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The base address (STACK_TOP / 3 * 2) for a 64-bit program is two thirds into the 4GB segment at 0x2aa00000000. The randomization added on z13 can eat another 1GB of the remaining 1.33GB to the next 4GB boundary. In the worst case 300MB are left for the executable + bss which may cross into the next 4GB segment. This is bad for branch prediction, therefore align the base address to 4GB to give the program more room before it crosses the 4GB boundary. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> |
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| .. | ||
| cmm.c | ||
| dump_pagetables.c | ||
| extable.c | ||
| extmem.c | ||
| fault.c | ||
| gup.c | ||
| hugetlbpage.c | ||
| init.c | ||
| maccess.c | ||
| Makefile | ||
| mem_detect.c | ||
| mmap.c | ||
| page-states.c | ||
| pageattr.c | ||
| pgtable.c | ||
| vmem.c | ||