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authorChristoph Lameter <clameter@sgi.com>2006-06-30 04:55:36 -0400
committerLinus Torvalds <torvalds@g5.osdl.org>2006-06-30 14:25:35 -0400
commitf3dbd34460ff54962d3e3244b6bcb7f5295356e6 (patch)
tree91caae2b90d684a7640b5da451a9a2ff8a5c8fb8 /fs/proc
parentbf02cf4b6cf931d060ad5c6ce9b960af6faefd2d (diff)
[PATCH] zoned vm counters: split NR_ANON_PAGES off from NR_FILE_MAPPED
The current NR_FILE_MAPPED is used by zone reclaim and the dirty load calculation as the number of mapped pagecache pages. However, that is not true. NR_FILE_MAPPED includes the mapped anonymous pages. This patch separates those and therefore allows an accurate tracking of the anonymous pages per zone. It then becomes possible to determine the number of unmapped pages per zone and we can avoid scanning for unmapped pages if there are none. Also it may now be possible to determine the mapped/unmapped ratio in get_dirty_limit. Isnt the number of anonymous pages irrelevant in that calculation? Note that this will change the meaning of the number of mapped pages reported in /proc/vmstat /proc/meminfo and in the per node statistics. This may affect user space tools that monitor these counters! NR_FILE_MAPPED works like NR_FILE_DIRTY. It is only valid for pagecache pages. Signed-off-by: Christoph Lameter <clameter@sgi.com> Cc: Trond Myklebust <trond.myklebust@fys.uio.no> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs/proc')
-rw-r--r--fs/proc/proc_misc.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/proc/proc_misc.c b/fs/proc/proc_misc.c
index 1af12fd77fe6..ff809656ce31 100644
--- a/fs/proc/proc_misc.c
+++ b/fs/proc/proc_misc.c
@@ -168,6 +168,7 @@ static int meminfo_read_proc(char *page, char **start, off_t off,
168 "SwapFree: %8lu kB\n" 168 "SwapFree: %8lu kB\n"
169 "Dirty: %8lu kB\n" 169 "Dirty: %8lu kB\n"
170 "Writeback: %8lu kB\n" 170 "Writeback: %8lu kB\n"
171 "AnonPages: %8lu kB\n"
171 "Mapped: %8lu kB\n" 172 "Mapped: %8lu kB\n"
172 "Slab: %8lu kB\n" 173 "Slab: %8lu kB\n"
173 "CommitLimit: %8lu kB\n" 174 "CommitLimit: %8lu kB\n"
@@ -191,6 +192,7 @@ static int meminfo_read_proc(char *page, char **start, off_t off,
191 K(i.freeswap), 192 K(i.freeswap),
192 K(ps.nr_dirty), 193 K(ps.nr_dirty),
193 K(ps.nr_writeback), 194 K(ps.nr_writeback),
195 K(global_page_state(NR_ANON_PAGES)),
194 K(global_page_state(NR_FILE_MAPPED)), 196 K(global_page_state(NR_FILE_MAPPED)),
195 K(ps.nr_slab), 197 K(ps.nr_slab),
196 K(allowed), 198 K(allowed),