From: Christoph Hellwig <hch@lst.de>
To: Dan Williams <dan.j.williams@intel.com>
Cc: linux-mm@kvack.org, linux-nvdimm@lists.01.org,
david@fromorbit.com, linux-kernel@vger.kernel.org,
npiggin@gmail.com, xfs@oss.sgi.com,
linux-fsdevel@vger.kernel.org, hch@lst.de
Subject: Re: [PATCH v2 2/3] mm, dax: add VM_DAX flag for DAX VMAs
Date: Thu, 15 Sep 2016 10:26:15 +0200 [thread overview]
Message-ID: <20160915082615.GA9772@lst.de> (raw)
In-Reply-To: <147392247875.9873.4205533916442000884.stgit@dwillia2-desk3.amr.corp.intel.com>
On Wed, Sep 14, 2016 at 11:54:38PM -0700, Dan Williams wrote:
> The DAX property, page cache bypass, of a VMA is only detectable via the
> vma_is_dax() helper to check the S_DAX inode flag. However, this is
> only available internal to the kernel and is a property that userspace
> applications would like to interrogate.
They have absolutely no business knowing such an implementation detail.
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next prev parent reply other threads:[~2016-09-15 8:26 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-15 6:54 [PATCH v2 0/3] mm, dax: export dax capabilities and mapping size info to userspace Dan Williams
2016-09-15 6:54 ` [PATCH v2 1/3] mm, dax: add VM_SYNC flag for device-dax VMAs Dan Williams
2016-09-15 6:54 ` [PATCH v2 2/3] mm, dax: add VM_DAX flag for DAX VMAs Dan Williams
2016-09-15 8:26 ` Christoph Hellwig [this message]
2016-09-15 17:01 ` Dan Williams
2016-09-15 17:09 ` Darrick J. Wong
2016-09-15 17:44 ` Dan Williams
2016-09-15 23:07 ` Dave Chinner
2016-09-15 23:19 ` Dan Williams
2016-09-16 0:16 ` Dan Williams
2016-09-16 1:24 ` Dave Chinner
2016-09-16 2:04 ` Dan Williams
2016-09-16 3:41 ` Dan Williams
2016-09-16 5:36 ` Dave Chinner
2016-09-16 10:47 ` Dan Williams
2016-09-15 6:54 ` [PATCH v2 3/3] mm, mincore2(): retrieve tlb-size attributes of an address range Dan Williams
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