aboutsummaryrefslogtreecommitdiffstats
path: root/include/linux/page-flags.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/linux/page-flags.h')
-rw-r--r--include/linux/page-flags.h12
1 files changed, 11 insertions, 1 deletions
diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h
index dede8d412dca..d52999c43336 100644
--- a/include/linux/page-flags.h
+++ b/include/linux/page-flags.h
@@ -79,13 +79,23 @@
79/* 79/*
80 * Global page accounting. One instance per CPU. Only unsigned longs are 80 * Global page accounting. One instance per CPU. Only unsigned longs are
81 * allowed. 81 * allowed.
82 *
83 * - Fields can be modified with xxx_page_state and xxx_page_state_zone at
84 * any time safely (which protects the instance from modification by
85 * interrupt.
86 * - The __xxx_page_state variants can be used safely when interrupts are
87 * disabled.
88 * - The __xxx_page_state variants can be used if the field is only
89 * modified from process context, or only modified from interrupt context.
90 * In this case, the field should be commented here.
82 */ 91 */
83struct page_state { 92struct page_state {
84 unsigned long nr_dirty; /* Dirty writeable pages */ 93 unsigned long nr_dirty; /* Dirty writeable pages */
85 unsigned long nr_writeback; /* Pages under writeback */ 94 unsigned long nr_writeback; /* Pages under writeback */
86 unsigned long nr_unstable; /* NFS unstable pages */ 95 unsigned long nr_unstable; /* NFS unstable pages */
87 unsigned long nr_page_table_pages;/* Pages used for pagetables */ 96 unsigned long nr_page_table_pages;/* Pages used for pagetables */
88 unsigned long nr_mapped; /* mapped into pagetables */ 97 unsigned long nr_mapped; /* mapped into pagetables.
98 * only modified from process context */
89 unsigned long nr_slab; /* In slab */ 99 unsigned long nr_slab; /* In slab */
90#define GET_PAGE_STATE_LAST nr_slab 100#define GET_PAGE_STATE_LAST nr_slab
91 101