[ros-dev] Using zones in NTOS
noog at libero.it
Sat Oct 23 16:35:47 CEST 2004
At 14.48 23/10/2004, you wrote:
>What are the advantages in using zones when allocating memory in kernel mode?
I assume you use "zone" as the old word for "lookaside lists". Since there
only are two possible kernel-mode pools vs infinite user-mode heaps, they
are a way to have a sort of specialized "private heap" for frequent, small
allocations (like IRPs and MDLs). They spare you frequent calls to the
heavier (and globally locking - I don't know if reentrancy issues allow you
to have a lock-free implementation) pool allocator
>Are there other ways to pre-allocate an address range to be used for small
>memory objects management (NP pool)?
Aside from rolling your own, no. Lookaside lists would still have the
advantage of being traced and profiled
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