The patch titled
More page migration: do not inc/dec rss counters
has been added to the -mm tree. Its filename is
more-page-migration-do-not-inc-dec-rss-counters.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
From: Christoph Lameter <clameter@xxxxxxx>
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@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
mm/migrate.c | 1 -
mm/rmap.c | 2 +-
2 files changed, 1 insertion(+), 2 deletions(-)
diff -puN mm/migrate.c~more-page-migration-do-not-inc-dec-rss-counters mm/migrate.c
--- devel/mm/migrate.c~more-page-migration-do-not-inc-dec-rss-counters 2006-04-29 00:20:58.000000000 -0700
+++ devel-akpm/mm/migrate.c 2006-04-29 00:20:58.000000000 -0700
@@ -165,7 +165,6 @@ static void remove_migration_pte(struct
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 -puN mm/rmap.c~more-page-migration-do-not-inc-dec-rss-counters mm/rmap.c
--- devel/mm/rmap.c~more-page-migration-do-not-inc-dec-rss-counters 2006-04-29 00:20:58.000000000 -0700
+++ devel-akpm/mm/rmap.c 2006-04-29 00:20:58.000000000 -0700
@@ -595,6 +595,7 @@ static int try_to_unmap_one(struct page
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
}
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);
_
Patches currently in -mm which might be from clameter@xxxxxxx are
origin.patch
page-migration-fix-fallback-behavior-for-dirty-pages.patch
page-migration-make-do_swap_page-redo-the-fault.patch
slab-extract-cache_free_alien-from-__cache_free.patch
migration-remove-unnecessary-pageswapcache-checks.patch
page-migration-cleanup-rename-ignrefs-to-migration.patch
page-migration-cleanup-group-functions.patch
page-migration-cleanup-remove-useless-definitions.patch
page-migration-cleanup-drop-nr_refs-in-remove_references.patch
page-migration-cleanup-extract-try_to_unmap-from-migration-functions.patch
page-migration-cleanup-pass-mapping-to-migration-functions.patch
page-migration-cleanup-move-fallback-handling-into-special-function.patch
swapless-pm-add-r-w-migration-entries.patch
swapless-page-migration-rip-out-swap-based-logic.patch
swapless-page-migration-modify-core-logic.patch
more-page-migration-do-not-inc-dec-rss-counters.patch
more-page-migration-use-migration-entries-for-file-pages.patch
-
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