Anybody have any insight on this? PagedPool and NonPagedPool is reasonable. The request for system PTE’s is reasonable. Is there any way to tell what pages are locked down? What pages are mapped?
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One possible reason is you create your own IRP for Read/Write and do not
free Mdl after the IRP was processed. Mdl will be allocated by file system
and normally IO manager will free it but if you created those irp you are
responsible to free Mdl pointed by pIrp->MdlAddress.
Alexei.
Anybody have any insight on this? PagedPool and NonPagedPool is
reasonable. The request for system PTE’s is reasonable. Is there any way
to tell what pages are locked down? What pages are mapped?
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I am aware of this. These are not my drivers I’m trying to debug. In fact, I’m not sure which driver is responsible. That is what I’m trying to determine.
-----Original Message-----
From: Alexei Jelvis [mailto:xxxxx@mondenet.com]
Sent: Thursday, February 07, 2002 11:33 AM
To: File Systems Developers
Subject: [ntfsd] Re: debugging NO_MORE_SYSTEM_PTES (bugcode/stopcode
0x3f)
One possible reason is you create your own IRP for Read/Write and do not
free Mdl after the IRP was processed. Mdl will be allocated by file system
and normally IO manager will free it but if you created those irp you are
responsible to free Mdl pointed by pIrp->MdlAddress.
Alexei.
Anybody have any insight on this? PagedPool and NonPagedPool is
reasonable. The request for system PTE’s is reasonable. Is there any way
to tell what pages are locked down? What pages are mapped?
You are currently subscribed to ntfsd as: xxxxx@inin.com
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!memusage in WinDbg will provide information about mapped files.
Anybody have any insight on this? PagedPool and NonPagedPool is
reasonable. The request for system PTE’s is reasonable. Is there any way
to tell what pages are locked down? What pages are mapped?
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I have checked out !memusage and !vm. I’ve dumped the VAD tree (!vad) for the suspected process and its physical to virtual map (!ptov.) I have dumped all the PFN entries. I have dumped the system PTE’s (!sysptes.) In all this garbage, I don’t see squat to indicate a page is locked. Perhaps I need to dump all the PFN entries individually instead of as a range. Perhaps I need to see what I can with the OEM support tools.
I looked in the Knowledge Base and found nothing more than a bunch of suggestions for debugging this with driver verifier and other W2K-only tools. This is a production NT4 SP6a system. Driver verifier is not an option.
-----Original Message-----
From: Alexei Jelvis [mailto:xxxxx@mondenet.com]
Sent: Friday, February 08, 2002 6:57 AM
To: File Systems Developers
Subject: [ntfsd] Re: debugging NO_MORE_SYSTEM_PTES (bugcode/stopcode
0x3f)
!memusage in WinDbg will provide information about mapped files.
Anybody have any insight on this? PagedPool and NonPagedPool is
reasonable. The request for system PTE’s is reasonable. Is there any way
to tell what pages are locked down? What pages are mapped?
You are currently subscribed to ntfsd as: xxxxx@inin.com
To unsubscribe send a blank email to leave-ntfsd-$subst(‘Recip.MemberIDChar’)@lists.osr.com
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Problem solved.
-----Original Message-----
From: Fuller, Rob
Sent: Friday, February 08, 2002 2:02 PM
To: File Systems Developers
Subject: [ntfsd] Re: debugging NO_MORE_SYSTEM_PTES (bugcode/stopcode
0x3f)
I have checked out !memusage and !vm. I’ve dumped the VAD tree (!vad) for the suspected process and its physical to virtual map (!ptov.) I have dumped all the PFN entries. I have dumped the system PTE’s (!sysptes.) In all this garbage, I don’t see squat to indicate a page is locked. Perhaps I need to dump all the PFN entries individually instead of as a range. Perhaps I need to see what I can with the OEM support tools.
I looked in the Knowledge Base and found nothing more than a bunch of suggestions for debugging this with driver verifier and other W2K-only tools. This is a production NT4 SP6a system. Driver verifier is not an option.
-----Original Message-----
From: Alexei Jelvis [mailto:xxxxx@mondenet.com]
Sent: Friday, February 08, 2002 6:57 AM
To: File Systems Developers
Subject: [ntfsd] Re: debugging NO_MORE_SYSTEM_PTES (bugcode/stopcode
0x3f)
!memusage in WinDbg will provide information about mapped files.
Anybody have any insight on this? PagedPool and NonPagedPool is
reasonable. The request for system PTE’s is reasonable. Is there any way
to tell what pages are locked down? What pages are mapped?
You are currently subscribed to ntfsd as: xxxxx@inin.com
To unsubscribe send a blank email to leave-ntfsd-$subst(‘Recip.MemberIDChar’)@lists.osr.com
You are currently subscribed to ntfsd as: xxxxx@inin.com
To unsubscribe send a blank email to leave-ntfsd-$subst(‘Recip.MemberIDChar’)@lists.osr.com
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Would you be inclined to share your hard-earned wisdom with the rest of us
for posterity?
“Fuller, Rob” @lists.osr.com on 02/08/2002 04:30:08 PM
Please respond to “File Systems Developers”
Sent by: xxxxx@lists.osr.com
To: “File Systems Developers”
cc:
Subject: [ntfsd] Re: debugging NO_MORE_SYSTEM_PTES (bugcode/stopcode 0x3f)
Problem solved.
—
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