From: Ross Zwisler <ross.zwisler@linux.intel.com>
To: Boaz Harrosh <boaz@plexistor.com>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>,
Christoph Hellwig <hch@lst.de>,
Dave Chinner <david@fromorbit.com>, Andrew Morton <akpm@osdl.org>,
Dave Hansen <dave.hansen@linux.intel.com>,
linux-nvdimm@lists.01.org, Peter Zijlstra <peterz@infradead.org>,
x86@kernel.org, Hugh Dickins <hughd@google.com>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
Ingo Molnar <mingo@redhat.com>,
Alexander Viro <viro@zeniv.linux.org.uk>,
"H. Peter Anvin" <hpa@zytor.com>,
linux-fsdevel@vger.kernel.org,
Thomas Gleixner <tglx@linutronix.de>,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Subject: Re: [PATCH] dax, pmem: add support for msync
Date: Thu, 3 Sep 2015 10:44:53 -0600 [thread overview]
Message-ID: <20150903164453.GA10341@linux.intel.com> (raw)
In-Reply-To: <55E7E962.2000607@plexistor.com>
On Thu, Sep 03, 2015 at 09:32:02AM +0300, Boaz Harrosh wrote:
> On 09/02/2015 10:04 PM, Ross Zwisler wrote:
> > On Tue, Sep 01, 2015 at 03:18:41PM +0300, Boaz Harrosh wrote:
> <>
> >> Apps expect all these to work:
> >> 1. open mmap m-write msync ... close
> >> 2. open mmap m-write fsync ... close
> >> 3. open mmap m-write unmap ... fsync close
> >>
> >> 4. open mmap m-write sync ...
> >
> > So basically you made close have an implicit fsync? What about the flow that
> > looks like this:
> >
> > 5. open mmap close m-write
> >
>
> What? no, close means ummap because you need a file* attached to your vma
>
> And you miss-understood me, the vm_opts->close is the *unmap* operation not
> the file::close() operation.
>
> I meant memory-cl_flush on unmap before the vma goes away.
Ah, got it, thanks for the clarification.
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next prev parent reply other threads:[~2015-09-03 16:45 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-08-31 18:59 [PATCH] dax, pmem: add support for msync Ross Zwisler
2015-08-31 19:06 ` Christoph Hellwig
2015-08-31 19:26 ` Ross Zwisler
2015-08-31 19:34 ` Christoph Hellwig
2015-08-31 23:38 ` Dave Chinner
2015-09-01 7:06 ` Christoph Hellwig
2015-09-01 12:18 ` Boaz Harrosh
2015-09-02 19:04 ` Ross Zwisler
2015-09-02 20:17 ` Kirill A. Shutemov
2015-09-03 6:32 ` Boaz Harrosh
2015-09-03 16:44 ` Ross Zwisler [this message]
2015-09-01 22:21 ` Dave Chinner
2015-09-02 3:19 ` Ross Zwisler
2015-09-02 5:17 ` Dave Chinner
2015-09-02 10:27 ` Boaz Harrosh
2015-09-02 14:23 ` Dave Hansen
2015-09-02 15:18 ` Boaz Harrosh
2015-09-02 15:39 ` Dave Hansen
2015-09-02 16:00 ` Boaz Harrosh
2015-09-02 16:19 ` Dave Hansen
2015-09-03 6:41 ` Boaz Harrosh
2015-09-02 10:04 ` Boaz Harrosh
2015-09-01 10:08 ` Kirill A. Shutemov
2015-09-01 11:27 ` Boaz Harrosh
2015-09-01 22:49 ` Dave Chinner
2015-09-02 9:13 ` Kirill A. Shutemov
2015-09-02 9:37 ` Boaz Harrosh
2015-09-02 9:41 ` Boaz Harrosh
2015-09-02 9:47 ` Kirill A. Shutemov
2015-09-02 10:28 ` Boaz Harrosh
2015-09-03 0:57 ` Dave Chinner
2015-09-01 13:12 ` Boaz Harrosh
2015-09-02 17:47 ` Ross Zwisler
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