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From: Andrea Righi on 9 Mar 2010 18:10
Introduce page_cgroup flags to keep track of file cache pages.

Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu(a)jp.fujitsu.com>
Signed-off-by: Andrea Righi <arighi(a)develer.com>
---
include/linux/page_cgroup.h | 26 ++++++++++++++++++++++++++
1 files changed, 26 insertions(+), 0 deletions(-)

diff --git a/include/linux/page_cgroup.h b/include/linux/page_cgroup.h
index 0d2f92c..4e09c8c 100644
--- a/include/linux/page_cgroup.h
+++ b/include/linux/page_cgroup.h
@@ -39,6 +39,11 @@ enum {
PCG_CACHE, /* charged as cache */
PCG_USED, /* this object is in use. */
PCG_ACCT_LRU, /* page has been accounted for */
+ PCG_ACCT_FILE_MAPPED, /* page is accounted as file rss*/
+ PCG_ACCT_DIRTY, /* page is dirty */
+ PCG_ACCT_WRITEBACK, /* page is being written back to disk */
+ PCG_ACCT_WRITEBACK_TEMP, /* page is used as temporary buffer for FUSE */
+ PCG_ACCT_UNSTABLE_NFS, /* NFS page not yet committed to the server */
};

#define TESTPCGFLAG(uname, lname) \
@@ -73,6 +78,27 @@ CLEARPCGFLAG(AcctLRU, ACCT_LRU)
TESTPCGFLAG(AcctLRU, ACCT_LRU)
TESTCLEARPCGFLAG(AcctLRU, ACCT_LRU)

+/* File cache and dirty memory flags */
+TESTPCGFLAG(FileMapped, ACCT_FILE_MAPPED)
+SETPCGFLAG(FileMapped, ACCT_FILE_MAPPED)
+CLEARPCGFLAG(FileMapped, ACCT_FILE_MAPPED)
+
+TESTPCGFLAG(Dirty, ACCT_DIRTY)
+SETPCGFLAG(Dirty, ACCT_DIRTY)
+CLEARPCGFLAG(Dirty, ACCT_DIRTY)
+
+TESTPCGFLAG(Writeback, ACCT_WRITEBACK)
+SETPCGFLAG(Writeback, ACCT_WRITEBACK)
+CLEARPCGFLAG(Writeback, ACCT_WRITEBACK)
+
+TESTPCGFLAG(WritebackTemp, ACCT_WRITEBACK_TEMP)
+SETPCGFLAG(WritebackTemp, ACCT_WRITEBACK_TEMP)
+CLEARPCGFLAG(WritebackTemp, ACCT_WRITEBACK_TEMP)
+
+TESTPCGFLAG(UnstableNFS, ACCT_UNSTABLE_NFS)
+SETPCGFLAG(UnstableNFS, ACCT_UNSTABLE_NFS)
+CLEARPCGFLAG(UnstableNFS, ACCT_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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