From: Minchan Kim <minchan@kernel.org>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
jlayton@poochiereds.net, bfields@fieldses.org,
Vlastimil Babka <vbabka@suse.cz>,
Joonsoo Kim <iamjoonsoo.kim@lge.com>,
koct9i@gmail.com, aquini@redhat.com,
virtualization@lists.linux-foundation.org,
Mel Gorman <mgorman@suse.de>, Hugh Dickins <hughd@google.com>,
Sergey Senozhatsky <sergey.senozhatsky@gmail.com>,
Rik van Riel <riel@redhat.com>,
rknize@motorola.com, Gioh Kim <gi-oh.kim@profitbricks.com>,
Sangseok Lee <sangseok.lee@lge.com>,
Chan Gyun Jeong <chan.jeong@lge.com>,
Al Viro <viro@ZenIV.linux.org.uk>,
YiPing Xu <xuyiping@hisilicon.com>,
Minchan Kim <minchan@kernel.org>
Subject: [PATCH v3 05/16] zsmalloc: keep max_object in size_class
Date: Wed, 30 Mar 2016 16:12:04 +0900 [thread overview]
Message-ID: <1459321935-3655-6-git-send-email-minchan@kernel.org> (raw)
In-Reply-To: <1459321935-3655-1-git-send-email-minchan@kernel.org>
Every zspage in a size_class has same number of max objects so
we could move it to a size_class.
Signed-off-by: Minchan Kim <minchan@kernel.org>
---
mm/zsmalloc.c | 32 +++++++++++++++-----------------
1 file changed, 15 insertions(+), 17 deletions(-)
diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
index a0890e9003e2..8649d0243e6c 100644
--- a/mm/zsmalloc.c
+++ b/mm/zsmalloc.c
@@ -32,8 +32,6 @@
* page->freelist: points to the first free object in zspage.
* Free objects are linked together using in-place
* metadata.
- * page->objects: maximum number of objects we can store in this
- * zspage (class->zspage_order * PAGE_SIZE / class->size)
* page->lru: links together first pages of various zspages.
* Basically forming list of zspages in a fullness group.
* page->mapping: class index and fullness group of the zspage
@@ -211,6 +209,7 @@ struct size_class {
* of ZS_ALIGN.
*/
int size;
+ int objs_per_zspage;
unsigned int index;
struct zs_size_stat stats;
@@ -627,21 +626,22 @@ static inline void zs_pool_stat_destroy(struct zs_pool *pool)
* the pool (not yet implemented). This function returns fullness
* status of the given page.
*/
-static enum fullness_group get_fullness_group(struct page *first_page)
+static enum fullness_group get_fullness_group(struct size_class *class,
+ struct page *first_page)
{
- int inuse, max_objects;
+ int inuse, objs_per_zspage;
enum fullness_group fg;
VM_BUG_ON_PAGE(!is_first_page(first_page), first_page);
inuse = first_page->inuse;
- max_objects = first_page->objects;
+ objs_per_zspage = class->objs_per_zspage;
if (inuse == 0)
fg = ZS_EMPTY;
- else if (inuse == max_objects)
+ else if (inuse == objs_per_zspage)
fg = ZS_FULL;
- else if (inuse <= 3 * max_objects / fullness_threshold_frac)
+ else if (inuse <= 3 * objs_per_zspage / fullness_threshold_frac)
fg = ZS_ALMOST_EMPTY;
else
fg = ZS_ALMOST_FULL;
@@ -728,7 +728,7 @@ static enum fullness_group fix_fullness_group(struct size_class *class,
enum fullness_group currfg, newfg;
get_zspage_mapping(first_page, &class_idx, &currfg);
- newfg = get_fullness_group(first_page);
+ newfg = get_fullness_group(class, first_page);
if (newfg == currfg)
goto out;
@@ -1008,9 +1008,6 @@ static struct page *alloc_zspage(struct size_class *class, gfp_t flags)
init_zspage(class, first_page);
first_page->freelist = location_to_obj(first_page, 0);
- /* Maximum number of objects we can store in this zspage */
- first_page->objects = class->pages_per_zspage * PAGE_SIZE / class->size;
-
error = 0; /* Success */
cleanup:
@@ -1238,11 +1235,11 @@ static bool can_merge(struct size_class *prev, int size, int pages_per_zspage)
return true;
}
-static bool zspage_full(struct page *first_page)
+static bool zspage_full(struct size_class *class, struct page *first_page)
{
VM_BUG_ON_PAGE(!is_first_page(first_page), first_page);
- return first_page->inuse == first_page->objects;
+ return first_page->inuse == class->objs_per_zspage;
}
unsigned long zs_get_total_pages(struct zs_pool *pool)
@@ -1628,7 +1625,7 @@ static int migrate_zspage(struct zs_pool *pool, struct size_class *class,
}
/* Stop if there is no more space */
- if (zspage_full(d_page)) {
+ if (zspage_full(class, d_page)) {
unpin_tag(handle);
ret = -ENOMEM;
break;
@@ -1687,7 +1684,7 @@ static enum fullness_group putback_zspage(struct zs_pool *pool,
{
enum fullness_group fullness;
- fullness = get_fullness_group(first_page);
+ fullness = get_fullness_group(class, first_page);
insert_zspage(class, fullness, first_page);
set_zspage_mapping(first_page, class->index, fullness);
@@ -1936,8 +1933,9 @@ struct zs_pool *zs_create_pool(const char *name, gfp_t flags)
class->size = size;
class->index = i;
class->pages_per_zspage = pages_per_zspage;
- if (pages_per_zspage == 1 &&
- get_maxobj_per_zspage(size, pages_per_zspage) == 1)
+ class->objs_per_zspage = class->pages_per_zspage *
+ PAGE_SIZE / class->size;
+ if (pages_per_zspage == 1 && class->objs_per_zspage == 1)
class->huge = true;
spin_lock_init(&class->lock);
pool->size_class[i] = class;
--
1.9.1
next prev parent reply other threads:[~2016-03-30 7:10 UTC|newest]
Thread overview: 65+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-30 7:11 [PATCH v3 00/16] Support non-lru page migration Minchan Kim
2016-03-30 7:12 ` [PATCH v3 01/16] mm: use put_page to free page instead of putback_lru_page Minchan Kim
2016-04-01 12:58 ` Vlastimil Babka
2016-04-04 1:39 ` Minchan Kim
2016-04-04 4:45 ` Naoya Horiguchi
2016-04-04 14:46 ` Vlastimil Babka
2016-04-05 1:54 ` Naoya Horiguchi
2016-04-05 8:20 ` Vlastimil Babka
2016-04-06 0:54 ` Naoya Horiguchi
2016-04-06 7:57 ` Vlastimil Babka
2016-04-04 5:53 ` Balbir Singh
2016-04-04 6:01 ` Minchan Kim
2016-04-05 3:10 ` Balbir Singh
2016-03-30 7:12 ` [PATCH v3 02/16] mm/compaction: support non-lru movable page migration Minchan Kim
2016-04-01 21:29 ` Vlastimil Babka
2016-04-04 5:12 ` Minchan Kim
2016-04-04 13:24 ` Vlastimil Babka
2016-04-07 2:35 ` Minchan Kim
2016-04-12 8:00 ` Chulmin Kim
2016-04-12 14:25 ` Minchan Kim
2016-03-30 7:12 ` [PATCH v3 03/16] mm: add non-lru movable page support document Minchan Kim
2016-04-01 14:38 ` Vlastimil Babka
2016-04-04 2:25 ` Minchan Kim
2016-04-04 13:09 ` Vlastimil Babka
2016-04-07 2:27 ` Minchan Kim
2016-03-30 7:12 ` [PATCH v3 04/16] mm/balloon: use general movable page feature into balloon Minchan Kim
2016-04-05 12:03 ` Vlastimil Babka
2016-04-11 4:29 ` Minchan Kim
2016-03-30 7:12 ` Minchan Kim [this message]
2016-04-17 15:08 ` [PATCH v3 05/16] zsmalloc: keep max_object in size_class Sergey Senozhatsky
2016-03-30 7:12 ` [PATCH v3 06/16] zsmalloc: squeeze inuse into page->mapping Minchan Kim
2016-04-17 15:08 ` Sergey Senozhatsky
2016-04-19 7:40 ` Minchan Kim
2016-03-30 7:12 ` [PATCH v3 07/16] zsmalloc: remove page_mapcount_reset Minchan Kim
2016-04-17 15:11 ` Sergey Senozhatsky
2016-03-30 7:12 ` [PATCH v3 08/16] zsmalloc: squeeze freelist into page->mapping Minchan Kim
2016-04-17 15:56 ` Sergey Senozhatsky
2016-04-19 7:42 ` Minchan Kim
2016-03-30 7:12 ` [PATCH v3 09/16] zsmalloc: move struct zs_meta from mapping to freelist Minchan Kim
2016-04-17 15:22 ` Sergey Senozhatsky
2016-03-30 7:12 ` [PATCH v3 10/16] zsmalloc: factor page chain functionality out Minchan Kim
2016-04-18 0:33 ` Sergey Senozhatsky
2016-04-19 7:46 ` Minchan Kim
2016-03-30 7:12 ` [PATCH v3 11/16] zsmalloc: separate free_zspage from putback_zspage Minchan Kim
2016-04-18 1:04 ` Sergey Senozhatsky
2016-04-19 7:51 ` Minchan Kim
2016-04-19 7:53 ` Sergey Senozhatsky
2016-03-30 7:12 ` [PATCH v3 12/16] zsmalloc: zs_compact refactoring Minchan Kim
2016-04-04 8:04 ` Chulmin Kim
2016-04-04 9:01 ` Minchan Kim
2016-03-30 7:12 ` [PATCH v3 13/16] zsmalloc: migrate head page of zspage Minchan Kim
2016-04-06 13:01 ` Chulmin Kim
2016-04-07 0:34 ` Chulmin Kim
2016-04-07 0:43 ` Minchan Kim
2016-04-19 6:08 ` Chulmin Kim
2016-04-19 6:15 ` Minchan Kim
2016-03-30 7:12 ` [PATCH v3 14/16] zsmalloc: use single linked list for page chain Minchan Kim
2016-03-30 7:12 ` [PATCH v3 15/16] zsmalloc: migrate tail pages in zspage Minchan Kim
2016-03-30 7:12 ` [PATCH v3 16/16] zram: use __GFP_MOVABLE for memory allocation Minchan Kim
2016-03-30 23:11 ` [PATCH v3 00/16] Support non-lru page migration Andrew Morton
2016-03-31 0:29 ` Sergey Senozhatsky
2016-03-31 0:57 ` Minchan Kim
2016-03-31 0:57 ` Minchan Kim
2016-04-04 13:17 ` John Einar Reitan
2016-04-11 4:35 ` Minchan Kim
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