From: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
To: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Andrea Arcangeli <aarcange@redhat.com>,
Hugh Dickins <hughd@google.com>,
David Rientjes <rientjes@google.com>,
LKML <linux-kernel@vger.kernel.org>,
Linux Memory Management List <linux-mm@kvack.org>
Subject: [PATCH 08/12] thp: release page in page pre-alloc path
Date: Mon, 13 Aug 2012 19:16:02 +0800 [thread overview]
Message-ID: <5028E1F2.5070407@linux.vnet.ibm.com> (raw)
In-Reply-To: <5028E12C.70101@linux.vnet.ibm.com>
If NUMA is enabled, we can release the page in the page pre-alloc operation,
then the CONFIG_NUMA dependent code can be reduced
Signed-off-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
---
mm/huge_memory.c | 19 +++++++------------
1 files changed, 7 insertions(+), 12 deletions(-)
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 42d3d74..050b8d0 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -1879,15 +1879,12 @@ static void collapse_huge_page(struct mm_struct *mm,
*hpage = ERR_PTR(-ENOMEM);
return;
}
+ *hpage = new_page;
count_vm_event(THP_COLLAPSE_ALLOC);
#endif
- if (unlikely(mem_cgroup_newpage_charge(new_page, mm, GFP_KERNEL))) {
-#ifdef CONFIG_NUMA
- put_page(new_page);
-#endif
+ if (unlikely(mem_cgroup_newpage_charge(new_page, mm, GFP_KERNEL)))
return;
- }
/*
* Prevent all access to pagetables with the exception of
@@ -1992,9 +1989,8 @@ static void collapse_huge_page(struct mm_struct *mm,
prepare_pmd_huge_pte(pgtable, mm);
spin_unlock(&mm->page_table_lock);
-#ifndef CONFIG_NUMA
*hpage = NULL;
-#endif
+
khugepaged_pages_collapsed++;
out_up_write:
up_write(&mm->mmap_sem);
@@ -2002,9 +1998,6 @@ out_up_write:
out:
mem_cgroup_uncharge_page(new_page);
-#ifdef CONFIG_NUMA
- put_page(new_page);
-#endif
goto out_up_write;
}
@@ -2275,8 +2268,6 @@ static void khugepaged_do_scan(void)
barrier(); /* write khugepaged_pages_to_scan to local stack */
while (progress < pages) {
- cond_resched();
-
#ifndef CONFIG_NUMA
if (!hpage)
hpage = khugepaged_alloc_hugepage(&wait);
@@ -2289,8 +2280,12 @@ static void khugepaged_do_scan(void)
break;
wait = false;
khugepaged_alloc_sleep();
+ } else if (hpage) {
+ put_page(hpage);
+ hpage = NULL;
}
#endif
+ cond_resched();
if (unlikely(kthread_should_stop() || freezing(current)))
break;
--
1.7.7.6
--
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next prev parent reply other threads:[~2012-08-13 11:16 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-13 11:12 [PATCH 00/12] thp: optimize use of khugepaged_mutex and dependence of CONFIG_NUMA Xiao Guangrong
2012-08-13 11:13 ` [PATCH 01/12] thp: fix the count of THP_COLLAPSE_ALLOC Xiao Guangrong
2012-08-13 11:19 ` Kirill A. Shutemov
2012-08-13 11:13 ` [PATCH 02/12] thp: remove unnecessary check in start_khugepaged Xiao Guangrong
2012-08-13 11:14 ` [PATCH 03/12] thp: move khugepaged_mutex out of khugepaged Xiao Guangrong
2012-08-13 11:14 ` [PATCH 04/12] thp: remove unnecessary khugepaged_thread check Xiao Guangrong
2012-08-13 11:14 ` [PATCH 05/12] thp: remove wake_up_interruptible in the exit path Xiao Guangrong
2012-08-13 11:15 ` [PATCH 06/12] thp: remove some code depend on CONFIG_NUMA Xiao Guangrong
2012-08-13 11:15 ` [PATCH 07/12] thp: merge page pre-alloc in khugepaged_loop into khugepaged_do_scan Xiao Guangrong
2012-08-13 11:16 ` Xiao Guangrong [this message]
2012-08-13 11:16 ` [PATCH 09/12] thp: introduce khugepaged_prealloc_page and khugepaged_alloc_page Xiao Guangrong
2012-09-12 2:03 ` Hugh Dickins
2012-09-12 2:35 ` Xiao Guangrong
2012-09-12 3:37 ` Xiao Guangrong
2012-09-13 6:27 ` Hugh Dickins
2012-09-13 6:33 ` Hugh Dickins
2012-09-13 9:26 ` Xiao Guangrong
2012-08-13 11:16 ` [PATCH 10/12] thp: remove khugepaged_loop Xiao Guangrong
2012-08-13 11:17 ` [PATCH 11/12] thp: use khugepaged_enabled to remove duplicate code Xiao Guangrong
2012-08-13 11:17 ` [PATCH 12/12] thp: remove unnecessary set_recommended_min_free_kbytes Xiao Guangrong
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