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Subject: Re: [PATCH] dax, pmem: add support for msync
To: Boaz Harrosh <boaz@plexistor.com>, Dave Chinner <david@fromorbit.com>,
        Ross Zwisler <ross.zwisler@linux.intel.com>,
        Christoph Hellwig <hch@lst.de>, linux-kernel@vger.kernel.org,
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        Andrew Morton <akpm@osdl.org>, "H. Peter Anvin" <hpa@zytor.com>,
        Hugh Dickins <hughd@google.com>, Ingo Molnar <mingo@redhat.com>,
        "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
        linux-fsdevel@vger.kernel.org, linux-mm@kvack.org,
        linux-nvdimm@ml01.01.org, Matthew Wilcox <willy@linux.intel.com>,
        Peter Zijlstra <peterz@infradead.org>,
        Thomas Gleixner <tglx@linutronix.de>, x86@kernel.org
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From: Dave Hansen <dave.hansen@linux.intel.com>
Message-ID: <55E7217B.2090803@linux.intel.com>
Date: Wed, 2 Sep 2015 09:19:07 -0700
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On 09/02/2015 09:00 AM, Boaz Harrosh wrote:
>> > We are going to have 2-socket systems with 6TB of persistent memory in
>> > them.  I think it's important to design this mechanism so that it scales
>> > to memory sizes like that and supports large mmap()s.
>> > 
>> > I'm not sure the application you've seen thus far are very
>> > representative of what we want to design for.
>> > 
> We have a patch pending to introduce a new mmap flag that pmem aware
> applications can set to eliminate any kind of flushing. MMAP_PMEM_AWARE.

Great!  Do you have a link so that I can review it and compare it to
Ross's approach?