Question, crashes, x86, .net8 and largeaddressaware

[podprad]

I manually load coreclr 8.x.x in unmanaged x86 app compiled with largeaddressaware flag. So the process is able to use the memory above 0x80000000 (2GB).

In general, works fine, however...

Sometimes the app throws out of memory exception, for example when loading 50MB managed DLL. In such a situation VMMap shows that allocated pages occupy no more than 1.6GB. I assume I still have at least 1.0GB of free memory available, even if memory below 0x80000000 is fragmented. So why it throws?

Is there something that I am not aware of?

Best regards