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[PATCH] zoned vm counters: conversion of nr_dirty to per zone counter

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This makes nr_dirty a per zone counter.  Looping over all processors is
avoided during writeback state determination.

The counter aggregation for nr_dirty had to be undone in the NFS layer since
we summed up the page counts from multiple zones.  Someone more familiar with
NFS should probably review what I have done.

[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>
This commit is contained in:
Christoph Lameter 2006-06-30 01:55:39 -07:00 committed by Linus Torvalds
parent df849a1529
commit b1e7a8fd85
12 changed files with 16 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/i386/mm/pgtable.c
View File

@ -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_FILE_DIRTY));
printk(KERN_INFO "%lu pages writeback\n", ps.nr_writeback);
printk(KERN_INFO "%lu pages mapped\n", global_page_state(NR_FILE_MAPPED));
printk(KERN_INFO "%lu pages slab\n", global_page_state(NR_SLAB));

4
drivers/base/node.c
View File

@ -50,8 +50,6 @@ static ssize_t node_read_meminfo(struct sys_device * dev, char * buf)
__get_zone_counts(&active, &inactive, &free, NODE_DATA(nid));
/* 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;
@ -81,7 +79,7 @@ static ssize_t node_read_meminfo(struct sys_device * dev, char * buf)
nid, K(i.freehigh),
nid, K(i.totalram - i.totalhigh),
nid, K(i.freeram - i.freehigh),
nid, K(ps.nr_dirty),
nid, K(node_page_state(nid, NR_FILE_DIRTY)),
nid, K(ps.nr_writeback),
nid, K(node_page_state(nid, NR_FILE_PAGES)),
nid, K(node_page_state(nid, NR_FILE_MAPPED)),

2
fs/buffer.c
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@ -852,7 +852,7 @@ int __set_page_dirty_buffers(struct page *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_FILE_DIRTY);
radix_tree_tag_set(&mapping->page_tree,
page_index(page),
PAGECACHE_TAG_DIRTY);

2
fs/fs-writeback.c
View File

@ -464,7 +464,7 @@ void sync_inodes_sb(struct super_block *sb, int wait)
.range_start = 0,
.range_end = LLONG_MAX,
};
unsigned long nr_dirty = read_page_state(nr_dirty);
unsigned long nr_dirty = global_page_state(NR_FILE_DIRTY);
unsigned long nr_unstable = read_page_state(nr_unstable);
wbc.nr_to_write = nr_dirty + nr_unstable +

1
fs/nfs/pagelist.c
View File

@ -315,6 +315,7 @@ nfs_scan_lock_dirty(struct nfs_inode *nfsi, struct list_head *dst,
req->wb_index, NFS_PAGE_TAG_DIRTY);
nfs_list_remove_request(req);
nfs_list_add_request(req, dst);
dec_zone_page_state(req->wb_page, NR_FILE_DIRTY);
res++;
}
}

3
fs/nfs/write.c
View File

@ -497,7 +497,7 @@ nfs_mark_request_dirty(struct nfs_page *req)
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_FILE_DIRTY);
mark_inode_dirty(inode);
}
@ -609,7 +609,6 @@ nfs_scan_dirty(struct inode *inode, struct list_head *dst, unsigned long idx_sta
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");
}

2
fs/proc/proc_misc.c
View File

@ -190,7 +190,7 @@ static int meminfo_read_proc(char *page, char **start, off_t off,
K(i.freeram-i.freehigh),
K(i.totalswap),
K(i.freeswap),
K(ps.nr_dirty),
K(global_page_state(NR_FILE_DIRTY)),
K(ps.nr_writeback),
K(global_page_state(NR_ANON_PAGES)),
K(global_page_state(NR_FILE_MAPPED)),

1
include/linux/mmzone.h
View File

@ -53,6 +53,7 @@ enum zone_stat_item {
NR_FILE_PAGES,
NR_SLAB, /* Pages used by slab allocator */
NR_PAGETABLE, /* used for pagetables */
NR_FILE_DIRTY,
NR_VM_ZONE_STAT_ITEMS };
struct per_cpu_pages {

1
include/linux/vmstat.h
View File

@ -22,7 +22,6 @@
* commented here.
*/
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

11
mm/page-writeback.c
View File

@ -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_FILE_DIRTY);
wbs->nr_unstable = read_page_state(nr_unstable);
wbs->nr_mapped = global_page_state(NR_FILE_MAPPED) +
global_page_state(NR_ANON_PAGES);
@ -641,7 +641,8 @@ int __set_page_dirty_nobuffers(struct page *page)
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_FILE_DIRTY);
radix_tree_tag_set(&mapping->page_tree,
page_index(page), PAGECACHE_TAG_DIRTY);
}
@ -728,9 +729,9 @@ int test_clear_page_dirty(struct page *page)
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_FILE_DIRTY);
write_unlock_irqrestore(&mapping->tree_lock, flags);
return 1;
}
write_unlock_irqrestore(&mapping->tree_lock, flags);
@ -761,7 +762,7 @@ int clear_page_dirty_for_io(struct page *page)
if (mapping) {
if (TestClearPageDirty(page)) {
if (mapping_cap_account_dirty(mapping))
dec_page_state(nr_dirty);
dec_zone_page_state(page, NR_FILE_DIRTY);
return 1;
}
return 0;

2
mm/page_alloc.c
View File

@ -1314,7 +1314,7 @@ 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_FILE_DIRTY),
ps.nr_writeback,
ps.nr_unstable,
nr_free_pages(),

2
mm/vmstat.c
View File

@ -400,9 +400,9 @@ static char *vmstat_text[] = {
"nr_file_pages",
"nr_slab",
"nr_page_table_pages",
"nr_dirty",
/* Page state */
"nr_dirty",
"nr_writeback",
"nr_unstable",