summaryrefslogtreecommitdiffstats
path: root/fs
diff options
context:
space:
mode:
authorHugh Dickins <hugh@veritas.com>2005-10-29 18:16:05 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2005-10-29 21:40:38 -0700
commit4294621f41a85497019fae64341aa5351a1921b7 (patch)
treefdeb7eb44384a99d0679ffa6de5019bab0ea2166 /fs
parent404351e67a9facb475abf1492245374a28d13e90 (diff)
downloadop-kernel-dev-4294621f41a85497019fae64341aa5351a1921b7.zip
op-kernel-dev-4294621f41a85497019fae64341aa5351a1921b7.tar.gz
[PATCH] mm: rss = file_rss + anon_rss
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>
Diffstat (limited to 'fs')
-rw-r--r--fs/exec.c2
-rw-r--r--fs/proc/array.c2
-rw-r--r--fs/proc/task_mmu.c8
3 files changed, 5 insertions, 7 deletions
diff --git a/fs/exec.c b/fs/exec.c
index d2208f7..cefadf5 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -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))));
diff --git a/fs/proc/array.c b/fs/proc/array.c
index d84eeca..3e1239e 100644
--- a/fs/proc/array.c
+++ b/fs/proc/array.c
@@ -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,
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index 994612b..bccee7c 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -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;
}
OpenPOWER on IntegriCloud