linux/arch/s390/mm
Martin Schwidefsky 4ba2815d3b s390/mm: align 64-bit PIE binaries to 4GB
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>
2015-02-19 10:36:32 +01:00
..
cmm.c s390: convert use of typedef ctl_table to struct ctl_table 2013-10-28 08:36:25 +01:00
dump_pagetables.c s390/mm: remove change bit override support 2014-09-25 10:52:09 +02:00
extable.c s390/exceptions: switch to relative exception table entries 2012-09-26 15:45:10 +02:00
extmem.c s390/comments: unify copyright messages and remove file names 2012-07-20 11:15:04 +02:00
fault.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2015-02-11 17:42:32 -08:00
gup.c mm: gup: use get_user_pages_unlocked within get_user_pages_fast 2015-02-11 17:06:05 -08:00
hugetlbpage.c mm/hugetlb: reduce arch dependent code around follow_huge_* 2015-02-11 17:06:01 -08:00
init.c s390: avoid z13 cache aliasing 2015-01-22 12:15:59 +01:00
maccess.c /dev/mem: Use more consistent data types 2014-11-10 15:59:21 +01:00
Makefile s390/mem_detect: move memory detection code to mm folder 2013-05-02 15:50:22 +02:00
mem_detect.c s390/mm: Convert bootmem to memblock 2014-05-20 08:58:40 +02:00
mmap.c s390/mm: align 64-bit PIE binaries to 4GB 2015-02-19 10:36:32 +01:00
page-states.c s390/cmma: remove "cmma disable" code in case of dump again 2014-05-20 08:58:42 +02:00
pageattr.c mm/debug-pagealloc: make debug-pagealloc boottime configurable 2014-12-13 12:42:48 -08:00
pgtable.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2015-02-11 17:42:32 -08:00
vmem.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2014-10-14 03:47:00 +02:00