xnu-344.12.2.tar.gz

[apple/xnu.git] / osfmk / ppc / pmap.c

diff --git a/osfmk/ppc/pmap.c b/osfmk/ppc/pmap.c
index f6f6a8e34d732d53fd0a1d62b1952c45f629837f..85fabb668fb1b472e1c7b0d3645c50ce534f640d 100644 (file)
--- a/osfmk/ppc/pmap.c
+++ b/osfmk/ppc/pmap.c
@@ -483,6 +483,9 @@ pmap_bootstrap(unsigned int mem_size, vm_offset_t *first_avail, vm_offset_t *fir
             hash_table_size *= 2)
                continue;
 
+       if (num > (sizeof(pte_t) * 524288))
+               hash_table_size = hash_table_size/2; /* reduce by half above 512MB */
+
        /* Scale to within any physical memory layout constraints */
        do {
                num = atop(mem_size);   /* num now holds mem_size in pages */