linux-kernel - [RFC 18/18] proc: present VM_LOCKED memory in /proc/self/maps

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Date:	Mon, 13 Jun 2016 22:44:25 +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>,
	Michal Hocko <mhocko@...e.com>,
	Konstantin Khlebnikov <koct9i@...il.com>,
	Vlastimil Babka <vbabka@...e.cz>,
	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
	Jerome Marchand <jmarchan@...hat.com>,
	Laurent Dufour <ldufour@...ux.vnet.ibm.com>,
	Naoya Horiguchi <n-horiguchi@...jp.nec.com>,
	Gerald Schaefer <gerald.schaefer@...ibm.com>,
	Johannes Weiner <hannes@...xchg.org>
Subject: [RFC 18/18] proc: present VM_LOCKED memory in /proc/self/maps

Add a flag to /proc/self/maps to show that the memory area is locked.

Signed-off-by: Topi Miettinen <toiwoton@...il.com>
---
 fs/proc/task_mmu.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index 4648c7f..8229509 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -313,13 +313,14 @@ show_map_vma(struct seq_file *m, struct vm_area_struct *vma, int is_pid)
 		end -= PAGE_SIZE;
 
 	seq_setwidth(m, 25 + sizeof(void *) * 6 - 1);
-	seq_printf(m, "%08lx-%08lx %c%c%c%c %08llx %02x:%02x %lu ",
+	seq_printf(m, "%08lx-%08lx %c%c%c%c%c %08llx %02x:%02x %lu ",
 			start,
 			end,
 			flags & VM_READ ? 'r' : '-',
 			flags & VM_WRITE ? 'w' : '-',
 			flags & VM_EXEC ? 'x' : '-',
 			flags & VM_MAYSHARE ? 's' : 'p',
+			flags & VM_LOCKED ? 'l' : '-',
 			pgoff,
 			MAJOR(dev), MINOR(dev), ino);
 
-- 
2.8.1