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Subject[RFC3 10/14] Convert nr_dirty
Convert nr_dirty to zoned counter

This makes nr_dirty a per zone counter, so that we can determine the number of
dirty pages per node etc.

The counter aggregation for nr_dirty had to be undone in the NFS layer since
it summed up the pages from multiple zones.

Signed-off-by: Christoph Lameter <clameter@sgi.com>

Index: linux-2.6.15-rc5-mm2/mm/page_alloc.c
===================================================================
--- linux-2.6.15-rc5-mm2.orig/mm/page_alloc.c 2005-12-14 15:29:46.000000000 -0800
+++ linux-2.6.15-rc5-mm2/mm/page_alloc.c 2005-12-14 15:35:34.000000000 -0800
@@ -596,7 +596,9 @@ static int rmqueue_bulk(struct zone *zon
return i;
}

-char *stat_item_descr[NR_STAT_ITEMS] = { "mapped","pagecache", "slab", "pagetable" };
+char *stat_item_descr[NR_STAT_ITEMS] = {
+ "mapped","pagecache", "slab", "pagetable", "dirty"
+};

/*
* Manage combined zone based / global counters
@@ -1777,7 +1779,7 @@ void show_free_areas(void)
"unstable:%lu free:%u slab:%lu mapped:%lu pagetables:%lu\n",
active,
inactive,
- ps.nr_dirty,
+ global_page_state(NR_DIRTY),
ps.nr_writeback,
ps.nr_unstable,
nr_free_pages(),
Index: linux-2.6.15-rc5-mm2/include/linux/page-flags.h
===================================================================
--- linux-2.6.15-rc5-mm2.orig/include/linux/page-flags.h 2005-12-14 15:29:46.000000000 -0800
+++ linux-2.6.15-rc5-mm2/include/linux/page-flags.h 2005-12-14 15:34:57.000000000 -0800
@@ -82,7 +82,6 @@
* allowed.
*/
struct page_state {
- unsigned long nr_dirty; /* Dirty writeable pages */
unsigned long nr_writeback; /* Pages under writeback */
unsigned long nr_unstable; /* NFS unstable pages */
#define GET_PAGE_STATE_LAST nr_unstable
Index: linux-2.6.15-rc5-mm2/mm/page-writeback.c
===================================================================
--- linux-2.6.15-rc5-mm2.orig/mm/page-writeback.c 2005-12-14 14:57:29.000000000 -0800
+++ linux-2.6.15-rc5-mm2/mm/page-writeback.c 2005-12-14 15:34:57.000000000 -0800
@@ -109,7 +109,7 @@ struct writeback_state

static void get_writeback_state(struct writeback_state *wbs)
{
- wbs->nr_dirty = read_page_state(nr_dirty);
+ wbs->nr_dirty = global_page_state(NR_DIRTY);
wbs->nr_unstable = read_page_state(nr_unstable);
wbs->nr_mapped = global_page_state(NR_MAPPED);
wbs->nr_writeback = read_page_state(nr_writeback);
@@ -632,7 +632,7 @@ int __set_page_dirty_nobuffers(struct pa
if (mapping2) { /* Race with truncate? */
BUG_ON(mapping2 != mapping);
if (mapping_cap_account_dirty(mapping))
- inc_page_state(nr_dirty);
+ __inc_zone_page_state(page, NR_DIRTY);
radix_tree_tag_set(&mapping->page_tree,
page_index(page), PAGECACHE_TAG_DIRTY);
}
@@ -716,9 +716,9 @@ int test_clear_page_dirty(struct page *p
radix_tree_tag_clear(&mapping->page_tree,
page_index(page),
PAGECACHE_TAG_DIRTY);
- write_unlock_irqrestore(&mapping->tree_lock, flags);
if (mapping_cap_account_dirty(mapping))
- dec_page_state(nr_dirty);
+ __dec_zone_page_state(page, NR_DIRTY);
+ write_unlock_irqrestore(&mapping->tree_lock, flags);
return 1;
}
write_unlock_irqrestore(&mapping->tree_lock, flags);
@@ -749,7 +749,7 @@ int clear_page_dirty_for_io(struct page
if (mapping) {
if (TestClearPageDirty(page)) {
if (mapping_cap_account_dirty(mapping))
- dec_page_state(nr_dirty);
+ dec_zone_page_state(page, NR_DIRTY);
return 1;
}
return 0;
Index: linux-2.6.15-rc5-mm2/include/linux/mmzone.h
===================================================================
--- linux-2.6.15-rc5-mm2.orig/include/linux/mmzone.h 2005-12-14 15:29:46.000000000 -0800
+++ linux-2.6.15-rc5-mm2/include/linux/mmzone.h 2005-12-14 15:34:57.000000000 -0800
@@ -44,8 +44,8 @@ struct zone_padding {
#define ZONE_PADDING(name)
#endif

-enum zone_stat_item { NR_MAPPED, NR_PAGECACHE, NR_SLAB, NR_PAGETABLE };
-#define NR_STAT_ITEMS 4
+enum zone_stat_item { NR_MAPPED, NR_PAGECACHE, NR_SLAB, NR_PAGETABLE, NR_DIRTY };
+#define NR_STAT_ITEMS 5

struct per_cpu_pages {
int count; /* number of pages in the list */
Index: linux-2.6.15-rc5-mm2/drivers/base/node.c
===================================================================
--- linux-2.6.15-rc5-mm2.orig/drivers/base/node.c 2005-12-14 15:29:46.000000000 -0800
+++ linux-2.6.15-rc5-mm2/drivers/base/node.c 2005-12-14 15:34:57.000000000 -0800
@@ -53,8 +53,6 @@ static ssize_t node_read_meminfo(struct
nr[j] = node_page_state(nid, j);

/* Check for negative values in these approximate counters */
- if ((long)ps.nr_dirty < 0)
- ps.nr_dirty = 0;
if ((long)ps.nr_writeback < 0)
ps.nr_writeback = 0;

@@ -82,7 +80,7 @@ static ssize_t node_read_meminfo(struct
nid, K(i.freehigh),
nid, K(i.totalram - i.totalhigh),
nid, K(i.freeram - i.freehigh),
- nid, K(ps.nr_dirty),
+ nid, K(nr[NR_DIRTY]),
nid, K(ps.nr_writeback),
nid, K(nr[NR_MAPPED]),
nid, K(nr[NR_PAGECACHE]),
Index: linux-2.6.15-rc5-mm2/fs/fs-writeback.c
===================================================================
--- linux-2.6.15-rc5-mm2.orig/fs/fs-writeback.c 2005-12-12 09:10:33.000000000 -0800
+++ linux-2.6.15-rc5-mm2/fs/fs-writeback.c 2005-12-14 15:34:57.000000000 -0800
@@ -470,7 +470,7 @@ void sync_inodes_sb(struct super_block *
struct writeback_control wbc = {
.sync_mode = wait ? WB_SYNC_ALL : WB_SYNC_HOLD,
};
- unsigned long nr_dirty = read_page_state(nr_dirty);
+ unsigned long nr_dirty = global_page_state(NR_DIRTY);
unsigned long nr_unstable = read_page_state(nr_unstable);

wbc.nr_to_write = nr_dirty + nr_unstable +
Index: linux-2.6.15-rc5-mm2/fs/buffer.c
===================================================================
--- linux-2.6.15-rc5-mm2.orig/fs/buffer.c 2005-12-13 20:41:05.000000000 -0800
+++ linux-2.6.15-rc5-mm2/fs/buffer.c 2005-12-14 15:34:57.000000000 -0800
@@ -857,7 +857,7 @@ int __set_page_dirty_buffers(struct page
write_lock_irq(&mapping->tree_lock);
if (page->mapping) { /* Race with truncate? */
if (mapping_cap_account_dirty(mapping))
- inc_page_state(nr_dirty);
+ __inc_zone_page_state(page, NR_DIRTY);
radix_tree_tag_set(&mapping->page_tree,
page_index(page),
PAGECACHE_TAG_DIRTY);
Index: linux-2.6.15-rc5-mm2/fs/proc/proc_misc.c
===================================================================
--- linux-2.6.15-rc5-mm2.orig/fs/proc/proc_misc.c 2005-12-14 15:29:46.000000000 -0800
+++ linux-2.6.15-rc5-mm2/fs/proc/proc_misc.c 2005-12-14 15:34:57.000000000 -0800
@@ -188,7 +188,7 @@ static int meminfo_read_proc(char *page,
K(i.freeram-i.freehigh),
K(i.totalswap),
K(i.freeswap),
- K(ps.nr_dirty),
+ K(global_page_state(NR_DIRTY)),
K(ps.nr_writeback),
K(global_page_state(NR_MAPPED)),
K(global_page_state(NR_SLAB)),
Index: linux-2.6.15-rc5-mm2/arch/i386/mm/pgtable.c
===================================================================
--- linux-2.6.15-rc5-mm2.orig/arch/i386/mm/pgtable.c 2005-12-03 21:10:42.000000000 -0800
+++ linux-2.6.15-rc5-mm2/arch/i386/mm/pgtable.c 2005-12-14 15:34:57.000000000 -0800
@@ -59,7 +59,7 @@ void show_mem(void)
printk(KERN_INFO "%d pages swap cached\n", cached);

get_page_state(&ps);
- printk(KERN_INFO "%lu pages dirty\n", ps.nr_dirty);
+ printk(KERN_INFO "%lu pages dirty\n", global_page_state(NR_DIRTY));
printk(KERN_INFO "%lu pages writeback\n", ps.nr_writeback);
printk(KERN_INFO "%lu pages mapped\n", ps.nr_mapped);
printk(KERN_INFO "%lu pages slab\n", ps.nr_slab);
Index: linux-2.6.15-rc5-mm2/fs/reiser4/page_cache.c
===================================================================
--- linux-2.6.15-rc5-mm2.orig/fs/reiser4/page_cache.c 2005-12-12 09:10:33.000000000 -0800
+++ linux-2.6.15-rc5-mm2/fs/reiser4/page_cache.c 2005-12-14 15:34:57.000000000 -0800
@@ -470,7 +470,7 @@ int set_page_dirty_internal(struct page

if (!TestSetPageDirty(page)) {
if (mapping_cap_account_dirty(mapping))
- inc_page_state(nr_dirty);
+ inc_zone_page_state(page, NR_DIRTY);

__mark_inode_dirty(mapping->host, I_DIRTY_PAGES);
}
Index: linux-2.6.15-rc5-mm2/fs/nfs/write.c
===================================================================
--- linux-2.6.15-rc5-mm2.orig/fs/nfs/write.c 2005-12-12 09:10:33.000000000 -0800
+++ linux-2.6.15-rc5-mm2/fs/nfs/write.c 2005-12-14 15:34:57.000000000 -0800
@@ -446,7 +446,7 @@ nfs_mark_request_dirty(struct nfs_page *
nfs_list_add_request(req, &nfsi->dirty);
nfsi->ndirty++;
spin_unlock(&nfsi->req_lock);
- inc_page_state(nr_dirty);
+ inc_zone_page_state(req->wb_page, NR_DIRTY);
mark_inode_dirty(inode);
}

@@ -539,7 +539,6 @@ nfs_scan_dirty(struct inode *inode, stru
if (nfsi->ndirty != 0) {
res = nfs_scan_lock_dirty(nfsi, dst, idx_start, npages);
nfsi->ndirty -= res;
- sub_page_state(nr_dirty,res);
if ((nfsi->ndirty == 0) != list_empty(&nfsi->dirty))
printk(KERN_ERR "NFS: desynchronized value of nfs_i.ndirty.\n");
}
Index: linux-2.6.15-rc5-mm2/fs/reiser4/emergency_flush.c
===================================================================
--- linux-2.6.15-rc5-mm2.orig/fs/reiser4/emergency_flush.c 2005-12-12 09:10:33.000000000 -0800
+++ linux-2.6.15-rc5-mm2/fs/reiser4/emergency_flush.c 2005-12-14 15:34:57.000000000 -0800
@@ -740,7 +740,7 @@ void eflush_del(jnode * node, int page_l
if (!TestSetPageDirty(page)) {
BUG_ON(jnode_get_mapping(node) != page->mapping);
if (mapping_cap_account_dirty(page->mapping))
- inc_page_state(nr_dirty);
+ inc_zone_page_state(page, NR_DIRTY);
}

assert("nikita-2766", atomic_read(&node->x_count) > 1);
Index: linux-2.6.15-rc5-mm2/fs/reiser4/as_ops.c
===================================================================
--- linux-2.6.15-rc5-mm2.orig/fs/reiser4/as_ops.c 2005-12-12 09:10:33.000000000 -0800
+++ linux-2.6.15-rc5-mm2/fs/reiser4/as_ops.c 2005-12-14 15:34:57.000000000 -0800
@@ -84,7 +84,7 @@ int reiser4_set_page_dirty(struct page *
if (page->mapping) {
assert("vs-1652", page->mapping == mapping);
if (mapping_cap_account_dirty(mapping))
- inc_page_state(nr_dirty);
+ __inc_zone_page_state(page, NR_DIRTY);
radix_tree_tag_set(&mapping->page_tree,
page->index,
PAGECACHE_TAG_REISER4_MOVED);
Index: linux-2.6.15-rc5-mm2/mm/swap_prefetch.c
===================================================================
--- linux-2.6.15-rc5-mm2.orig/mm/swap_prefetch.c 2005-12-14 15:29:13.000000000 -0800
+++ linux-2.6.15-rc5-mm2/mm/swap_prefetch.c 2005-12-14 15:34:57.000000000 -0800
@@ -319,7 +319,7 @@ static int prefetch_suitable(void)
goto out;

/* Delay prefetching if we have significant amounts of dirty data */
- pending_writes = ps.nr_dirty + ps.nr_unstable;
+ pending_writes = global_page_state(NR_DIRTY) + ps.nr_unstable;
if (pending_writes > SWAP_CLUSTER_MAX)
goto out;

Index: linux-2.6.15-rc5-mm2/fs/nfs/pagelist.c
===================================================================
--- linux-2.6.15-rc5-mm2.orig/fs/nfs/pagelist.c 2005-12-03 21:10:42.000000000 -0800
+++ linux-2.6.15-rc5-mm2/fs/nfs/pagelist.c 2005-12-14 15:34:57.000000000 -0800
@@ -309,6 +309,7 @@ nfs_scan_lock_dirty(struct nfs_inode *nf
req->wb_index, NFS_PAGE_TAG_DIRTY);
nfs_list_remove_request(req);
nfs_list_add_request(req, dst);
+ inc_zone_page_state(req->wb_page, NR_DIRTY);
res++;
}
}
-
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