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| author | Christoph Lameter <clameter@sgi.com> | 2006-06-30 01:55:34 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-06-30 11:25:34 -0700 |
| commit | 65ba55f500a37272985d071c9bbb35256a2f7c14 (patch) | |
| tree | e7735326ef2d2dca9d00a6c5ae47e9eb03c7834f /include/linux | |
| parent | 2244b95a7bcf8d24196f8a3a44187ba5dfff754c (diff) | |
| download | op-kernel-dev-65ba55f500a37272985d071c9bbb35256a2f7c14.zip op-kernel-dev-65ba55f500a37272985d071c9bbb35256a2f7c14.tar.gz | |
[PATCH] zoned vm counters: convert nr_mapped to per zone counter
nr_mapped is important because it allows a determination of how many pages of
a zone are not mapped, which would allow a more efficient means of determining
when we need to reclaim memory in a zone.
We take the nr_mapped field out of the page state structure and define a new
per zone counter named NR_FILE_MAPPED (the anonymous pages will be split off
from NR_MAPPED in the next patch).
We replace the use of nr_mapped in various kernel locations. This avoids the
looping over all processors in try_to_free_pages(), writeback, reclaim (swap +
zone reclaim).
[akpm@osdl.org: bugfix]
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 'include/linux')
| -rw-r--r-- | include/linux/mmzone.h | 3 | ||||
| -rw-r--r-- | include/linux/vmstat.h | 2 |
2 files changed, 3 insertions, 2 deletions
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h index 543f9e4..eb42c12 100644 --- a/include/linux/mmzone.h +++ b/include/linux/mmzone.h @@ -47,6 +47,9 @@ struct zone_padding { #endif enum zone_stat_item { + NR_FILE_MAPPED, /* mapped into pagetables. + only modified from process context */ + NR_VM_ZONE_STAT_ITEMS }; struct per_cpu_pages { diff --git a/include/linux/vmstat.h b/include/linux/vmstat.h index 3fd5c11..8ab8229 100644 --- a/include/linux/vmstat.h +++ b/include/linux/vmstat.h @@ -26,8 +26,6 @@ struct page_state { unsigned long nr_writeback; /* Pages under writeback */ unsigned long nr_unstable; /* NFS unstable pages */ unsigned long nr_page_table_pages;/* Pages used for pagetables */ - unsigned long nr_mapped; /* mapped into pagetables. - * only modified from process context */ unsigned long nr_slab; /* In slab */ #define GET_PAGE_STATE_LAST nr_slab |
