RFR: 8337563: NMT: rename MEMFLAGS to MemFlag

[Stefan Karlsson]

On Thu, 15 Aug 2024 06:31:14 GMT, David Holmes <dholmes at openjdk.org> wrote:

> > Whatever we choose we also need to consider the mt prefix of things like mtGC, mtClass, etc.
> 
> And what does that stand for: memory type? memory tracker? Arguably they should have been nmtGC etc.

The memflags.hpp file says that it's a memory type:

+#define MEMORY_TYPES_DO(f)                                                           \
+  /* Memory type by sub systems. It occupies lower byte. */                          \
+  f(mtJavaHeap,       "Java Heap")   /* Java heap                                 */ \

My guess is that at some point there was an incomplete rename from "memory type".

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PR Comment: https://git.openjdk.org/jdk/pull/20497#issuecomment-2290832943