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

Conversion of nr_unstable to a per zone counter

We need to do some special modifications to the nfs code since there are
multiple cases of disposition and we need to have a page ref for proper
accounting.

This converts the last critical page state of the VM and therefore we need to
remove several functions that were depending on GET_PAGE_STATE_LAST in order
to make the kernel compile again.  We are only left with event type counters
in page state.

[akpm@osdl.org: bugfixes]
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 01:55:40 -07:00 committed by Linus Torvalds
parent ce866b34ae
commit fd39fc8561
9 changed files with 11 additions and 46 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/base/node.c
View File

@ -40,13 +40,11 @@ static ssize_t node_read_meminfo(struct sys_device * dev, char * buf)
int n;
int nid = dev->id;
struct sysinfo i;
struct page_state ps;
unsigned long inactive;
unsigned long active;
unsigned long free;
si_meminfo_node(&i, nid);
get_page_state_node(&ps, nid);
__get_zone_counts(&active, &inactive, &free, NODE_DATA(nid));
@ -66,6 +64,7 @@ static ssize_t node_read_meminfo(struct sys_device * dev, char * buf)
"Node %d Mapped: %8lu kB\n"
"Node %d AnonPages: %8lu kB\n"
"Node %d PageTables: %8lu kB\n"
"Node %d NFS Unstable: %8lu kB\n"
"Node %d Slab: %8lu kB\n",
nid, K(i.totalram),
nid, K(i.freeram),
@ -82,6 +81,7 @@ static ssize_t node_read_meminfo(struct sys_device * dev, char * buf)
nid, K(node_page_state(nid, NR_FILE_MAPPED)),
nid, K(node_page_state(nid, NR_ANON_PAGES)),
nid, K(node_page_state(nid, NR_PAGETABLE)),
nid, K(node_page_state(nid, NR_UNSTABLE_NFS)),
nid, K(node_page_state(nid, NR_SLAB)));
n += hugetlb_report_node_meminfo(nid, buf + n);
return n;

2
fs/fs-writeback.c
View File

@ -465,7 +465,7 @@ void sync_inodes_sb(struct super_block *sb, int wait)
.range_end = LLONG_MAX,
};
unsigned long nr_dirty = global_page_state(NR_FILE_DIRTY);
unsigned long nr_unstable = read_page_state(nr_unstable);
unsigned long nr_unstable = global_page_state(NR_UNSTABLE_NFS);
wbc.nr_to_write = nr_dirty + nr_unstable +
(inodes_stat.nr_inodes - inodes_stat.nr_unused) +

6
fs/nfs/write.c
View File

@ -525,7 +525,7 @@ nfs_mark_request_commit(struct nfs_page *req)
nfs_list_add_request(req, &nfsi->commit);
nfsi->ncommit++;
spin_unlock(&nfsi->req_lock);
inc_page_state(nr_unstable);
inc_zone_page_state(req->wb_page, NR_UNSTABLE_NFS);
mark_inode_dirty(inode);
}
#endif
@ -1393,7 +1393,6 @@ static void nfs_commit_done(struct rpc_task *task, void *calldata)
{
struct nfs_write_data *data = calldata;
struct nfs_page *req;
int res = 0;
dprintk("NFS: %4d nfs_commit_done (status %d)\n",
task->tk_pid, task->tk_status);
@ -1405,6 +1404,7 @@ static void nfs_commit_done(struct rpc_task *task, void *calldata)
while (!list_empty(&data->pages)) {
req = nfs_list_entry(data->pages.next);
nfs_list_remove_request(req);
dec_zone_page_state(req->wb_page, NR_UNSTABLE_NFS);
dprintk("NFS: commit (%s/%Ld %d@%Ld)",
req->wb_context->dentry->d_inode->i_sb->s_id,
@ -1431,9 +1431,7 @@ static void nfs_commit_done(struct rpc_task *task, void *calldata)
nfs_mark_request_dirty(req);
next:
nfs_clear_page_writeback(req);
res++;
}
sub_page_state(nr_unstable,res);
}
static const struct rpc_call_ops nfs_commit_ops = {

4
fs/proc/proc_misc.c
View File

@ -120,7 +120,6 @@ static int meminfo_read_proc(char *page, char **start, off_t off,
{
struct sysinfo i;
int len;
struct page_state ps;
unsigned long inactive;
unsigned long active;
unsigned long free;
@ -129,7 +128,6 @@ static int meminfo_read_proc(char *page, char **start, off_t off,
struct vmalloc_info vmi;
long cached;
get_page_state(&ps);
get_zone_counts(&active, &inactive, &free);
/*
@ -172,6 +170,7 @@ static int meminfo_read_proc(char *page, char **start, off_t off,
"Mapped: %8lu kB\n"
"Slab: %8lu kB\n"
"PageTables: %8lu kB\n"
"NFS Unstable: %8lu kB\n"
"CommitLimit: %8lu kB\n"
"Committed_AS: %8lu kB\n"
"VmallocTotal: %8lu kB\n"
@ -196,6 +195,7 @@ static int meminfo_read_proc(char *page, char **start, off_t off,
K(global_page_state(NR_FILE_MAPPED)),
K(global_page_state(NR_SLAB)),
K(global_page_state(NR_PAGETABLE)),
K(global_page_state(NR_UNSTABLE_NFS)),
K(allowed),
K(committed),
(unsigned long)VMALLOC_TOTAL >> 10,

1
include/linux/mmzone.h
View File

@ -55,6 +55,7 @@ enum zone_stat_item {
NR_PAGETABLE, /* used for pagetables */
NR_FILE_DIRTY,
NR_WRITEBACK,
NR_UNSTABLE_NFS, /* NFS unstable pages */
NR_VM_ZONE_STAT_ITEMS };
struct per_cpu_pages {

9
include/linux/vmstat.h
View File

@ -22,13 +22,6 @@
* commented here.
*/
struct page_state {
unsigned long nr_unstable; /* NFS unstable pages */
#define GET_PAGE_STATE_LAST nr_unstable
/*
* The below are zeroed by get_page_state(). Use get_full_page_state()
* to add up all these.
*/
unsigned long pgpgin; /* Disk reads */
unsigned long pgpgout; /* Disk writes */
unsigned long pswpin; /* swap reads */
@ -77,8 +70,6 @@ struct page_state {
unsigned long nr_bounce; /* pages for bounce buffers */
};
extern void get_page_state(struct page_state *ret);
extern void get_page_state_node(struct page_state *ret, int node);
extern void get_full_page_state(struct page_state *ret);
extern unsigned long read_page_state_offset(unsigned long offset);
extern void mod_page_state_offset(unsigned long offset, unsigned long delta);

2
mm/page-writeback.c
View File

@ -110,7 +110,7 @@ struct writeback_state
static void get_writeback_state(struct writeback_state *wbs)
{
wbs->nr_dirty = global_page_state(NR_FILE_DIRTY);
wbs->nr_unstable = read_page_state(nr_unstable);
wbs->nr_unstable = global_page_state(NR_UNSTABLE_NFS);
wbs->nr_mapped = global_page_state(NR_FILE_MAPPED) +
global_page_state(NR_ANON_PAGES);
wbs->nr_writeback = global_page_state(NR_WRITEBACK);

4
mm/page_alloc.c
View File

@ -1271,7 +1271,6 @@ void si_meminfo_node(struct sysinfo *val, int nid)
*/
void show_free_areas(void)
{
struct page_state ps;
int cpu, temperature;
unsigned long active;
unsigned long inactive;
@ -1303,7 +1302,6 @@ void show_free_areas(void)
}
}
get_page_state(&ps);
get_zone_counts(&active, &inactive, &free);
printk("Free pages: %11ukB (%ukB HighMem)\n",
@ -1316,7 +1314,7 @@ void show_free_areas(void)
inactive,
global_page_state(NR_FILE_DIRTY),
global_page_state(NR_WRITEBACK),
ps.nr_unstable,
global_page_state(NR_UNSTABLE_NFS),
nr_free_pages(),
global_page_state(NR_SLAB),
global_page_state(NR_FILE_MAPPED),

25
mm/vmstat.c
View File

@ -45,28 +45,6 @@ static void __get_page_state(struct page_state *ret, int nr, cpumask_t *cpumask)
}
}
void get_page_state_node(struct page_state *ret, int node)
{
int nr;
cpumask_t mask = node_to_cpumask(node);
nr = offsetof(struct page_state, GET_PAGE_STATE_LAST);
nr /= sizeof(unsigned long);
__get_page_state(ret, nr+1, &mask);
}
void get_page_state(struct page_state *ret)
{
int nr;
cpumask_t mask = CPU_MASK_ALL;
nr = offsetof(struct page_state, GET_PAGE_STATE_LAST);
nr /= sizeof(unsigned long);
__get_page_state(ret, nr + 1, &mask);
}
void get_full_page_state(struct page_state *ret)
{
cpumask_t mask = CPU_MASK_ALL;
@ -402,10 +380,9 @@ static char *vmstat_text[] = {
"nr_page_table_pages",
"nr_dirty",
"nr_writeback",
/* Page state */
"nr_unstable",
/* Event counters */
"pgpgin",
"pgpgout",
"pswpin",