From: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
To: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Hugh Dickins <hughd@google.com>,
Linux Memory Management List <linux-mm@kvack.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: [PATCH 1/3] thp: fix forgetting to reset the page alloc indicator
Date: Wed, 12 Sep 2012 20:56:06 +0800 [thread overview]
Message-ID: <50508666.90605@linux.vnet.ibm.com> (raw)
In-Reply-To: <50508632.9090003@linux.vnet.ibm.com>
If NUMA is enabled, the indicator is not reset if the previous page
request is failed, then it will trigger the VM_BUG_ON in khugepaged_alloc_page
Signed-off-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
---
mm/huge_memory.c | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index e366ca5..66d2bc6 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -1825,6 +1825,7 @@ static bool khugepaged_prealloc_page(struct page **hpage, bool *wait)
return false;
*wait = false;
+ *hpage = NULL;
khugepaged_alloc_sleep();
} else if (*hpage) {
put_page(*hpage);
--
1.7.7.6
--
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WARNING: multiple messages have this Message-ID (diff)
From: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
To: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Hugh Dickins <hughd@google.com>,
Linux Memory Management List <linux-mm@kvack.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: [PATCH 1/3] thp: fix forgetting to reset the page alloc indicator
Date: Wed, 12 Sep 2012 20:56:06 +0800 [thread overview]
Message-ID: <50508666.90605@linux.vnet.ibm.com> (raw)
In-Reply-To: <50508632.9090003@linux.vnet.ibm.com>
If NUMA is enabled, the indicator is not reset if the previous page
request is failed, then it will trigger the VM_BUG_ON in khugepaged_alloc_page
Signed-off-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
---
mm/huge_memory.c | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index e366ca5..66d2bc6 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -1825,6 +1825,7 @@ static bool khugepaged_prealloc_page(struct page **hpage, bool *wait)
return false;
*wait = false;
+ *hpage = NULL;
khugepaged_alloc_sleep();
} else if (*hpage) {
put_page(*hpage);
--
1.7.7.6
next prev parent reply other threads:[~2012-09-12 12:56 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-12 12:55 [PATCH 0/3] thp: tidy and fix khugepaged_prealloc_page Xiao Guangrong
2012-09-12 12:55 ` Xiao Guangrong
2012-09-12 12:56 ` Xiao Guangrong [this message]
2012-09-12 12:56 ` [PATCH 1/3] thp: fix forgetting to reset the page alloc indicator Xiao Guangrong
2012-09-12 12:56 ` [PATCH 2/3] thp: move release mmap_sem lock out of khugepaged_alloc_page Xiao Guangrong
2012-09-12 12:56 ` Xiao Guangrong
2012-09-12 22:18 ` Andrew Morton
2012-09-12 22:18 ` Andrew Morton
2012-09-13 9:16 ` Xiao Guangrong
2012-09-13 9:16 ` Xiao Guangrong
2012-09-12 12:57 ` [PATCH 3/3] thp: introduce khugepaged_cleanup_page Xiao Guangrong
2012-09-12 12:57 ` Xiao Guangrong
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