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

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Message-ID: <20160112125131.GB8945@linux.intel.com>
Date:	Tue, 12 Jan 2016 07:51:31 -0500
From:	Matthew Wilcox <willy@...ux.intel.com>
To:	chenjie6@...wei.com
Cc:	Alexander Viro <viro@...iv.linux.org.uk>,
	linux-fsdevel@...r.kernel.org, zhihui.gao@...wei.com,
	linux-kernel@...r.kernel.org, lizefan@...wei.com,
	stable@...r.kernel.org
Subject: Re: [PATCH] bugfix dax fault page should be no cache

On Tue, Jan 12, 2016 at 07:43:45PM +0800, chenjie6@...wei.com wrote:
> From: chenjie <chenjie6@...wei.com>
> 
> We show the pte: 
> 	*pte=01600000159c8fd3
> The page should be no_cache attr,it will be better. 

I disagree.  What data do you have to show that the WC attribute would
be better than WB?

Even if we agree to that, this is the wrong place to change that
attribute, so the patch is NAKed.  But you need more than "it will
be better".