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Subject[PATCH -mmotm 3/5] page_cgroup: introduce file cache flags
Date
Introduce page_cgroup flags to keep track of file cache pages.

Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Andrea Righi <arighi@develer.com>
---
include/linux/page_cgroup.h | 22 +++++++++++++++++++++-
1 files changed, 21 insertions(+), 1 deletions(-)
diff --git a/include/linux/page_cgroup.h b/include/linux/page_cgroup.h
index bf9a913..65247e4 100644
--- a/include/linux/page_cgroup.h
+++ b/include/linux/page_cgroup.h
@@ -40,7 +40,11 @@ enum {
PCG_USED, /* this object is in use. */
PCG_ACCT_LRU, /* page has been accounted for */
/* for cache-status accounting */
- PCG_FILE_MAPPED,
+ PCG_FILE_MAPPED, /* page is accounted as file rss*/
+ PCG_FILE_DIRTY, /* page is dirty */
+ PCG_FILE_WRITEBACK, /* page is being written back to disk */
+ PCG_FILE_WRITEBACK_TEMP, /* page is used as temporary buffer for FUSE */
+ PCG_FILE_UNSTABLE_NFS, /* NFS page not yet committed to the server */
};

#define TESTPCGFLAG(uname, lname) \
@@ -83,6 +87,22 @@ TESTPCGFLAG(FileMapped, FILE_MAPPED)
SETPCGFLAG(FileMapped, FILE_MAPPED)
CLEARPCGFLAG(FileMapped, FILE_MAPPED)

+TESTPCGFLAG(FileDirty, FILE_DIRTY)
+SETPCGFLAG(FileDirty, FILE_DIRTY)
+CLEARPCGFLAG(FileDirty, FILE_DIRTY)
+
+TESTPCGFLAG(FileWriteback, FILE_WRITEBACK)
+SETPCGFLAG(FileWriteback, FILE_WRITEBACK)
+CLEARPCGFLAG(FileWriteback, FILE_WRITEBACK)
+
+TESTPCGFLAG(FileWritebackTemp, FILE_WRITEBACK_TEMP)
+SETPCGFLAG(FileWritebackTemp, FILE_WRITEBACK_TEMP)
+CLEARPCGFLAG(FileWritebackTemp, FILE_WRITEBACK_TEMP)
+
+TESTPCGFLAG(FileUnstableNFS, FILE_UNSTABLE_NFS)
+SETPCGFLAG(FileUnstableNFS, FILE_UNSTABLE_NFS)
+CLEARPCGFLAG(FileUnstableNFS, FILE_UNSTABLE_NFS)
+
static inline int page_cgroup_nid(struct page_cgroup *pc)
{
return page_to_nid(pc->page);
--
1.6.3.3


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