Chained MDL

NTDEV
1

Hi,
Does anyone know how functions like MmProbeAndLockPages and
MmBuildMdlForNonPagedPool
treat a chained MDL? Do they only pick up the first MDL of the chain or
traverse the
whole chain? Do they care the Next field?

Thanks.

Wei

2

it appears (based on a quick read of the code) that MmProbeAndLockPages
only locks down a single MDL. If you want to lock down a chain you’ll
have to probe & lock every entry in the chain.

MmBuildMdlForNonPagedPool initializes an MDL given a non-paged-pool
address and a length. Since the buffer is virtually contiguous there is
no need for a chained MDL. The answer to the question you asked is no,
but perhaps you ment to ask about a function other than
MmBuildMdlForNonPagedPool.

-p

-----Original Message-----
From: chen, wei [mailto:xxxxx@emc.com]
Sent: Friday, July 19, 2002 9:00 AM
To: NT Developers Interest List
Subject: [ntdev] Chained MDL

Hi,
Does anyone know how functions like MmProbeAndLockPages and
MmBuildMdlForNonPagedPool treat a chained MDL? Do they only pick up the
first MDL of the chain or traverse the
whole chain? Do they care the Next field?

Thanks.

Wei

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