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| author | Andrew Morton <akpm@osdl.org> | 2006-09-27 01:50:00 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-09-27 08:26:12 -0700 |
| commit | e129b5c23c2b471d47f1c5d2b8b193fc2034af43 (patch) | |
| tree | 78232266849d0f04b056b0f44554bcb476f0b8e1 /include/linux/mmzone.h | |
| parent | fb01439c5b778d5974a488c5d4fe85e6d0e18a68 (diff) | |
| download | lwn-e129b5c23c2b471d47f1c5d2b8b193fc2034af43.tar.gz lwn-e129b5c23c2b471d47f1c5d2b8b193fc2034af43.zip | |
[PATCH] vm: add per-zone writeout counter
The VM is supposed to minimise the number of pages which get written off the
LRU (for IO scheduling efficiency, and for high reclaim-success rates). But
we don't actually have a clear way of showing how true this is.
So add `nr_vmscan_write' to /proc/vmstat and /proc/zoneinfo - the number of
pages which have been written by the vm scanner in this zone and globally.
Cc: Christoph Lameter <clameter@engr.sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/linux/mmzone.h')
| -rw-r--r-- | include/linux/mmzone.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h index 7fa1cbe9fa7a..1b0680cd84d2 100644 --- a/include/linux/mmzone.h +++ b/include/linux/mmzone.h @@ -58,6 +58,7 @@ enum zone_stat_item { NR_WRITEBACK, NR_UNSTABLE_NFS, /* NFS unstable pages */ NR_BOUNCE, + NR_VMSCAN_WRITE, #ifdef CONFIG_NUMA NUMA_HIT, /* allocated in intended node */ NUMA_MISS, /* allocated in non intended node */ |