From: "hch@infradead.org" <hch@infradead.org>
To: "Verma, Vishal L" <vishal.l.verma@intel.com>
Cc: "Williams, Dan J" <dan.j.williams@intel.com>,
"hch@infradead.org" <hch@infradead.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-block@vger.kernel.org" <linux-block@vger.kernel.org>,
"xfs@oss.sgi.com" <xfs@oss.sgi.com>,
"linux-nvdimm@ml01.01.org" <linux-nvdimm@ml01.01.org>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
"viro@zeniv.linux.org.uk" <viro@zeniv.linux.org.uk>,
"axboe@fb.com" <axboe@fb.com>,
"akpm@linux-foundation.org" <akpm@linux-foundation.org>,
"linux-fsdevel@vger.kernel.org" <linux-fsdevel@vger.kernel.org>,
"linux-ext4@vger.kernel.org" <linux-ext4@vger.kernel.org>,
"david@fromorbit.com" <david@fromorbit.com>,
"jack@suse.cz" <jack@suse.cz>, "matthew@wil.cx" <matthew@wil.cx>
Subject: Re: [PATCH v4 5/7] fs: prioritize and separate direct_io from dax_io
Date: Sun, 8 May 2016 02:01:15 -0700 [thread overview]
Message-ID: <20160508090115.GE15458@infradead.org> (raw)
In-Reply-To: <1462484695.29294.7.camel@intel.com>
On Thu, May 05, 2016 at 09:45:07PM +0000, Verma, Vishal L wrote:
> I'm not sure I completely understand how this will work? Can you explain
> a bit? Would we have to export rw_bytes up to layers above the pmem
> driver? Where does get_user_pages come in?
A DAX filesystem can directly use the nvdimm layer the same way btt
doe,s what's the problem?
Re get_user_pages my idea was to simply use that to lock down the user
pages so that we can call rw_bytes on it. How else would you do it? Do
a kmalloc, copy_from_user and then another memcpy?
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next prev parent reply other threads:[~2016-05-08 9:01 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-28 21:16 [PATCH v4 0/7] dax: handling media errors Vishal Verma
2016-04-28 21:16 ` [PATCH v4 1/7] block, dax: pass blk_dax_ctl through to drivers Vishal Verma
2016-04-28 21:16 ` [PATCH v4 2/7] dax: fallback from pmd to pte on error Vishal Verma
2016-04-28 21:16 ` [PATCH v4 3/7] dax: enable dax in the presence of known media errors (badblocks) Vishal Verma
2016-04-28 21:16 ` [PATCH v4 4/7] dax: use sb_issue_zerout instead of calling dax_clear_sectors Vishal Verma
2016-04-28 21:16 ` [PATCH v4 5/7] fs: prioritize and separate direct_io from dax_io Vishal Verma
2016-05-02 14:56 ` Christoph Hellwig
2016-05-02 15:45 ` Vishal Verma
2016-05-02 15:41 ` Boaz Harrosh
2016-05-02 15:51 ` Vishal Verma
2016-05-02 16:03 ` Boaz Harrosh
2016-05-02 18:52 ` Verma, Vishal L
2016-05-02 16:01 ` Dan Williams
2016-05-02 16:22 ` Boaz Harrosh
2016-05-02 16:49 ` Dan Williams
2016-05-02 17:44 ` Boaz Harrosh
2016-05-02 18:10 ` Dan Williams
2016-05-02 18:32 ` Boaz Harrosh
2016-05-02 18:48 ` Dan Williams
2016-05-02 19:22 ` Boaz Harrosh
2016-05-05 14:24 ` Christoph Hellwig
2016-05-05 15:15 ` Dan Williams
2016-05-05 15:22 ` Christoph Hellwig
2016-05-05 16:24 ` Dan Williams
2016-05-05 21:45 ` Verma, Vishal L
2016-05-08 9:01 ` hch [this message]
2016-05-08 18:42 ` Verma, Vishal L
2016-05-05 21:42 ` Verma, Vishal L
2016-05-05 21:39 ` Verma, Vishal L
2016-05-08 9:01 ` hch
2016-04-28 21:16 ` [PATCH v4 6/7] dax: for truncate/hole-punch, do zeroing through the driver if possible Vishal Verma
2016-04-28 21:16 ` [PATCH v4 7/7] dax: fix a comment in dax_zero_page_range and dax_truncate_page Vishal Verma
2016-04-29 21:55 ` [PATCH v4 8/7] Documentation: add error handling information to dax.txt Vishal Verma
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