Hi hackers, In memory contexts, block and chunk sizes are likely to be limited by some upper bounds. Some examples of those bounds can be MEMORYCHUNK_MAX_BLOCKOFFSET and MEMORYCHUNK_MAX_VALUE. Both values are only 1 less than 1GB. This makes memory contexts to have blocks/chunks with sizes less than 1GB. Such sizes can be stored in 32-bits. Currently, "Size" type, which is 64-bit, is used, but 32-bit integers should be enough to store any value less than 1GB.
Attached patch is an attempt to change the types of some fields to uint32 from Size in aset, slab and generation memory contexts. I tried to find most of the places that needed to be changed to uint32, but I probably missed some. I can add more places if you feel like it. I would appreciate any feedback. Thanks, -- Melih Mutlu Microsoft
0001-Change-memory-context-fields-to-uint32.patch
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