From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from bombadil.infradead.org ([65.50.211.133]:39979 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755138AbdDRKM1 (ORCPT ); Tue, 18 Apr 2017 06:12:27 -0400 Date: Tue, 18 Apr 2017 03:12:26 -0700 From: Christoph Hellwig Subject: Re: [PATCH v4 2/4] generic: test mmap io fom DAX to non-DAX Message-ID: <20170418101226.GA15898@infradead.org> References: <1492008380-29164-1-git-send-email-xzhou@redhat.com> <1492413255-11146-1-git-send-email-xzhou@redhat.com> <1492413255-11146-3-git-send-email-xzhou@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1492413255-11146-3-git-send-email-xzhou@redhat.com> Sender: fstests-owner@vger.kernel.org To: Xiong Zhou Cc: fstests@vger.kernel.org, ross.zwisler@linux.intel.com, dan.j.williams@intel.com, jmoyer@redhat.com, eguan@redhat.com List-ID: On Mon, Apr 17, 2017 at 03:14:13PM +0800, Xiong Zhou wrote: > Mount TEST_DEV as non-DAX, SCRATCH_DEV as DAX, then > do mmap DIO from DAX to non-DAX. > > This test is split from generic/413. Since DIO from DAX > to non-DAX is only supported/doable when device underneath > has memory(struct page) backend. > > By ndctl looking at SCRATCH_DEV, skip this test if it is > not in "memory mode". DAX devices don't need to be something using NFIT, so I don't think this method is correct.