mm: smaps: export mlock information
Currently there is no way to find whether a process has locked its pages
in memory or not. And which of the memory regions are locked in memory.
Add a new field "Locked" to export this information via the smaps file.
Signed-off-by: Nikanth Karthikesan <knikanth@suse.de>
Acked-by: Balbir Singh <balbir@linux.vnet.ibm.com>
Acked-by: Wu Fengguang <fengguang.wu@intel.com>
Cc: Matt Mackall <mpm@selenic.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index c3755bd..60b9148 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -418,7 +418,8 @@
"Anonymous: %8lu kB\n"
"Swap: %8lu kB\n"
"KernelPageSize: %8lu kB\n"
- "MMUPageSize: %8lu kB\n",
+ "MMUPageSize: %8lu kB\n"
+ "Locked: %8lu kB\n",
(vma->vm_end - vma->vm_start) >> 10,
mss.resident >> 10,
(unsigned long)(mss.pss >> (10 + PSS_SHIFT)),
@@ -430,7 +431,9 @@
mss.anonymous >> 10,
mss.swap >> 10,
vma_kernel_pagesize(vma) >> 10,
- vma_mmu_pagesize(vma) >> 10);
+ vma_mmu_pagesize(vma) >> 10,
+ (vma->vm_flags & VM_LOCKED) ?
+ (unsigned long)(mss.pss >> (10 + PSS_SHIFT)) : 0);
if (m->count < m->size) /* vma is copied successfully */
m->version = (vma != get_gate_vma(task)) ? vma->vm_start : 0;