From 732855d6b0f1ce047bc1bf99128e13d1e631648b Mon Sep 17 00:00:00 2001 From: Christoph Lameter Date: Wed, 28 Sep 2011 10:50:05 +1000 Subject: [PATCH] mm: add comments to explain mm_struct fields Add comments to explain the page statistics field in the mm_struct. Signed-off-by: Christoph Lameter Signed-off-by: Andrew Morton <> --- include/linux/mm_types.h | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h index 1615a15add8e..9e2939073529 100644 --- a/include/linux/mm_types.h +++ b/include/linux/mm_types.h @@ -293,8 +293,15 @@ 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; -- 2.39.5