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System shows a high nonpaged pool utilization from pool tag AfdP


View products that this article applies to.

Symptoms

Consider the following scenario:
  • You have a server that is running Windows Server 2012 R2 or Windows Server 2008 R2 Service Pack (SP1).
  • You run a third-party software package on the server.
  • The software package is a multithreaded Winsock server application.

In this scenario, the server stops responding intermittently, and the system shows a high nonpaged pool utilization from pool tag AfdP.

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Cause

This problem occurs because of a nonpaged pool leak in the afd.sys driver. This leak exhausts the nonpaged pool and causes the server to stop responding.

The problem can occur if one application thread posts a Winsock Select function on a set of sockets while a second application thread is deleting one or more of the sockets.

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Resolution

To resolve this issue in Windows Server 2012 R2, install update 2955164. For more information about update 2955164, click the following article number to view the article in the Microsoft Knowledge Base:
2955164 Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 update rollup: May 2014
To resolve this issue in Windows Server 2008 R2, install the hotfix that is described in this article.

Hotfix information

A supported hotfix is available from Microsoft Support. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing the problem described in this article. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, go to the following Microsoft website: Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

Prerequisites

To apply this hotfix, you must have Service Pack 1 for Windows 7 or Windows Server 2008 R2 installed.

Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any previously released hotfix.

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File information
The English (United States) version of this hotfix installs files that have the attributes that are listed in the following tables. The dates and the times for these files are listed in Coordinated Universal Time (UTC). The dates and the times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and the times may change when you perform certain operations on the files.

Windows 7 and Windows Server 2008 R2 file information and notes

Important Windows 7 hotfixes and Windows Server 2008 R2 hotfixes are included in the same packages. However, hotfixes on the Hotfix Request page are listed under both operating systems. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows 7/Windows Server 2008 R2" on the page. Always refer to the "Applies To" section in articles to determine the actual operating system that each hotfix applies to.
  • The files that apply to a specific product, SR_Level (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table.

    VersionProductSR_LevelService branch
    6.1.760  1.18 xxxWindows 7 and Windows Server 2008 R2SP1GDR
    6.1.760
    1.22xxx
    Windows 7 and Windows Server 2008 R2SP1LDR
  • GDR service branches contain only those fixes that are widely released to address widespread, extremely important issues. LDR service branches contain hotfixes in addition to widely released fixes.
  • The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed separately in the "Additional file information for Windows 7 and Windows Server 2008 R2" section. MUM and MANIFEST files, and the associated security catalog (.cat) files, are extremely important to maintain the state of the updated components. The security catalog files, for which the attributes are not listed, are signed with a Microsoft digital signature.
For all supported x86-based versions of Windows 7
File nameFile versionFile sizeDateTimePlatform
Afd.sys6.1.7601.18544338,94429-Jul-201406:18x86
Afd.sys6.1.7601.22753338,94426-Jul-201400:32x86
For all supported x64-based versions of Windows 7 and Windows Server 2008 R2
File nameFile versionFile sizeDateTimePlatform
Afd.sys6.1.7601.18544497,15229-Jul-201406:33x64
Afd.sys6.1.7601.22753496,64026-Jul-201400:44x64
For all supported IA-64-based versions of Windows Server 2008 R2
File nameFile versionFile sizeDateTimePlatform
Afd.sys6.1.7601.185441,115,13629-Jul-201406:00IA-64

Additional file information

Additional file information for Windows 7 and Windows Server 2008 R2

Additional files for all supported x86-based versions of Windows 7
File propertyValue
File nameX86_969a3ca266a92d3021a9d6b32233e640_31bf3856ad364e35_6.1.7601.18544_none_a273d49770d1cf9e.manifest
File versionNot applicable
File size700
Date (UTC)29-Jul-2014
Time (UTC)19:08
PlatformNot applicable
File nameX86_fba70be8e66afbbf99099c22ee08dc56_31bf3856ad364e35_6.1.7601.22753_none_c32b0853487eb66d.manifest
File versionNot applicable
File size700
Date (UTC)29-Jul-2014
Time (UTC)19:08
PlatformNot applicable
File nameX86_microsoft-windows-winsock-core_31bf3856ad364e35_6.1.7601.18544_none_d9cf25f1bcc7a5cf.manifest
File versionNot applicable
File size73,506
Date (UTC)29-Jul-2014
Time (UTC)07:52
PlatformNot applicable
File nameX86_microsoft-windows-winsock-core_31bf3856ad364e35_6.1.7601.22753_none_da4cf46cd5ee455a.manifest
File versionNot applicable
File size73,506
Date (UTC)26-Jul-2014
Time (UTC)02:09
PlatformNot applicable
Additional files for all supported x64-based versions of Windows 7 and Windows Server 2008 R2
File propertyValue
File nameAmd64_8c8f338b7b9d2a8b07402077d801629f_31bf3856ad364e35_6.1.7601.22753_none_b157987d61311316.manifest
File versionNot applicable
File size704
Date (UTC)29-Jul-2014
Time (UTC)19:08
PlatformNot applicable
File nameAmd64_b1425b52d4a223a091e91dc247a31e3f_31bf3856ad364e35_6.1.7601.18544_none_77c40112304cc53c.manifest
File versionNot applicable
File size704
Date (UTC)29-Jul-2014
Time (UTC)19:08
PlatformNot applicable
File nameAmd64_microsoft-windows-winsock-core_31bf3856ad364e35_6.1.7601.18544_none_35edc17575251705.manifest
File versionNot applicable
File size73,510
Date (UTC)29-Jul-2014
Time (UTC)09:28
PlatformNot applicable
File nameAmd64_microsoft-windows-winsock-core_31bf3856ad364e35_6.1.7601.22753_none_366b8ff08e4bb690.manifest
File versionNot applicable
File size73,510
Date (UTC)26-Jul-2014
Time (UTC)02:28
PlatformNot applicable
Additional files for all supported IA-64-based versions of Windows Server 2008 R2
File propertyValue
File nameIa64_be120ebcdac51b5ebe1a24f27cf6be17_31bf3856ad364e35_6.1.7601.18544_none_fa1f5c48b5e0c19a.manifest
File versionNot applicable
File size702
Date (UTC)29-Jul-2014
Time (UTC)11:27
PlatformNot applicable
File nameIa64_microsoft-windows-winsock-core_31bf3856ad364e35_6.1.7601.18544_none_d9d0c9e7bcc5aecb.manifest
File versionNot applicable
File size73,508
Date (UTC)29-Jul-2014
Time (UTC)07:45
PlatformNot applicable

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Status

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

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References

Learn about the terminology that Microsoft uses to describe software updates.

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Keywords: kbautohotfix, kbqfe, kbhotfixserver, kbfix, kbexpertiseinter, kbsurveynew, kbbug, kb

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Article Info
Article ID : 2935389
Revision : 1
Created on : 1/7/2017
Published on : 9/9/2014
Exists online : False
Views : 212