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| author | Christoph Lameter <clameter@sgi.com> | 2006-06-23 02:03:38 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-06-23 07:42:51 -0700 |
| commit | 442c9137de8d769053e81d325709dca72f0b5e44 (patch) | |
| tree | 200e5ace0310755d88dd1c7597cc0bb540264fe1 /mm | |
| parent | 6c5240ae7f48c83fcaa8e24fa63e7eb09aba5651 (diff) | |
| download | linux-3.10-442c9137de8d769053e81d325709dca72f0b5e44.tar.gz linux-3.10-442c9137de8d769053e81d325709dca72f0b5e44.tar.bz2 linux-3.10-442c9137de8d769053e81d325709dca72f0b5e44.zip | |
[PATCH] More page migration: do not inc/dec rss counters
If we install a migration entry then the rss not really decreases since the
page is just moved somewhere else. We can save ourselves the work of
decrementing and later incrementing which will just eventually cause cacheline
bouncing.
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/migrate.c | 1 | ||||
| -rw-r--r-- | mm/rmap.c | 2 |
2 files changed, 1 insertions, 2 deletions
diff --git a/mm/migrate.c b/mm/migrate.c index 8f91463eab4..96b9546e69e 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -164,7 +164,6 @@ static void remove_migration_pte(struct vm_area_struct *vma, unsigned long addr, if (!is_migration_entry(entry) || migration_entry_to_page(entry) != old) goto out; - inc_mm_counter(mm, anon_rss); get_page(new); pte = pte_mkold(mk_pte(new, vma->vm_page_prot)); if (is_write_migration_entry(entry)) diff --git a/mm/rmap.c b/mm/rmap.c index a53a10b93ec..05d6d73a692 100644 --- a/mm/rmap.c +++ b/mm/rmap.c @@ -595,6 +595,7 @@ static int try_to_unmap_one(struct page *page, struct vm_area_struct *vma, list_add(&mm->mmlist, &init_mm.mmlist); spin_unlock(&mmlist_lock); } + dec_mm_counter(mm, anon_rss); } else { /* * Store the pfn of the page in a special migration @@ -606,7 +607,6 @@ 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); |