Techwizz/kernel-fxtec-pro1x
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

[PATCH] mm: rss = file_rss + anon_rss

Browse source 
I was lazy when we added anon_rss, and chose to change as few places as
possible.  So currently each anonymous page has to be counted twice, in rss
and in anon_rss.  Which won't be so good if those are atomic counts in some
configurations.

Change that around: keep file_rss and anon_rss separately, and add them
together (with get_mm_rss macro) when the total is needed - reading two
atomics is much cheaper than updating two atomics.  And update anon_rss
upfront, typically in memory.c, not tucked away in page_add_anon_rmap.

Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Hugh Dickins 2005-10-29 18:16:05 -07:00 committed by Linus Torvalds
parent 404351e67a
commit 4294621f41
12 changed files with 38 additions and 37 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
fs/exec.c
View file

@ -330,7 +330,7 @@ void install_arg_page(struct vm_area_struct *vma,
pte_unmap(pte);
goto out;
}
inc_mm_counter(mm, rss);
inc_mm_counter(mm, anon_rss);
lru_cache_add_active(page);
set_pte_at(mm, address, pte, pte_mkdirty(pte_mkwrite(mk_pte(
page, vma->vm_page_prot))));

2
fs/proc/array.c
View file

@ -438,7 +438,7 @@ static int do_task_stat(struct task_struct *task, char * buffer, int whole)
jiffies_to_clock_t(it_real_value),
start_time,
vsize,
mm ? get_mm_counter(mm, rss) : 0, /* you might want to shift this left 3 */
mm ? get_mm_rss(mm) : 0,
rsslim,
mm ? mm->start_code : 0,
mm ? mm->end_code : 0,

8
fs/proc/task_mmu.c
View file

@ -29,7 +29,7 @@ char *task_mem(struct mm_struct *mm, char *buffer)
"VmPTE:\t%8lu kB\n",
(mm->total_vm - mm->reserved_vm) << (PAGE_SHIFT-10),
mm->locked_vm << (PAGE_SHIFT-10),
get_mm_counter(mm, rss) << (PAGE_SHIFT-10),
get_mm_rss(mm) << (PAGE_SHIFT-10),
data << (PAGE_SHIFT-10),
mm->stack_vm << (PAGE_SHIFT-10), text, lib,
(PTRS_PER_PTE*sizeof(pte_t)*mm->nr_ptes) >> 10);
@ -44,13 +44,11 @@ unsigned long task_vsize(struct mm_struct *mm)
int task_statm(struct mm_struct *mm, int *shared, int *text,
int *data, int *resident)
{
int rss = get_mm_counter(mm, rss);
*shared = rss - get_mm_counter(mm, anon_rss);
*shared = get_mm_counter(mm, file_rss);
*text = (PAGE_ALIGN(mm->end_code) - (mm->start_code & PAGE_MASK))
>> PAGE_SHIFT;
*data = mm->total_vm - mm->shared_vm;
*resident = rss;
*resident = *shared + get_mm_counter(mm, anon_rss);
return mm->total_vm;
}

4
include/linux/sched.h
View file

@ -254,6 +254,8 @@ extern void arch_unmap_area_topdown(struct mm_struct *, unsigned long);
#define add_mm_counter(mm, member, value) (mm)->_##member += (value)
#define inc_mm_counter(mm, member) (mm)->_##member++
#define dec_mm_counter(mm, member) (mm)->_##member--
#define get_mm_rss(mm) ((mm)->_file_rss + (mm)->_anon_rss)
typedef unsigned long mm_counter_t;
struct mm_struct {
@ -286,7 +288,7 @@ struct mm_struct {
unsigned long exec_vm, stack_vm, reserved_vm, def_flags, nr_ptes;
/* Special counters protected by the page_table_lock */
mm_counter_t _rss;
mm_counter_t _file_rss;
mm_counter_t _anon_rss;
unsigned long saved_auxv[AT_VECTOR_SIZE]; /* for /proc/PID/auxv */

2
kernel/acct.c
View file

@ -553,7 +553,7 @@ void acct_update_integrals(struct task_struct *tsk)
if (delta == 0)
return;
tsk->acct_stimexpd = tsk->stime;
tsk->acct_rss_mem1 += delta * get_mm_counter(tsk->mm, rss);
tsk->acct_rss_mem1 += delta * get_mm_rss(tsk->mm);
tsk->acct_vm_mem1 += delta * tsk->mm->total_vm;
}
}

4
kernel/fork.c
View file

@ -321,7 +321,7 @@ static struct mm_struct * mm_init(struct mm_struct * mm)
INIT_LIST_HEAD(&mm->mmlist);
mm->core_waiters = 0;
mm->nr_ptes = 0;
set_mm_counter(mm, rss, 0);
set_mm_counter(mm, file_rss, 0);
set_mm_counter(mm, anon_rss, 0);
spin_lock_init(&mm->page_table_lock);
rwlock_init(&mm->ioctx_list_lock);
@ -499,7 +499,7 @@ static int copy_mm(unsigned long clone_flags, struct task_struct * tsk)
if (retval)
goto free_pt;
mm->hiwater_rss = get_mm_counter(mm,rss);
mm->hiwater_rss = get_mm_rss(mm);
mm->hiwater_vm = mm->total_vm;
good_mm:

4
mm/fremap.c
View file

@ -39,7 +39,7 @@ static inline void zap_pte(struct mm_struct *mm, struct vm_area_struct *vma,
set_page_dirty(page);
page_remove_rmap(page);
page_cache_release(page);
dec_mm_counter(mm, rss);
dec_mm_counter(mm, file_rss);
}
}
} else {
@ -95,7 +95,7 @@ int install_page(struct mm_struct *mm, struct vm_area_struct *vma,
zap_pte(mm, vma, addr, pte);
inc_mm_counter(mm,rss);
inc_mm_counter(mm, file_rss);
flush_icache_page(vma, page);
set_pte_at(mm, addr, pte, mk_pte(page, prot));
page_add_file_rmap(page);

6
mm/hugetlb.c
View file

@ -286,7 +286,7 @@ int copy_hugetlb_page_range(struct mm_struct *dst, struct mm_struct *src,
entry = *src_pte;
ptepage = pte_page(entry);
get_page(ptepage);
add_mm_counter(dst, rss, HPAGE_SIZE / PAGE_SIZE);
add_mm_counter(dst, file_rss, HPAGE_SIZE / PAGE_SIZE);
set_huge_pte_at(dst, addr, dst_pte, entry);
}
spin_unlock(&src->page_table_lock);
@ -324,7 +324,7 @@ void unmap_hugepage_range(struct vm_area_struct *vma, unsigned long start,
page = pte_page(pte);
put_page(page);
add_mm_counter(mm, rss, - (HPAGE_SIZE / PAGE_SIZE));
add_mm_counter(mm, file_rss, (int) -(HPAGE_SIZE / PAGE_SIZE));
}
flush_tlb_range(vma, start, end);
}
@ -386,7 +386,7 @@ int hugetlb_prefault(struct address_space *mapping, struct vm_area_struct *vma)
goto out;
}
}
add_mm_counter(mm, rss, HPAGE_SIZE / PAGE_SIZE);
add_mm_counter(mm, file_rss, HPAGE_SIZE / PAGE_SIZE);
set_huge_pte_at(mm, addr, pte, make_huge_pte(vma, page));
}
out:

31
mm/memory.c
View file

@ -397,9 +397,10 @@ copy_one_pte(struct mm_struct *dst_mm, struct mm_struct *src_mm,
pte = pte_mkclean(pte);
pte = pte_mkold(pte);
get_page(page);
inc_mm_counter(dst_mm, rss);
if (PageAnon(page))
inc_mm_counter(dst_mm, anon_rss);
else
inc_mm_counter(dst_mm, file_rss);
set_pte_at(dst_mm, addr, dst_pte, pte);
page_dup_rmap(page);
}
@ -581,8 +582,8 @@ static void zap_pte_range(struct mmu_gather *tlb, pmd_t *pmd,
set_page_dirty(page);
if (pte_young(ptent))
mark_page_accessed(page);
dec_mm_counter(tlb->mm, file_rss);
}
dec_mm_counter(tlb->mm, rss);
page_remove_rmap(page);
tlb_remove_page(tlb, page);
continue;
@ -1290,13 +1291,15 @@ static int do_wp_page(struct mm_struct *mm, struct vm_area_struct *vma,
spin_lock(&mm->page_table_lock);
page_table = pte_offset_map(pmd, address);
if (likely(pte_same(*page_table, orig_pte))) {
if (PageAnon(old_page))
dec_mm_counter(mm, anon_rss);
if (PageReserved(old_page))
inc_mm_counter(mm, rss);
else
inc_mm_counter(mm, anon_rss);
else {
page_remove_rmap(old_page);
if (!PageAnon(old_page)) {
inc_mm_counter(mm, anon_rss);
dec_mm_counter(mm, file_rss);
}
}
flush_cache_page(vma, address, pfn);
entry = mk_pte(new_page, vma->vm_page_prot);
entry = maybe_mkwrite(pte_mkdirty(entry), vma);
@ -1701,7 +1704,7 @@ static int do_swap_page(struct mm_struct *mm, struct vm_area_struct *vma,
/* The page isn't present yet, go ahead with the fault. */
inc_mm_counter(mm, rss);
inc_mm_counter(mm, anon_rss);
pte = mk_pte(page, vma->vm_page_prot);
if (write_access && can_share_swap_page(page)) {
pte = maybe_mkwrite(pte_mkdirty(pte), vma);
@ -1774,7 +1777,7 @@ static int do_anonymous_page(struct mm_struct *mm, struct vm_area_struct *vma,
page_cache_release(page);
goto unlock;
}
inc_mm_counter(mm, rss);
inc_mm_counter(mm, anon_rss);
entry = mk_pte(page, vma->vm_page_prot);
entry = maybe_mkwrite(pte_mkdirty(entry), vma);
lru_cache_add_active(page);
@ -1887,19 +1890,19 @@ static int do_no_page(struct mm_struct *mm, struct vm_area_struct *vma,
*/
/* Only go through if we didn't race with anybody else... */
if (pte_none(*page_table)) {
if (!PageReserved(new_page))
inc_mm_counter(mm, rss);
flush_icache_page(vma, new_page);
entry = mk_pte(new_page, vma->vm_page_prot);
if (write_access)
entry = maybe_mkwrite(pte_mkdirty(entry), vma);
set_pte_at(mm, address, page_table, entry);
if (anon) {
inc_mm_counter(mm, anon_rss);
lru_cache_add_active(new_page);
page_add_anon_rmap(new_page, vma, address);
} else
} else if (!PageReserved(new_page)) {
inc_mm_counter(mm, file_rss);
page_add_file_rmap(new_page);
}
} else {
/* One of our sibling threads was faster, back out. */
page_cache_release(new_page);
@ -2192,7 +2195,7 @@ EXPORT_SYMBOL(vmalloc_to_pfn);
void update_mem_hiwater(struct task_struct *tsk)
{
if (tsk->mm) {
unsigned long rss = get_mm_counter(tsk->mm, rss);
unsigned long rss = get_mm_rss(tsk->mm);
if (tsk->mm->hiwater_rss < rss)
tsk->mm->hiwater_rss = rss;

2
mm/nommu.c
View file

@ -1083,7 +1083,7 @@ void update_mem_hiwater(struct task_struct *tsk)
unsigned long rss;
if (likely(tsk->mm)) {
rss = get_mm_counter(tsk->mm, rss);
rss = get_mm_rss(tsk->mm);
if (tsk->mm->hiwater_rss < rss)
tsk->mm->hiwater_rss = rss;
if (tsk->mm->hiwater_vm < tsk->mm->total_vm)

8
mm/rmap.c
View file

@ -445,8 +445,6 @@ void page_add_anon_rmap(struct page *page,
{
BUG_ON(PageReserved(page));
inc_mm_counter(vma->vm_mm, anon_rss);
if (atomic_inc_and_test(&page->_mapcount)) {
struct anon_vma *anon_vma = vma->anon_vma;
@ -561,9 +559,9 @@ static int try_to_unmap_one(struct page *page, struct vm_area_struct *vma)
set_pte_at(mm, address, pte, swp_entry_to_pte(entry));
BUG_ON(pte_file(*pte));
dec_mm_counter(mm, anon_rss);
}
} else
dec_mm_counter(mm, file_rss);
dec_mm_counter(mm, rss);
page_remove_rmap(page);
page_cache_release(page);
@ -667,7 +665,7 @@ static void try_to_unmap_cluster(unsigned long cursor,
page_remove_rmap(page);
page_cache_release(page);
dec_mm_counter(mm, rss);
dec_mm_counter(mm, file_rss);
(*mapcount)--;
}

2
mm/swapfile.c
View file

@ -407,7 +407,7 @@ void free_swap_and_cache(swp_entry_t entry)
static void unuse_pte(struct vm_area_struct *vma, pte_t *pte,
unsigned long addr, swp_entry_t entry, struct page *page)
{
inc_mm_counter(vma->vm_mm, rss);
inc_mm_counter(vma->vm_mm, anon_rss);
get_page(page);
set_pte_at(vma->vm_mm, addr, pte,
pte_mkold(mk_pte(page, vma->vm_page_prot)));