[Rpm-maint] [rpm-software-management/rpm] Consider available memory and address space for parallel execution (PR #2418)

[Michal Domonkos]

@dmnks commented on this pull request.



> @@ -1174,6 +1177,89 @@ static void doShescape(MacroBuf mb, rpmMacroEntry me, ARGV_t argv, size_t *parse
     mbAppend(mb, '\'');
 }
 
+static unsigned long getmem_total(void)
+{
+    unsigned long mem = 0;
+    long int pagesize = sysconf(_SC_PAGESIZE);
+    long int pages = sysconf(_SC_PHYS_PAGES);
+
+    if (pagesize < 0)
+	pagesize = 4096;
+    if (pages > 0)
+	mem = pages * pagesize;
+
+    return mem;
+}
+
+static unsigned long getmem_proc(int thread)

OK, reading through the code again, it probably makes more sense to keep both cases in the same function, to reflect the `%{getnproc}` macro which itself takes an argument to return thread count. So nevermind the above :smile: 

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