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

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Date:	Fri, 15 Jul 2016 13:35:52 +0300
From:	Topi Miettinen <toiwoton@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	Topi Miettinen <toiwoton@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Oleg Nesterov <oleg@...hat.com>,
	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
	Chen Gang <gang.chen.5i5j@...il.com>,
	Michal Hocko <mhocko@...e.com>,
	Konstantin Khlebnikov <koct9i@...il.com>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Andrey Ryabinin <aryabinin@...tuozzo.com>,
	linux-mm@...ck.org (open list:MEMORY MANAGEMENT)
Subject: [PATCH 05/14] resource limits: track highwater mark of stack size

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@...il.com>
---
 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