[PATCH 05/14] resource limits: track highwater mark of stack size

[Topi Miettinen]

Track maximum stack size, to be able to configure
RLIMIT_STACK resource limits. The information is available
with taskstats and cgroupstats netlink socket.

Signed-off-by: Topi Miettinen <toiwoton@xxxxxxxxx>
---
 mm/mmap.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/mm/mmap.c b/mm/mmap.c
index 0b10f56..305c456 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -2019,6 +2019,8 @@ static int acct_stack_growth(struct vm_area_struct *vma, unsigned long size, uns
 	if (security_vm_enough_memory_mm(mm, grow))
 		return -ENOMEM;
 
+	update_resource_highwatermark(RLIMIT_STACK, actual_size);
+
 	return 0;
 }
 
-- 
2.8.1