lidavidm commented on a change in pull request #12116:
URL: https://github.com/apache/arrow/pull/12116#discussion_r809179785
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File path: cpp/src/arrow/device.h
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@@ -223,4 +236,55 @@ class ARROW_EXPORT CPUMemoryManager : public MemoryManager
{
ARROW_EXPORT
std::shared_ptr<MemoryManager> default_cpu_memory_manager();
+/// A memory manager that uses the immutable zeros interface of the given
memory pool,
+/// rather than the normal mutable buffer interface.
Review comment:
You do have good points. These abstractions are rather new, or at least
under-used, and could be refined.
Most APIs do indeed work with MemoryPool, not MemoryManager; MemoryPool has
been there for quite a long time, and MemoryManager was only added relatively
recently, to support non-CPU memory. The right place would be JIRA and/or the
ML, I think. (Or just an ML post referencing this thread; GitHub is OK for
discussion, we might just need more eyes.)
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