On Wed, 17 Aug 2011, Andrew Morton wrote:
> This is an obvious place. Could I ask that you split all these up into
> one-definition-per-line and we can start in on properly documenting
> each field?
Subject: mm: Add comments to explain mm_struct fields
Explain comments to explain the page statistics field in the
mm_struct.
Signed-off-by: Christoph Lameter <cl@xxxxxxxxx>
---
include/linux/mm_types.h | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)
Index: linux-2.6/include/linux/mm_types.h
===================================================================
--- linux-2.6.orig/include/linux/mm_types.h 2011-08-23 09:43:32.000000000 -0500
+++ linux-2.6/include/linux/mm_types.h 2011-08-23 09:52:09.000000000 -0500
@@ -281,8 +281,15 @@ struct mm_struct {
unsigned long hiwater_rss; /* High-watermark of RSS usage */
unsigned long hiwater_vm; /* High-water virtual memory usage */
- unsigned long total_vm, locked_vm, pinned_vm, shared_vm, exec_vm;
- unsigned long stack_vm, reserved_vm, def_flags, nr_ptes;
+ unsigned long total_vm; /* Total pages mapped */
+ unsigned long locked_vm /* Pages that have PG_mlocked set */
+ unsigned long pinned_vm; /* Refcount permanently increased */
+ unsigned long shared_vm; /* Shared pages (files) */
+ unsigned long exec_vm; /* VM_EXEC & ~VM_WRITE */
+ unsigned long stack_vm; /* VM_GROWSUP/DOWN */
+ unsigned long reserved_vm; /* VM_RESERVED|VM_IO pages */
+ unsigned long def_flags;
+ unsigned long nr_ptes; /* Page table pages */
unsigned long start_code, end_code, start_data, end_data;
unsigned long start_brk, brk, start_stack;
unsigned long arg_start, arg_end, env_start, env_end;
--
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