can now limit the heap size, and the heap can be deallocated upon media removal. By default, these changes are not active. To enable and to configure this software update, you must add the following registry keys to the OEM platform:
  • [HKEY_LOCAL_MACHINE\System\StorageManager\UDFS]
  • "HeapMaxSize"=dword:<MaximumHeapSize>
  • "DestroyHeapOnUnmount"=dword:<Enabled>
Note In these registry keys, <MaximumHeapSize> is the maximum heap size that you want, in kilobytes. A value of 0 means that the heap is unbounded. <Enabled> is set to 1 to enable the destruction and recreation of the whole heap when media change occurs.
Modification Type:MinorLast Reviewed:5/27/2005
Keywords:kbBug kbfix kbQFE KB840942
©2004 Microsoft Corporation. All rights reserved.