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authorJoonsoo Kim <iamjoonsoo.kim@lge.com>2016-10-08 02:58:30 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2016-10-08 04:46:27 +0300
commit9300d8dfd282bd1473395c5c4c76bfdc90b05978 (patch)
tree7e22780b9e02e88da9bf1bd49a78b61c4f340af2 /include/linux/page_ext.h
parent980ac1672e7edaa927557a5186f1967cd45afcf5 (diff)
downloadlinux-9300d8dfd282bd1473395c5c4c76bfdc90b05978.tar.xz
mm/page_owner: don't define fields on struct page_ext by hard-coding
There is a memory waste problem if we define field on struct page_ext by hard-coding. Entry size of struct page_ext includes the size of those fields even if it is disabled at runtime. Now, extra memory request at runtime is possible so page_owner don't need to define it's own fields by hard-coding. This patch removes hard-coded define and uses extra memory for storing page_owner information in page_owner. Most of code are just mechanical changes. Link: http://lkml.kernel.org/r/1471315879-32294-7-git-send-email-iamjoonsoo.kim@lge.com Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com> Acked-by: Vlastimil Babka <vbabka@suse.cz> Cc: Minchan Kim <minchan@kernel.org> Cc: Michal Hocko <mhocko@kernel.org> Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/page_ext.h')
-rw-r--r--include/linux/page_ext.h6
1 files changed, 0 insertions, 6 deletions
diff --git a/include/linux/page_ext.h b/include/linux/page_ext.h
index 179bdc4a470c..9298c393ddaa 100644
--- a/include/linux/page_ext.h
+++ b/include/linux/page_ext.h
@@ -44,12 +44,6 @@ enum page_ext_flags {
*/
struct page_ext {
unsigned long flags;
-#ifdef CONFIG_PAGE_OWNER
- unsigned int order;
- gfp_t gfp_mask;
- int last_migrate_reason;
- depot_stack_handle_t handle;
-#endif
};
extern void pgdat_page_ext_init(struct pglist_data *pgdat);