Increase Non-Paged Pool Memory

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- Previous
  - 1
    - DrvTextOut/DrvSendPage part 2 Hi, Earlier I left a post about my printer driver sometimes getting a call to DrvSendPage in the middle of processing a call to DrvTextOut. I was somewhat starting to blame MS-OFFICE applications, but this appears to be just something the spooler does, since I can duplicate this just with a call to EndDocPrinter or EndDoc in my own printing application. The problem is that my driver is in the middle of DrvTextOut and suddenly I see a call to DrvSendPage even though I have not yet returned from DrvTextOut. This may be a clue, but I don't know how to interpret it: When I had "DebugBreak()" as the second line to DrvTextOut (first line is a call to OutputDebugString), it never gets executed, DrvSendPage gets called at that point. I do not have any clue as to why the spooler would do this, or how my driver should handle it. Thanks! Tag: Increase Non-Paged Pool Memory Tag: 64116
  - 2
    - Kernel Object Security Hi Although I am not writing kernel mode code, I do have some questions that I think will be best answered in this forum. Two questions, possibly should be posted sperately. 1. I have user mode code (a C API, DLL) to which I have recently added (NtXxxx) functions for locating the presence of named mutex objects (identied by a naming convention). I thus have functions which allow me to iterate and see what Mutexes are currently in use by my application, and this is used to drive GUI functionality by various tools. My question is there a down side, is there a risk in calling these functions: NtOpenDirectoryObject NtQueryDirectoryObject ? 2. Unrelated, well not directly related. We have code that creates and manages various Mutexes etc obviously for managing concurrency accross processes in our software. Recently I began looking into getting the code to work in a multiple process setup where those processes are logged in differently (ie IIS may be one, an interactive Administrator might be another). If the IIS app (using our library funcs) creates a Mutex, then of course the Administrator running the admin tool, get ACCESS_DENIED and cannot access/use the Mutex. So my question is: what is the minimum I need to do to enable the Mutex to be freely accessible to all processes? Also what "sensible" options are there for me to control security, I mean would it make sense to allow the Mutex creator to do something like this: a. Grant read/wrirte access to all other users/processes b. Grant read/write access to any user within a specified group (ie Administarors) c. Grant read/write access to one or more specific users-group combinations? If so can anyone point me at a good web resource for getting down to the coding of all this? I read up in security and object access in the book "Inside Windows NT" but it was a summary rather than an example based explanation. Many thanks Hugh Tag: Increase Non-Paged Pool Memory Tag: 64114
  - 3
    - looking for guidance and suggestions Hi everyone, I would like to use moufiltr to accomplish the following task. After user presses a button (say right button), the filter driver starts to generate (fake) mouse movement data (say moving the cursor along a closed square loop). It's not difficult to detect the button and add cursor movement data in moufiltr, the difficult is how to send these data in a steady stream (roughly a few packets per second) endlessly UNTIL the user presses a button (or moves the mouse) OR for certain period of time. Any suggestions? Tag: Increase Non-Paged Pool Memory Tag: 64110
  - 4
    - temporarly power down disk drive ASAP I work for an OEM of a tablet PC, we want to do something simalar to IBM's 'Active Protection system', where they use an acceloromitor to detect when the tablet is dropped and shutdown the hard drive. In looking through the DDK documantation I'm at a loss as to where to start, I though about writing a HD filter driver and when needed sending a shutdown packet to the hard disk driver but then how do I keep the rest of the system from bringing it back up too soon? Thanks, Tag: Increase Non-Paged Pool Memory Tag: 64098
  - 5
    - NDIS: driver code placement Hi all, I'm not sure in following question ... If I don't explicitly tell to compiler where it should place my code, it will place it into pageable or non-pageable section? I saw something like this in Oney's book: #pragma alloc_text( PAGE, DispatchPnp) So, If I add my own function, will I have to somehow mark its placement or it is done automaticaly in some predictable way (e.g. if I don't say anything else, it will be placed into nonpaged memory)? Thank's for answers Michal Tag: Increase Non-Paged Pool Memory Tag: 64088
  - 6
    - question about OID_802_11_ADD_KEY When the WZC connects ad hoc I noticed it changed from add_wep in SP1 to add_key in SP2 There is one thing I don't understand. this is what I captured. (the bytes set with OID_802_11_ADD_KEY) 2D 00 00 00 00 00 00 80 0D 00 00 00 FF FF FF FF FF FF D8 76 64 FE 56 03 98 FE 56 03 15 F0 D8 76 70 69 9B 40 0C 11 DC AB 8C 81 F1 83 34 the key index 0x80 indicates that there is no KeyRSC, correct? if so, why is the KeyRSC: D8 76 64 FE 56 03 98 FE 56 03 15 F0 D8 76 and not zero? does the WZC just add some values that are not necessary at all? or have I misunderstood this? thanks /Niklas Tag: Increase Non-Paged Pool Memory Tag: 64086
  - 7
    - PrintProcessor Linking fails Hello Newsgroup! I am new to building drivers. My project is to develop an accounting print processor for PostScript print drivers. In my opinion it is the best way to account the job in the print processor where the data goes to printer port. Is there a better way? I am modifying the src\print\genprint\raw.c file in the loop where we are sending the data. I'm trying to read in the data stream for PS EndPage commands. For this a wanted to do some debugging output, so i wanted to write it in a file. fopen(), fwrite() and so on. I have included the <stdio.h> and the compiling is fine. But on linking i get an error: BUILD: Linking e:\winddk\2600~1.110\src\print\genprint directory Linking Executable - objchk_w2k_x86\i386\genprint.dll for i386 raw.obj : error LNK2019: unresolved external symbol __imp__fopen referenced in function _PrintRawJob@12 objchk_w2k_x86\i386\genprint.dll : error LNK1120: 1 unresolved externals BUILD: Done Then i tried to include the libcpmt.lib in the sources file. But is the same error. What i'm doing wrong? -- Best regards, Lucas Pleß heddier electronc GmbH Tag: Increase Non-Paged Pool Memory Tag: 64085
  - 8
    - AVStream driver performs differently under WinXP and Win2K. Hi all, I have developed a USB camera driver based on AVStream. So far, the driver works fine under WinXP platform. The problem occurs when testing the driver under Win2K (installed with DirectX 9.0c). I have tested with 2 cameras, one of them managed to stream video, but at a much lower frame rate (i.e. 1 fps, as compare to 15-30 fps under WinXP); whereas the other one failed to stream at all, and found that it failed when trying to retrieve the USB descriptor. May I know what could be the reasons for the above observations? Please advise. Thanks and regards, yinmun Tag: Increase Non-Paged Pool Memory Tag: 64079
  - 9
    - 98 ndis driver installer/uninstaller I want to install/uninstall my 98 ndis driver. Is there installer code somewhere to do this? I have been reading on this,what I have figured everywhere on the internet is that it is diffcult to write the install/uninstall for 98. I have not got any explanation anwhere on how to do it. Any pointers will be great as I have been beating on this for a while. regards /n Tag: Increase Non-Paged Pool Memory Tag: 64068
  - 10
    - Using a driver in the login hi, I need to load a driver to talk to a usb dispositive during login[authenticate a user usging a GINA stub]. What is the best alternative to do that? I already have a driver that communicates with the dispositive, but it seems that it doen'st work before logon. thanks a lot! Sara Tag: Increase Non-Paged Pool Memory Tag: 64063
  - 11
    - Print Data Hallo, I want to write a monitoring-tool, which gets all print jobs in a device-independent format and can be used with all printerdrivers. I took some looks on print processors and print providers, but i am not sure, if thats what i'm looking for. TIA, Matthias Tag: Increase Non-Paged Pool Memory Tag: 64052
  - 12
    - Checked build Hi All, In MSDN, it is said that we require checked build version of operating system to test and debug the driver. By making changes in boot.ini(/debug) i was able to boot the system in checked buid(windows XP). But i found no difference between checked and release build as both of them takes same time to load. But in MSDN it is said that checked build will take long time to boot as compared to release build. does it mean that checked build can not be made just by chaning the boot.ini and i need to install the checked build operating system?If so,how do i install the checed build? As i did not find the checked build OS(XP) in the opeating system installation CDs. Would of great help if anyone could guide me how to proceed. Thanks, Senthil Tag: Increase Non-Paged Pool Memory Tag: 64050
  - 13
    - Setting Driver Signing policy programatically Hi Ive read through the other posts and MS KB articles related to the setting of the driver signing policy. I cant determine if there is any way of setting this policy as we require. We have a large number of PCs (with no KB and no monitor) in remote, often non-networked environments. All installations at the sites must be unattended (bar insertion of a CD and pressing a proprietry interface button). These machines have a large range of periphial devices attached. Some of the devices are proprietary (and have signed drivers), others are from 3rd parties (and are both signed and unsigned). Historically we have installed all the SW on these machines from scratch each time we need to install anything (even a single msi). We have been able to do this by setting the driver signing policy in either unattend.txt (for standard installs) or sysprep.inf (for sysprep'd drive images). We are now in an XP Pro SP2 environment and have a need to (occasionally) install unsigned drivers after an initial installation has been completed. This can occur days or months after the initial deployment. For example, a new device is plugged into the unit and we need to install the SW / drivers for just that device. We were previously able to set the driver signing policy using the regsitry or rather we used SECEDIT and GPUPATE. As the machines are often not on a domain (or even networked) setting the domain policy is not an option; we need to set it locally. The customers who own the units are not prepared to have driver signing permanently switched off. If SECEDIT or GPUPDATE are used now (to either set the policy to "ignore" or to "block", then we get the error logged in setupapi.log (as described in 298503). "Permachine codesigning policy settings appear to have been tampered with. Error 13. The Data is invalid" Default of 1 restored to policy. This appears to indicate that we cant set the policy to "block" or "ignore" it will always go to "warn" if you try to programatically set it. Whilst I understand the reasons for tightening up on this setting we have a definite need to bypass this standard security for our business. For new devices and our own devices we now insist on signed drivers. We are still left (for now) with many legacy devices with unsigned drivers. The only solution I have just now is to spy for the warning windows and fire keypresses at the dialogs. Obviously this is less than ideal. Any help or comments appreciated. Tag: Increase Non-Paged Pool Memory Tag: 64048
  - 14
    - How to delete system file in WinXp 64bit platform? Dear Sir, In WinXP 64bit platform, when I use DeleteFile function to delete c:\windows\system32\drivers\a.sys ,it can not delete successfully , the error code is 2(GetLastError ,means can not find the file, but the file is in the folder), I guess the system protect the system folder ,then how can I delete the files in the system folder ? 3ks! Tag: Increase Non-Paged Pool Memory Tag: 64036
  - 15
    - Programming style... originated in the java corner, i have some difficulties to adapt the programming style used in the platform sdk and the ddk. therefore i'd like to know what you think about the way i handled some things. 1) device interface GUIDs not defined in a global header: i tried to find the GUID of disc type devices which are part of the mass storage device group. because i didn't find any, i looked up the GUID value stored in my registry and defined it in my app. is this a bad habit or can i assume that this GUID never changes in further versions of ms win? 2) error checking: SetupDiGetClassDevs and many other functions return a specific value if they fail. so should i check for failure although such case is impossible? e.g. SetupDiGetClassDevs with GUID_DEVINTERFACE_VOLUME should never fail. i ask because useless failure checks make the code unreadable. Tag: Increase Non-Paged Pool Memory Tag: 64033
  - 16
    - Renaming a file The FILE_RENAME_INFORMATION structure has a RootDirectory field that may be non-NULL RootDirectory If the file is not being moved to a different directory, or if the FileName member contains the full pathname, this member is NULL. Otherwise, it is a handle for the root directory under which the file will reside after it is renamed. However, my testing so far has failed to create a non-NULL RootDirectory. I'd like to test my code that will handle this case, but I've not been able to create one . On NTFS file systems: Moving files between Directories with DOS does not do it. Moving files with Explorer does not do this. Rename from DOS does not support moving files between Directorys. Can anyone tell me how to cause this to happen ? -- Gak - Finecats Tag: Increase Non-Paged Pool Memory Tag: 64032
  - 17
    - Keyboard extension Hi. Some month ago I bought a keyboard with a function button. Product: Luminous III Manufacturere: Sharkoon in Germany Please look at: http://www.sharkoon.com/enghtml/input.htm#key3 When I press the new function button "Fn" together with F11 the keyboard is locked so nobody can use it until i unlock it with the same keys. Using the media player i can increase and decrease volume using FN and F9 / F10. What i now like to do is writing a new driver / an extension so i can decide what to do when a shortcut like the two obove is pressed. The reason why i want to do this is, that there's no existing driver i know i can use. I read some articles in the MSDN but i need some examples. Thanks for informations Kai Gillmann Tag: Increase Non-Paged Pool Memory Tag: 64017
  - 18
    - I am new to driver develop I write a lan card driver for my FYP i want to ask , Do it mean that i have to use DDK suite Is there have any product can replace it? Tag: Increase Non-Paged Pool Memory Tag: 64007
  - 19
    - Firewire for Windbg. brand important? Hi all, the machine i bought for debugging drivers does not have firewire, and i'd like to add a PCI board with firewire ports. are there boards that are known not to work for debugging? or doesn't it matter what brand of board I buy? kind regards, Bruno. Tag: Increase Non-Paged Pool Memory Tag: 64000
  - 20
    - 64-bit AMD Hello This is related to filter display driver. Here i am trying to load a data file using EngLoadModule function after that to read from that file i am using EngMapModule function. This is working fine in case of 32 bit but on 64 bit AMD it crashes. It is giving excess violation error at the EngMapModule function. Please if any body can help me on this. Thanks gaurav Tag: Increase Non-Paged Pool Memory Tag: 63988
  - 21
    - Formatted ramdisk Friday, May 27, 2005 Hi, I have modified the ramdisk sample driver to map a reserved memory (Booit.ini /burmemory=128). I also saved a NTFS formatted disk image file that I load during the initialization of my driver so I do not have to format the 128 MB ramdisk every time Windows boots. This works fine on Windows NT, 2000, 2000 SP1,2,3. When I installed the driver in Windows 2000 SP4, Windows prompts me to format the disk even after my driver loaded the formatted disk image. I can format the ramdisk (NTFS) successfully. However I do not want to format the ramdisk manually after every boot. Why Windows 2000 SP4 does not recognize that the disk is already formatted? Is there a way to format the disk NTFS in the driver Thanks, Daniel Tag: Increase Non-Paged Pool Memory Tag: 63980
  - 22
    - USBSTOR.sys 5.1.2600.1106 Anyone know how to turn on debug output in this version? In 5.0 you could play with USBSTOR!USBSTOR_DriverGlobals in the kernel debugger. It seems to be missing in this version. Thanks in advance! -Chad Tag: Increase Non-Paged Pool Memory Tag: 63977
  - 23
    - test test Tag: Increase Non-Paged Pool Memory Tag: 63976
  - 24
    - Unknown Manufacturer Unsuported Device Driver Type XP Pro SP2 I have previously used the above device type to provide support for Minolta Dimage Scan Dual Film Scanner, once installed as this device type the associated software can find and use the scanner, I have done this many times on Intel based machines under W2K and XP Pro & XP Pro SP2 I have recently purchased and AMD64 based machine and installed XP Pro and the driver type no longer exists, it is also missing after installing SP2, is this device type only available on intel based PCs or has it been withdrawn form current XP distributions ? Is there a way arround this problem ? Thanks Cybersloth Tag: Increase Non-Paged Pool Memory Tag: 63972
  - 25
    - multimedia LPS I know this is not the right group, but I'm sure someone here can point me to the correct group or give me some help. I'm looking for more information on the multimedia "LivePlaybackSystem". This page implies it's a set of programs, but I've also herd it's just C# code and you need to roll it into your own app. Either way I'd like to get ahold of it. http://www.microsoft.com/windows/windowsmedia/content_provider/broadcast/profiles/liveplaybacksystem.aspx#Top Any typically the e-mail link on the page generates "550 host not found" . Any clues? Any MSFT people here know where to point me? Dave August Tag: Increase Non-Paged Pool Memory Tag: 63970
- Next
  - 1
    - How to make sure a Service starts BEFORE a user logs on? Hi: I have a regular Windows Service program (not a kernel driver) which must start BEFORE a user logs into his machine (XP or W2K). It works most of the time, but sometimes, I noticed that it started AFTER I log on the machine; especially if I logged in the machine fast right after a reboot. Is there a way in the service program, I can do something to make sure that, after reboot, the service starts before a user logs in the machine (no matter how fast the user is trying to complete his logon process)? Thanks In Advance ! Polaris Tag: Increase Non-Paged Pool Memory Tag: 63962
  - 2
    - debugging related question Hi all, is it legal to let the Power management dispatcher function always return STATUS_UNSUCCESSFUL? i am finishing the pnp handling of my first driver, and i'd like to debug that separatly from power management. kind regards, Bruno. Tag: Increase Non-Paged Pool Memory Tag: 63961
  - 3
    - how to install a custom version of ndisuio.sys Hi all, i'm working on a device driver for the first time ever - a bit out of my depth here, and i would appreciate anyones help ... I'm trying to make a copy of the ndisuio.sys device driver supplied with the winxp ddk, as suggested here http://www.ndis.com/pcakb/KB01010301.htm I've compiled a new version of the driver as directed in the above page seemingly without any problems. this is called ndisvi.sys. The problem i'm having is that i can't get it to install. I've copied it into the \windows\system32\drivers directory and updated the .inf file as suggested (see below). when i try to install it (from network connection->properties->install->protocol->add->have disk) i get the following error message: 'The specified location does not contain information about your hardware' any suggestions would be much appreciated, Chris ----------------------------------------------- [version] Signature = "$Windows NT$" Class = NetTrans ClassGUID = {7B1707CC-4E47-4691-9B44-61EDD981E9D8} Provider = %Msft% LayoutFile = layout.inf [Manufacturer] %Msft%=MSFT [MSFT] %NDISVI_Desc%=Install, NDISVI ;------------------------------------------------------------------------- ; Installation Section ;------------------------------------------------------------------------- [Install] AddReg=Inst_Ndi Characteristics=0x28 ; NCF_HIDDEN | NCF_NOT_USER_REMOVABLE CopyFiles=CpyFiles_Sys ;------------------------------------------------------------------------- ; Ndi installation support ;------------------------------------------------------------------------- [Inst_Ndi] HKR,Ndi,Service,,"Ndisvi" HKR,Ndi,HelpText,,%NDISVI_HelpText% HKR, Ndi\Interfaces, UpperRange,, noupper HKR,"Ndi\Interfaces","LowerRange",,"ndis5,ndis4,ndis5_uio" ;------------------------------------------------------------------------- ; Service installation support ;------------------------------------------------------------------------- [Install.Services] AddService=Ndisvi,,NDISVI_Service_Inst [Ndisuio_Service_Inst] DisplayName = %NDISVI_Desc% ServiceType = 1 ;SERVICE_KERNEL_DRIVER StartType = 3 ;SERVICE_MANUAL_START ErrorControl = 1 ;SERVICE_ERROR_NORMAL ServiceBinary = %12%\ndisvi.sys LoadOrderGroup = NDIS Description = %NDISVI_Desc% [Install.Remove.Services] DelService=Ndisvi ;------------------------------------------------------------------------- ; Declare Destination Directories for file copy/deletion ;------------------------------------------------------------------------- [DestinationDirs] CpyFiles_Sys = 12 ; DIRID_DRIVERS ;------------------------------------------------------------------------- ; Files to Copy/Delete - Referenced by Install and Remove sections above ;------------------------------------------------------------------------- [CpyFiles_Sys] Ndisvi.sys,,,2 [Strings] Msft = "CSM" NDISVI_Desc = "NDIS Usermode I/O Protocol (VI)" NDISVI_HelpText = "A driver to support user-mode I/O on NDIS devices" Tag: Increase Non-Paged Pool Memory Tag: 63950
  - 4
    - Difference between CreateFile & Com_Open Hi, For a serial port device like modem, can any one please tell me the difference between the APIs CreateFile(), COM_Open() and HWOpen(). Thanks, Arsalan Tag: Increase Non-Paged Pool Memory Tag: 63945
  - 5
    - NDIS and memory 2 Hi all, Is it possible to use paged memory in NDIS drivers? I found ExAllocatePool in list of prohibited functions and ExAllocatePoolWithTag in list of discouraged functions and both NdisAllocateMemory and NdisAllocateMemoryWithTag allocate only nonpaged pool. Does it mean that paged memory shouldn't be used in NDIS drivers? Thank's for answer Michal Tag: Increase Non-Paged Pool Memory Tag: 63937
  - 6
    - How to enumerate USB Mass Storage devices? hello. i'm working on a hobby project for my own mp3 (usb mass storage) player and try to enumerate all usb mass storage devices currently connected to my computer. i've been working on this quite a while because i can't get through the msdn efficiently enough. i planned to identify my player like this: 1) enumerate all disks (by SetupDiEnumDeviceInterfaces in conjunction with guid GUID_DEVINTERFACE_DISK) 2) find out those who are mass storage devices (IOCTL_STORAGE_GET_MEDIA_TYPES_EX) 3) get each mass storage device's partition info 4) get a handle to the volume i chose the method above because i wanted to avoid a low level enumeration through the usb hubs. now i'm stuck with step 2 because i don't know how to find out the correct buffer size, needed by DeviceIoControl for the IOCTL_STORAGE_GET_MEDIA_TYPES_EX flag. the documentation didn't explain a proper use any further. so i wonder if any veteran can give me a hint, how to find out the buffer size. thanks. wan-hi Tag: Increase Non-Paged Pool Memory Tag: 63927
  - 7
    - Serious problem with IO manager and device removal Hi All Scenario: i)PnP NIC PcCard USB driver with an IO manager interface created with NdisMRegisterDevice(). ii)Application opens device with CreateFile() and gets a valid handle. iii) Stop NIC driver with Safely Remove Hardware. (Driver Halt function gets called and devext is freed) iv) Application calls DeviceIoControl() on the STILL VALID HANDLE. v) NIC driver image stil in memory, so IOCTL handler called which refgerences the now invalid devext. vi) CRASH. Now, to quote the DDK: "Note that, if a handle to the device object created with NdisMRegisterDevice is open, the driver that created the device object cannot be unloaded." Oh yeah, even NdisMDeregisterDevice() returns 0 if an application still has the handle open. And further: "Before opening a handle to the device object, a user-mode application should therefore register for device event notification, specifying GUID_NDIS_LAN_CLASS as the interface class GUID. On receiving a DBT_DEVICEQUERYREMOVE device event for the device object, the application should close the handle" So it is up to the good behaviour of an application to controlll wether the kernel crashes or not. Hmmm not a very good idea. I suggest the IO manager returns INVALID_HANDLE_VALUE if the device got unloaded and an app calls an IO manager function on it. Tag: Increase Non-Paged Pool Memory Tag: 63924
  - 8
    - Trying to get an IM filter driver to bind to my IM MUX driver at install time Hi, I've got an NDIS IM MUX driver, which is based on the MUX sample in the W2k3 DDK. I'm trying to get an IM filter driver to bind to this, at *install time*. This filter driver is bound to the physical miniport before install (along with TCPIP, MS Client, File & Printer sharing). I've built the MUX notifyob with "DISABLE_PROTOCOLS_TO_PHYSICAL" defined, so ideally, i would expect that after the install, all the protocols that were bound to the physical NIC should now be bound to the MUX miniport. Unfortunately, the filter driver is not bound to it (incidentally, neither is the nlbs driver). I can bind the filter driver after the install, manually from the UI, by checking the box on the MUX miniport, so there isnt anything in the NDIS upperRange or lowerRange to prevent the binding from happening. I've stepped through the notifyobject in the debugger (from breakpoints in SysQueryBindingPath, and NotifyBindingPath) to see if the notifyob ever even got the binding paths with the filter driver in it. I didnt see any. The filter driver's protocol inf has the following interesting lines: 1. [ndi] Characteristics = 0x4490 ; NCF_NDIS_PROTOCOL | NCF_HAS_UI | NCF_FILTER | NCF_NO_SERVICE 2. [AddReg] HKR, Ndi, FilterClass, , failover HKR, Ndi\Interfaces, UpperRange, , noupper HKR, Ndi\Interfaces, LowerRange, , nolower HKR, Ndi\Interfaces, FilterMediaTypes, , "ethernet, nolower" Why isnt the filter drivers binding paths showing up in the notifyob methods ? Alternatively, is there any other way to programmatically bind the filter driver to the MUX driver ? (This is what i really want to achieve) Thanks, Gaurav Tag: Increase Non-Paged Pool Memory Tag: 63920
  - 9
    - Design considerations of usbhub.sys, usbehci.sys.... Hi, About usbhub.sys, usbehci.sys, usbohci.sys, usbuhci there is no documentation available in the DDK. Any help / Any articles regarding the usbhub.sys & usbehci.sys architecture, design considerations (codelevel), URB management, URB queueing, URB Chaining, handling Isochronous & Bulk devices and any other code level architectures? Thanks, Shravan Tag: Increase Non-Paged Pool Memory Tag: 63907
  - 10
    - IOCTL ATA PASS THROUGH.. my task is to copy the 'My Doucments' folder to a specified partition on my local hard disk (using win xp - sp2) Has anyone been able to obtain sample code for this or Any info or directed/related links greatly appreciated. Many thanks in advance. Meyya Tag: Increase Non-Paged Pool Memory Tag: 63897
  - 11
    - Printer driver woes I'm using the bitmap driver sample from the LDK, and am running into a few problems. All I want to do is take the individual scan lines and pass them to an existing DLL that then does some processing. I can't seem to get the FilterGraphics method to get called. I'm return S_OK in the GetImplementedMethod, but no joy. Any hints on how to get that method called would be most appreciated. Since I can't get FilterGraphics working, I've been using ImageProcessing. I've set the PinsPerPhysPass and PinsPerLogPass commands in the GPD to 1, 8, 16 and several other variations, but I always get the same pSrcBitmap sizes when ImageProcessing is called. How do I tell it to only send me one scanline at a time? -- Floyd Tag: Increase Non-Paged Pool Memory Tag: 63896
  - 12
    - DrvTextOut/DrvSendPage overlap Hi, I have written a monolithic printer driver. There is a problem when using MS-Office applications and printing with the my driver. My driver defines fonts that are resident in the printer. Most of the time, the driver works fine using MS-Word and selecting the printer fonts. However, occasionally, the page is terminated too soon. I have narrowed it down to where my DrvTextOut is interrupted (has not hit the return statement yet) by a call to my DrvSendPage (same PDev too). This seems to happen totally random. How can this happen? What should my driver do in this case? It seems like a bug with MS-Office, but I've never heard of it. Any ideas? Please? I'm getting deperate. Thanks Tag: Increase Non-Paged Pool Memory Tag: 63890
  - 13
    - How do I determine modem type? Hi, If I'm looking at modem entries in the registry (class "Modem"), how can I determine the modem's physical connection to the system? For example, how can I tell if a specific modem is connected through PCI, USB, IR, Bluetooth, etc.? I noticed that the "MatchingDeviceId" value (SPDRP_HARDWAREID) usually has the correct type in it, but a few modems seem to be misleading. For example, I have a PCMCIA modem that seems to think its a USB device (apparently it implements a USB hub inside the card, but its not available externally). Is there some other way to determine the physical connection type? Thanks, Ed. Tag: Increase Non-Paged Pool Memory Tag: 63885
  - 14
    - USB Video Capture frame rate drop after Standby/Wake-up cycle Our USB Video Capture device running on XP on USB 2.0 runs at 30 fps. However, if we put the system into Standby mode while capturing a video (either capturing to file or simple video preview) then when the system awakes the video capture resumes but at a frame rate which now fluctuates around 24fps and goes as low as as 22 fps. It is visibly slower - not just a quirk in frame-rate reporting. This reduction in frame rate is not cumulative. i.e. if we repeatedly go into Standby mode and reawaken it remains at around 24fps. The framerate can be is restored to 30fps by simply stopping and restarting the video capture application. The problem does not occur if we attach our device on a USB 1.1 port; the framerate then remains constant through Standby/Wake-up cycles. We have tried to test this on other vendor's USB video capture devices to determine if it is a problem in our drivers but to date have not yet found one that can survive running an application through a Standby/Wake-up cycle without other, far more serious problems. Any assistance, or redirection to a more appropriate forum would be appreciated. Steve Thorpe Tag: Increase Non-Paged Pool Memory Tag: 63884
  - 15
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  - 16
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  - 17
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  - 18
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  - 19
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  - 20
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  - 21
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  - 22
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  - 23
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  - 24
    - AVStream : Remote controller (IR) Dear All, I am developing an AVStream device driver for an MPEG2 USB box. Now I want to implement the remote controller (IR) function. But I don't know what kind of device drivers (HID, IrDA NDIS and etc) should I implement? Where could I get remote controller (IR) sample driver codes? Any comments are very appreciated. Thanks, Edward Tag: Increase Non-Paged Pool Memory Tag: 63836
  - 25
    - Does exist this file on disk ? Is possible to verify in kernel mode if some file on disk exist without calling InitializeObjectAttributes() and ZwCreateFile() and controlling result status ? Does exist some method for enumeration files in directory without using ZwCreateFile() ? Peter Tag: Increase Non-Paged Pool Memory Tag: 63835

I have a 512 MB system, system default allocation:
NonPagedPool Max: 32768 ( 131072 Kb)
PagedPool Maximum: 43008 ( 172032 Kb)

My driver mainly uses Non-Paged pool for memory allocation. With certain
settings, driver run out of Non-Page Pool memory. I tried in registry (
NonPagedPoolSize ) but I did not see any change ( after next reboot ).

How could I increase Non-Paged Pool memory allocation on Windows XP system?

Top

Re: Increase Non-Paged Pool Memory by Pavel

Pavel
Tue May 31 18:36:58 CDT 2005

Please read:
http://support.microsoft.com/default.aspx?scid=kb;en-us;156316

--PA

"Gerry" <Gerry@discussions.microsoft.com> wrote in message news:E45C7504-BE09-48D9-B11F-8CDCA7E2DDFC@microsoft.com...
> I have a 512 MB system, system default allocation:
> NonPagedPool Max: 32768 ( 131072 Kb)
> PagedPool Maximum: 43008 ( 172032 Kb)
>
> My driver mainly uses Non-Paged pool for memory allocation. With certain
> settings, driver run out of Non-Page Pool memory. I tried in registry (
> NonPagedPoolSize ) but I did not see any change ( after next reboot ).
>
> How could I increase Non-Paged Pool memory allocation on Windows XP system?

Top