Messages in this thread Patch in this message | | | Date | Tue, 6 Dec 2005 10:28:48 -0800 (PST) | From | Christoph Lameter <> | Subject | [RFC 2/3] Make nr_mapped a per node counter |
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Make nr_mapped a per node counter
The per cpu nr_mapped counter is important because it allows a determination how many pages of a node are not mapped, which would allow a more effiecient means of determining when a node should reclaim memory.
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Index: linux-2.6.15-rc3/include/linux/page-flags.h =================================================================== --- linux-2.6.15-rc3.orig/include/linux/page-flags.h 2005-12-01 00:35:38.000000000 -0800 +++ linux-2.6.15-rc3/include/linux/page-flags.h 2005-12-01 00:35:49.000000000 -0800 @@ -85,7 +85,6 @@ 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 */ unsigned long nr_slab; /* In slab */ #define GET_PAGE_STATE_LAST nr_slab @@ -165,8 +164,8 @@ extern void __mod_page_state(unsigned lo /* * Node based accounting with per cpu differentials. */ -enum node_stat_item { }; -#define NR_STAT_ITEMS 0 +enum node_stat_item { NR_MAPPED }; +#define NR_STAT_ITEMS 1 extern unsigned long vm_stat_global[NR_STAT_ITEMS]; extern unsigned long vm_stat_node[MAX_NUMNODES][NR_STAT_ITEMS]; Index: linux-2.6.15-rc3/drivers/base/node.c =================================================================== --- linux-2.6.15-rc3.orig/drivers/base/node.c 2005-11-28 19:51:27.000000000 -0800 +++ linux-2.6.15-rc3/drivers/base/node.c 2005-12-01 00:35:49.000000000 -0800 @@ -53,8 +53,6 @@ static ssize_t node_read_meminfo(struct ps.nr_dirty = 0; if ((long)ps.nr_writeback < 0) ps.nr_writeback = 0; - if ((long)ps.nr_mapped < 0) - ps.nr_mapped = 0; if ((long)ps.nr_slab < 0) ps.nr_slab = 0; @@ -83,7 +81,7 @@ static ssize_t node_read_meminfo(struct nid, K(i.freeram - i.freehigh), nid, K(ps.nr_dirty), nid, K(ps.nr_writeback), - nid, K(ps.nr_mapped), + nid, K(vm_stat_node[nid][NR_MAPPED]), nid, K(ps.nr_slab)); n += hugetlb_report_node_meminfo(nid, buf + n); return n; Index: linux-2.6.15-rc3/fs/proc/proc_misc.c =================================================================== --- linux-2.6.15-rc3.orig/fs/proc/proc_misc.c 2005-11-28 19:51:27.000000000 -0800 +++ linux-2.6.15-rc3/fs/proc/proc_misc.c 2005-12-01 00:35:49.000000000 -0800 @@ -190,7 +190,7 @@ static int meminfo_read_proc(char *page, K(i.freeswap), K(ps.nr_dirty), K(ps.nr_writeback), - K(ps.nr_mapped), + K(vm_stat_global[NR_MAPPED]), K(ps.nr_slab), K(allowed), K(committed), Index: linux-2.6.15-rc3/mm/vmscan.c =================================================================== --- linux-2.6.15-rc3.orig/mm/vmscan.c 2005-11-28 19:51:27.000000000 -0800 +++ linux-2.6.15-rc3/mm/vmscan.c 2005-12-01 00:35:49.000000000 -0800 @@ -967,7 +967,7 @@ int try_to_free_pages(struct zone **zone } for (priority = DEF_PRIORITY; priority >= 0; priority--) { - sc.nr_mapped = read_page_state(nr_mapped); + sc.nr_mapped = vm_stat_global[NR_MAPPED]; sc.nr_scanned = 0; sc.nr_reclaimed = 0; sc.priority = priority; @@ -1056,7 +1056,7 @@ loop_again: sc.gfp_mask = GFP_KERNEL; sc.may_writepage = 0; sc.may_swap = 1; - sc.nr_mapped = read_page_state(nr_mapped); + sc.nr_mapped = vm_stat_global[NR_MAPPED]; inc_page_state(pageoutrun); @@ -1373,7 +1373,7 @@ int zone_reclaim(struct zone *zone, gfp_ sc.gfp_mask = gfp_mask; sc.may_writepage = 0; sc.may_swap = 0; - sc.nr_mapped = read_page_state(nr_mapped); + sc.nr_mapped = vm_stat_global[NR_MAPPED]; sc.nr_scanned = 0; sc.nr_reclaimed = 0; /* scan at the highest priority */ Index: linux-2.6.15-rc3/mm/page-writeback.c =================================================================== --- linux-2.6.15-rc3.orig/mm/page-writeback.c 2005-11-28 19:51:27.000000000 -0800 +++ linux-2.6.15-rc3/mm/page-writeback.c 2005-12-01 00:35:49.000000000 -0800 @@ -111,7 +111,7 @@ static void get_writeback_state(struct w { wbs->nr_dirty = read_page_state(nr_dirty); wbs->nr_unstable = read_page_state(nr_unstable); - wbs->nr_mapped = read_page_state(nr_mapped); + wbs->nr_mapped = vm_stat_global[NR_MAPPED]; wbs->nr_writeback = read_page_state(nr_writeback); } Index: linux-2.6.15-rc3/mm/page_alloc.c =================================================================== --- linux-2.6.15-rc3.orig/mm/page_alloc.c 2005-12-01 00:34:02.000000000 -0800 +++ linux-2.6.15-rc3/mm/page_alloc.c 2005-12-01 00:35:49.000000000 -0800 @@ -1400,7 +1400,7 @@ void show_free_areas(void) ps.nr_unstable, nr_free_pages(), ps.nr_slab, - ps.nr_mapped, + vm_stat_global[NR_MAPPED], ps.nr_page_table_pages); for_each_zone(zone) { Index: linux-2.6.15-rc3/mm/rmap.c =================================================================== --- linux-2.6.15-rc3.orig/mm/rmap.c 2005-11-28 19:51:27.000000000 -0800 +++ linux-2.6.15-rc3/mm/rmap.c 2005-12-01 00:35:49.000000000 -0800 @@ -454,7 +454,7 @@ void page_add_anon_rmap(struct page *pag page->index = linear_page_index(vma, address); - inc_page_state(nr_mapped); + inc_node_page_state(page_to_nid(page), NR_MAPPED); } /* else checking page index and mapping is racy */ } @@ -471,7 +471,7 @@ void page_add_file_rmap(struct page *pag BUG_ON(!pfn_valid(page_to_pfn(page))); if (atomic_inc_and_test(&page->_mapcount)) - inc_page_state(nr_mapped); + inc_node_page_state(page_to_nid(page), NR_MAPPED); } /** @@ -495,7 +495,7 @@ void page_remove_rmap(struct page *page) */ if (page_test_and_clear_dirty(page)) set_page_dirty(page); - dec_page_state(nr_mapped); + dec_node_page_state(page_to_nid(page), NR_MAPPED); } } - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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