From: <zhouxianrong@huawei.com>
To: <linux-mm@kvack.org>
Cc: <akpm@linux-foundation.org>, <hughd@google.com>,
<aarcange@redhat.com>, <kirill.shutemov@linux.intel.com>,
<dave.hansen@linux.intel.com>, <zhouchengming1@huawei.com>,
<geliangtang@163.com>, <zhouxianrong@huawei.com>,
<linux-kernel@vger.kernel.org>, <zhouxiyu@huawei.com>,
<wanghaijun5@huawei.com>
Subject: [PATCH v2] more mapcount page as kpage could reduce total replacement times than fewer mapcount one in probability.
Date: Wed, 15 Jun 2016 09:56:58 +0800 [thread overview]
Message-ID: <1465955818-101898-1-git-send-email-zhouxianrong@huawei.com> (raw)
From: z00281421 <z00281421@notesmail.huawei.com>
more mapcount page as kpage could reduce total replacement times
than fewer mapcount one when ksmd scan and replace among
forked pages later.
Signed-off-by: z00281421 <z00281421@notesmail.huawei.com>
---
mm/ksm.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/mm/ksm.c b/mm/ksm.c
index 4786b41..4d530af 100644
--- a/mm/ksm.c
+++ b/mm/ksm.c
@@ -1094,6 +1094,14 @@ static struct page *try_to_merge_two_pages(struct rmap_item *rmap_item,
{
int err;
+ /*
+ * select more mapcount page as kpage
+ */
+ if (page_mapcount(page) < page_mapcount(tree_page)) {
+ swap(page, tree_page);
+ swap(rmap_item, tree_rmap_item);
+ }
+
err = try_to_merge_with_ksm_page(rmap_item, page, NULL);
if (!err) {
err = try_to_merge_with_ksm_page(tree_rmap_item,
--
1.7.9.5
WARNING: multiple messages have this Message-ID (diff)
From: <zhouxianrong@huawei.com>
To: linux-mm@kvack.org
Cc: akpm@linux-foundation.org, hughd@google.com, aarcange@redhat.com,
kirill.shutemov@linux.intel.com, dave.hansen@linux.intel.com,
zhouchengming1@huawei.com, geliangtang@163.com,
zhouxianrong@huawei.com, linux-kernel@vger.kernel.org,
zhouxiyu@huawei.com, wanghaijun5@huawei.com
Subject: [PATCH v2] more mapcount page as kpage could reduce total replacement times than fewer mapcount one in probability.
Date: Wed, 15 Jun 2016 09:56:58 +0800 [thread overview]
Message-ID: <1465955818-101898-1-git-send-email-zhouxianrong@huawei.com> (raw)
From: z00281421 <z00281421@notesmail.huawei.com>
more mapcount page as kpage could reduce total replacement times
than fewer mapcount one when ksmd scan and replace among
forked pages later.
Signed-off-by: z00281421 <z00281421@notesmail.huawei.com>
---
mm/ksm.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/mm/ksm.c b/mm/ksm.c
index 4786b41..4d530af 100644
--- a/mm/ksm.c
+++ b/mm/ksm.c
@@ -1094,6 +1094,14 @@ static struct page *try_to_merge_two_pages(struct rmap_item *rmap_item,
{
int err;
+ /*
+ * select more mapcount page as kpage
+ */
+ if (page_mapcount(page) < page_mapcount(tree_page)) {
+ swap(page, tree_page);
+ swap(rmap_item, tree_rmap_item);
+ }
+
err = try_to_merge_with_ksm_page(rmap_item, page, NULL);
if (!err) {
err = try_to_merge_with_ksm_page(tree_rmap_item,
--
1.7.9.5
--
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next reply other threads:[~2016-06-15 2:00 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-15 1:56 zhouxianrong [this message]
2016-06-15 1:56 ` [PATCH v2] more mapcount page as kpage could reduce total replacement times than fewer mapcount one in probability zhouxianrong
2016-06-21 1:57 ` zhouxianrong
2016-06-21 1:57 ` zhouxianrong
2016-06-22 1:39 ` Hugh Dickins
2016-06-22 1:39 ` Hugh Dickins
2016-06-22 11:00 ` zhouxianrong
2016-06-22 11:00 ` zhouxianrong
2016-07-20 1:03 ` Hugh Dickins
2016-07-20 1:03 ` Hugh Dickins
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