linux-kernel - [PATCH] bugfix dax fault page should be no cache

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Date:	Tue, 12 Jan 2016 19:43:45 +0800
From:	<chenjie6@...wei.com>
To:	Alexander Viro <viro@...iv.linux.org.uk>,
	Matthew Wilcox <willy@...ux.intel.com>,
	<linux-fsdevel@...r.kernel.org>, <zhihui.gao@...wei.com>
CC:	<linux-kernel@...r.kernel.org>, <lizefan@...wei.com>,
	chenjie <chenjie6@...wei.com>, <stable@...r.kernel.org>
Subject: [PATCH] bugfix dax fault page should be no cache

From: chenjie <chenjie6@...wei.com>

We show the pte: 
	*pte=01600000159c8fd3
The page should be no_cache attr,it will be better. 

Cc: <stable@...r.kernel.org>
Signed-off-by: chenjie <chenjie6@...wei.com>
---
 fs/dax.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/dax.c b/fs/dax.c
index 43671b6..179ced6 100644
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -328,6 +328,8 @@ static int dax_insert_mapping(struct inode *inode, struct buffer_head *bh,
 		wmb_pmem();
 	}
 
+	vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
+
 	error = vm_insert_mixed(vma, vaddr, pfn);
 
  out:
-- 
1.8.0